CN106867490A - A kind of chelating de-plugging agent suitable for complicated fouling reservoir and preparation method thereof - Google Patents
A kind of chelating de-plugging agent suitable for complicated fouling reservoir and preparation method thereof Download PDFInfo
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- CN106867490A CN106867490A CN201710035213.1A CN201710035213A CN106867490A CN 106867490 A CN106867490 A CN 106867490A CN 201710035213 A CN201710035213 A CN 201710035213A CN 106867490 A CN106867490 A CN 106867490A
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- chelating
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- chelate compound
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- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 174
- 239000002738 chelating agent Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 230000000740 bleeding effect Effects 0.000 claims abstract description 43
- 239000012153 distilled water Substances 0.000 claims abstract description 28
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 102000018779 Replication Protein C Human genes 0.000 claims abstract description 7
- 108010027647 Replication Protein C Proteins 0.000 claims abstract description 7
- 239000013522 chelant Substances 0.000 claims description 59
- 150000001875 compounds Chemical class 0.000 claims description 47
- 239000000203 mixture Substances 0.000 claims description 44
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 40
- 239000012190 activator Substances 0.000 claims description 37
- 239000002253 acid Substances 0.000 claims description 34
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Natural products OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 28
- RZJRJXONCZWCBN-UHFFFAOYSA-N octadecane Chemical compound CCCCCCCCCCCCCCCCCC RZJRJXONCZWCBN-UHFFFAOYSA-N 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 24
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 22
- 229920001577 copolymer Polymers 0.000 claims description 17
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 16
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 16
- 229910019142 PO4 Inorganic materials 0.000 claims description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 15
- 239000010452 phosphate Substances 0.000 claims description 15
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 229940038384 octadecane Drugs 0.000 claims description 14
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 13
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 13
- 238000010792 warming Methods 0.000 claims description 13
- VKZRWSNIWNFCIQ-WDSKDSINSA-N (2s)-2-[2-[[(1s)-1,2-dicarboxyethyl]amino]ethylamino]butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)NCCN[C@H](C(O)=O)CC(O)=O VKZRWSNIWNFCIQ-WDSKDSINSA-N 0.000 claims description 12
- 229940120146 EDTMP Drugs 0.000 claims description 12
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 12
- YVJGIGDFHMIDFH-FTWQHDNSSA-N n-[(2s,3r,4r,5r,6r)-4,5-dihydroxy-6-(hydroxymethyl)-2-methoxyoxan-3-yl]-5-(dimethylamino)naphthalene-1-sulfonamide Chemical compound CO[C@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1NS(=O)(=O)C1=CC=CC2=C(N(C)C)C=CC=C12 YVJGIGDFHMIDFH-FTWQHDNSSA-N 0.000 claims description 11
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 claims description 10
- DCEMCPAKSGRHCN-UHFFFAOYSA-N oxirane-2,3-dicarboxylic acid Chemical compound OC(=O)C1OC1C(O)=O DCEMCPAKSGRHCN-UHFFFAOYSA-N 0.000 claims description 10
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims description 10
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 9
- 229960001484 edetic acid Drugs 0.000 claims description 9
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 8
- JJJOZVFVARQUJV-UHFFFAOYSA-N 2-ethylhexylphosphonic acid Chemical compound CCCCC(CC)CP(O)(O)=O JJJOZVFVARQUJV-UHFFFAOYSA-N 0.000 claims description 8
- 239000000176 sodium gluconate Substances 0.000 claims description 8
- 229940005574 sodium gluconate Drugs 0.000 claims description 8
- 235000012207 sodium gluconate Nutrition 0.000 claims description 8
- MPDDTAJMJCESGV-CTUHWIOQSA-M (3r,5r)-7-[2-(4-fluorophenyl)-5-[methyl-[(1r)-1-phenylethyl]carbamoyl]-4-propan-2-ylpyrazol-3-yl]-3,5-dihydroxyheptanoate Chemical compound C1([C@@H](C)N(C)C(=O)C2=NN(C(CC[C@@H](O)C[C@@H](O)CC([O-])=O)=C2C(C)C)C=2C=CC(F)=CC=2)=CC=CC=C1 MPDDTAJMJCESGV-CTUHWIOQSA-M 0.000 claims description 5
- 229940125810 compound 20 Drugs 0.000 claims description 5
- JAXFJECJQZDFJS-XHEPKHHKSA-N gtpl8555 Chemical compound OC(=O)C[C@H](N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@@H]1C(=O)N[C@H](B1O[C@@]2(C)[C@H]3C[C@H](C3(C)C)C[C@H]2O1)CCC1=CC=C(F)C=C1 JAXFJECJQZDFJS-XHEPKHHKSA-N 0.000 claims description 5
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 3
- 229940125773 compound 10 Drugs 0.000 claims description 3
- ZLVXBBHTMQJRSX-VMGNSXQWSA-N jdtic Chemical compound C1([C@]2(C)CCN(C[C@@H]2C)C[C@H](C(C)C)NC(=O)[C@@H]2NCC3=CC(O)=CC=C3C2)=CC=CC(O)=C1 ZLVXBBHTMQJRSX-VMGNSXQWSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims 2
- 241001614291 Anoplistes Species 0.000 claims 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 9
- 230000008021 deposition Effects 0.000 abstract description 9
- 238000000151 deposition Methods 0.000 abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 6
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 abstract description 6
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- 150000007513 acids Chemical class 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- -1 sulfate compound Chemical class 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000004579 marble Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- WJIUUKVQXQFABS-RGMNGODLSA-N C(C(=O)O)(=O)O.C(CC)N[C@@H](CCO)C(=O)O Chemical compound C(C(=O)O)(=O)O.C(CC)N[C@@H](CCO)C(=O)O WJIUUKVQXQFABS-RGMNGODLSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000040710 Chela Species 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric Acid Chemical compound [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- BVCHZEOVPXACBQ-UHFFFAOYSA-N [Ca][Ba][Sr] Chemical compound [Ca][Ba][Sr] BVCHZEOVPXACBQ-UHFFFAOYSA-N 0.000 description 1
- BQODPTQLXVVEJG-UHFFFAOYSA-N [O].C=C Chemical compound [O].C=C BQODPTQLXVVEJG-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a kind of chelating de-plugging agent suitable for complicated fouling reservoir and preparation method thereof, chelating de-plugging agent is made up of the component of following mass percent：Chelating agent 5%~20%；Antisludging agent 0.5%~1%；Activator 1%~5%；Bleeding agent 0.5%~2%；Its balance of distilled water.The complicated tamper de-plugging that the chelating de-plugging agent can be constituted the complexity inorganic scale such as most of carbonic acid dirt, sulfuric acid dirt and organic deposition in fouling oil reservoir near wellbore zone, and the generation of dirt can be suppressed, extend action time.The chelating de-plugging agent is mainly for calcium carbonate, calcium sulfate, barium and strontium sulfate, the complicated dirt such as iron sulfide is blocked, fouling and clogging thing is released by permeating dispersion, chelating solubilising, nucleus distortion, dredging pit shaft and stratum filtration passage, reduce oil gas resistance to water-flow, oil gas well production is improved, water injection well injection pressure is reduced；The chelating de-plugging agent possesses certain inhibition and erodible, complicated fouling reservoir blockages relieving condition of satisfaction simultaneously.
Description
Technical field
The invention belongs to a kind of chelating de-plugging agent suitable for complicated fouling reservoir and preparation method thereof, particularly relate to
And the reservoir comprising Various Complex composition dirt body, such as carbonate scale, sulfate scale, indissoluble silicate, iron sulfide, by strength
Chelating solubilising releases tamper, reaches and effectively expands plug removal radius, reduces well water injection pressure, extends the work of steady output of oilwell phase
With.
Background technology
In the development process of oil gas field, fouling is a problem being difficult to avoid that.During oil-gas mining, ground laminar flow
By preforation tunnel, pit shaft, well head, the environmental pressure temperature where fluid there occurs change to body, and stratum water incrustation ion is original
Chemistry balance state is broken, and causes inorganic mineralization and generates dirt.Simultaneously during production of hydrocarbons, fine migration in reservoir
Separated out with heavy component and produce organic deposition, reduce oil and gas flow passage.During development of low-permeability oil reservoir, water injection technology is general
All over application supplementing stratum energy, recovery ratio is improved, but injection water and stratum water have that compatibility is poor, easily the sulphur of formation slightly solubility
Silicate dirt, blocks water stream channel, causes water injection pressure to raise, and water injection rate declines, and high pressure is developed into when serious and is shorted, and correspondence oil
The reduction of well stratum energy, influences oilfield stimulation stable yields.
Fouling can make reservoir, pit shaft, production tube, underground equipment and ground oil-gas gathering and transportation equipment form deposition blocking,
The economic benefit of oil field development is had a strong impact on.Currently for reservoir fouling, using acidification, this kind offensiveness de-plugging mode
Erodable carbonate, but removing sulfate deposition can not be solved, and there is the excessive corrosion near wellbore zone, deep poor processing effect, effect
The shortcomings of limited time.
The existing de-plugging agent for releasing compound scale is converted into carbonic acid dirt to sulfuric acid dirt, it is necessary to pump into pretreatment fluid, then pump
Treatment acid solution solution depollution is become owner of, this kind of de-plugging mode can release sulfate compound scale, but there are complicated process steps, during closing well
Between long, acid solution secondary precipitation problem.
The content of the invention
Present invention aim to address it is existing there are complicated process steps, closing well for releasing the de-plugging agent of compound scale when
Between long, acid solution secondary precipitation and the problems such as poor plugging removal effect.
Therefore, the invention provides a kind of chelating de-plugging agent suitable for complicated fouling reservoir, the chelating de-plugging agent by
The component composition of following mass percent：
Chelating agent 5%~20%；
Antisludging agent 0.5%~1%；
Activator 1%~5%；
Bleeding agent 0.5%~2%；
Its balance of distilled water.
The chelating agent is made up of the component of following mass percent：
Amino carboxylic acid quasi-chelate compound 50%~60%；
Hydroxycarboxylic acid quasi-chelate compound 10%~20%；
Organic phosphonate quasi-chelate compound 20%~30%.
The antisludging agent is made up of one or two in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid.
The activator is by the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5
Plant or two kinds of compositions.
The bleeding agent is by one or two groups in tridecanol polyoxyethylene ether phosphate, AEO
Into.
The amino carboxylic acid quasi-chelate compound be ethylenediamine tetra-acetic acid, diethylene triamine pentacetic acid (DTPA), MDGA,
Three kinds in EDDS, 2- iminodisuccinic acids or several compositions；Described hydroxycarboxylic acid quasi-chelate compound
It is one or more compositions in sodium gluconate, dyhydrobutanedioic acid, beta-hydroxy-butanoic acid, the acid of 3- hydroxyls -1,3,5- penta 3；
Described organic phosphonate quasi-chelate compound is in l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetramethylene phosphonic acid
One or more compositions.
A kind of preparation method of chelating de-plugging agent suitable for complicated fouling reservoir, the chelating de-plugging agent and its quality are matched somebody with somebody
Than including chelating agent 5%~20%, antisludging agent 0.5%~1%, activator 1%~5%, bleeding agent 0.5%~2%, its balance of distillation
Water,
Comprise the following steps that：To adding distilled water in reactor, and be warming up to 50~55 DEG C, then by chelating agent, activator, ooze
Saturating agent, antisludging agent are sequentially added in reactor, often add a kind of 20~30min of material stirring, are stirred after all material to be added
30min, completes the preparation of chelating de-plugging agent；
The addition of above-mentioned raw materials is added by formula ratio.
The chelating agent is made up of the component of following mass percent：Amino carboxylic acid quasi-chelate compound 50%~60%, hydroxyl carboxylic
Acids chelating agent 10%~20%, organic phosphonate quasi-chelate compound 20%~30%, amino carboxylic acid quasi-chelate compound be ethylenediamine tetra-acetic acid,
Three kinds in diethylene triamine pentacetic acid (DTPA), MDGA, EDDS, 2- iminodisuccinic acids
Or several compositions, hydroxycarboxylic acid quasi-chelate compound is sodium gluconate, dyhydrobutanedioic acid, beta-hydroxy-butanoic acid, 3- hydroxyl -1,3,5-
One or more compositions in penta 3 acid, organic phosphonate quasi-chelate compound is l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetraacetic
One or more compositions in methylene phosphonic acid；
The antisludging agent is made up of one or two in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid；
The activator by the one kind in the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5 or
Two kinds of compositions；
The bleeding agent is made up of one or two in tridecanol polyoxyethylene ether phosphate, AEO.
Beneficial effects of the present invention：This chelating de-plugging agent and its system suitable for complicated fouling reservoir that the present invention is provided
Preparation Method, can be constituted the complexity inorganic scale such as most of carbonic acid dirt, sulfuric acid dirt and organic deposition in fouling oil reservoir near wellbore zone
Complicated tamper de-plugging, and the generation of dirt can be suppressed, extend action time.The chelating de-plugging agent is mainly for calcium carbonate, sulfuric acid
The complicated dirt blocking such as calcium, barium and strontium sulfate, iron sulfide, by infiltration dispersion, chelating solubilising, nucleus distortion releasing fouling and clogging
Thing, dredging pit shaft and stratum filtration passage, reduce oil gas resistance to water-flow, improve oil gas well production, reduce water injection well injection pressure；
The chelating de-plugging agent possesses certain inhibition and erodible, complicated fouling reservoir blockages relieving condition of satisfaction simultaneously.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is that de-plugging agent is chelated in embodiment 8 under the conditions of 60 DEG C to the schematic diagram of the chelating result of different ions.
Fig. 2 is that de-plugging agent is chelated in embodiment 8 under the conditions of 60 DEG C, 4h to the schematic diagram of the corrosion effect of different material.
Specific embodiment
Oil/gas Well persistently rises to form inorganic dirt deposition by long-term exploitation, water content, and fine migration is analysed with heavy component
The organic depositions such as collagen pitch are produced, oil and gas flow passage is blocked.Water injection well injects water and stratum compatible by long-term injecting water
Property it is poor, cause reservoir deep to be slowly formed inorganic scale, block water drive passage, be that this is applied to complicated knot the invention provides one kind
The chelating de-plugging agent of dirty reservoir, the chelating de-plugging agent is made up of the component of following mass percent：
Chelating agent 5%~20%；
Antisludging agent 0.5%~1%；
Activator 1%~5%；
Bleeding agent 0.5%~2%；
Its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent；
The addition of above-mentioned raw materials is added by formula ratio.
The chelating agent is made up of the component of following mass percent：Amino carboxylic acid quasi-chelate compound 50%~60%, hydroxyl carboxylic
Acids chelating agent 10%~20%, organic phosphonate quasi-chelate compound 20%~30%, chelating agent is mixed to prepare by three of the above component,
Amino carboxylic acid quasi-chelate compound is ethylenediamine tetra-acetic acid, diethylene triamine pentacetic acid (DTPA), MDGA, the amber of ethylenediamine two
Three kinds or several compositions in acid, 2- iminodisuccinic acids, hydroxycarboxylic acid quasi-chelate compound are sodium gluconate, dihydroxy
Succinic acid, beta-hydroxy-butanoic acid, 3- hydroxyl -1, one or more in 3,5- penta 3 acid are constituted, and organic phosphonate quasi-chelate compound is
One or more compositions in l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetramethylene phosphonic acid；
The antisludging agent is made up of one or two in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid；The activation
Agent is made up of one or two in the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5；Institute
Bleeding agent is stated to be made up of one or two in tridecanol polyoxyethylene ether phosphate, AEO.
Above dosage component is commercial chemicals.
It should be noted that in the present invention,（1）Bleeding agent（Tridecanol polyoxyethylene ether phosphate, fatty alcohol polyoxy second
Alkene ether）In one or two kinds of can reduce surface/interface tension force, wash Residual oil, DOM, rapid osmotic, fat
The molecular weight of alcohol APEO is 1199.55.（2）Chelating agent（Ethylenediamine tetra-acetic acid, diethylene triamine pentacetic acid (DTPA), methyl are sweet
Propylhomoserin oxalic acid, EDDS, 2- iminodisuccinic acids, sodium gluconate, dyhydrobutanedioic acid, beta-hydroxy fourth
Acid, 3- hydroxyl -1,3,5- penta 3 acid, l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetramethylene phosphonic acid）In various energy
Metal ion in enough effectively chelating inorganic scales, suppresses secondary precipitation and produces with nucleus distortion shape and electric charge dispersion；（3）Activator
（The oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5）In one or two can be to indissoluble
The metal ion enhancing chelation of dirt, forms the more stable structure of thermodynamics, reduces calcium barium strontium dirt content.（4）Antisludging agent
It is that can be adsorbed on stratum by one or two in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid, suppresses the shape of dirt
Into copolymer of maleic anhydride and acrylic acid is a kind of macromolecule builder as substitute for phosphate, is a kind of one kind of anti-incrustation corrosion inhibitor, and it can be chelated
Ca2+、Mg2+And there is soft water function, and can by dirt be suspended in water and tissue inorganic salts crystallization have in body surface it is anti-
Resedimentation, copolymer of maleic anhydride and acrylic acid has chelating and divergent function simultaneously, improves the dispersiveness of chelate, its
Middle poly-epoxy succinic acid relative molecular mass：800-1700, has scale inhibitor double effects concurrently, and biodegradability is got well and is applicable
In high-alkali, high metal content water system.
The chelating de-plugging agent that the present invention is provided mainly for calcium carbonate, calcium sulfate, barium and strontium sulfate, the complicated dirt such as iron sulfide
Blocking, fouling and clogging thing, dredging pit shaft and stratum filtration passage are released by permeating dispersion, chelating solubilising, nucleus distortion, are reduced
Oil gas resistance to water-flow, improves oil gas well production, reduces water injection well injection pressure.The chelating de-plugging agent is adapted to complicated fouling reservoir
Chelating de-plugging agent can fouling oil reservoir near wellbore zone by most of carbonic acid dirt, sulfuric acid dirt etc. complexity inorganic scale and organic deposition constitute
Complicated tamper de-plugging, and can suppress dirt generation, extend action time.Construction uses single slug, simplifies working procedure,
Save the engineering time.Reach and effectively expand plug removal radius, reduce well water injection pressure, extend the effect of steady output of oilwell phase.
Embodiment 1：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 5%, antisludging agent 0.5%, activator 1%, bleeding agent 0.5%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Ethylenediamine tetra-acetic acid（Account for amino carboxylic acid
Quasi-chelate compound percentage by weight is 30%）, diethylene triamine pentacetic acid (DTPA)（It is 30% to account for amino carboxylic acid quasi-chelate compound percentage by weight）、
MDGA（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 50%, sodium gluconate 20%,
L- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid 30%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,4,7,10,13,
The oxygen ring octadecane -2- methyl alcohol of 16- six；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 2：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 6%, antisludging agent 0.6%, activator 1.5%, bleeding agent 0.7%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Diethylene triamine pentacetic acid (DTPA)（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, MDGA（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, EDDS（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 50%, dihydroxy fourth two
Acid 20%, ethylenediamine tetramethylene phosphonic acid 30%；Antisludging agent is poly-epoxy succinic acid copolymer；Activator is dibenzo -15- hats
Ether -5；Bleeding agent is AEO.
Embodiment 3：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 8%, antisludging agent 0.7%, activator 2.3%, bleeding agent 0.9%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：MDGA（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, EDDS（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, 2- iminodisuccinic acids（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 57%, beta-hydroxy fourth
Acid 15%, l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid 28%；Antisludging agent is copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid；
Activator is the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5；Bleeding agent is that tridecanol gathers
Oxygen ethene ether phosphate, AEO.
Embodiment 4：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 10%, antisludging agent 0.79%, activator 3.4%, bleeding agent 1%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：2- iminodisuccinic acids（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, EDDS（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, MDGA（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 55%, 3- hydroxyl -1,
3,5- penta 3 acid 15%, ethylenediamine tetramethylene phosphonic acid 30%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,
The oxygen ring octadecane -2- methyl alcohol of 4,7,10,13,16- six；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 5：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 13%, antisludging agent 0.83%, activator 4%, bleeding agent 1.5%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Ethylenediamine tetra-acetic acid（Account for amino carboxylic acid
Quasi-chelate compound percentage by weight is 30%）, MDGA（It is 30% to account for amino carboxylic acid quasi-chelate compound percentage by weight）、
2- iminodisuccinic acids（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 52%, 3- hydroxyl -1,3,5-
Penta 3 acid 20%, ethylenediamine tetramethylene phosphonic acid 28%；Antisludging agent is poly-epoxy succinic acid；Activator be dibenzo -15- crown ethers -
5；Bleeding agent is AEO.
Embodiment 6：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 17%, antisludging agent 1%, activator 4.5%, bleeding agent 1.8%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：2- iminodisuccinic acids（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, diethylene triamine pentacetic acid (DTPA)（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, EDDS（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 55%, 3- hydroxyl -1,3,
The acid 15% of 5- penta 3, ethylenediamine tetramethylene phosphonic acid 30%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,4,
The oxygen ring octadecane -2- methyl alcohol of 7,10,13,16- six；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 7：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 19%, antisludging agent 0.5%, activator 5%, bleeding agent 2%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Diethylene triamine pentacetic acid (DTPA)（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, 2- iminodisuccinic acids（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, EDDS（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 58%, sodium gluconate
15%, ethylenediamine tetramethylene phosphonic acid 27%；Antisludging agent is copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid；Activator is
The oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5；Bleeding agent is tridecanol polyoxyethylene ether
Phosphate.
Embodiment 8：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 20%, antisludging agent 1%, activator 5%, bleeding agent 2%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Diethylene triamine pentacetic acid (DTPA)（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, 2- iminodisuccinic acids（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, EDDS（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 59%, dihydroxy fourth two
Acid 16%, ethylenediamine tetramethylene phosphonic acid 25%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,4,7,10,
The oxygen ring octadecane -2- methyl alcohol of 13,16- six, dibenzo -15- crown ethers -5；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 9：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 15%, antisludging agent 0.8%, activator 3%, bleeding agent 1.4%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：MDGA（Account for amino
Carboxylic acid quasi-chelate compound percentage by weight is 30%）, 2- iminodisuccinic acids（Accounting for amino carboxylic acid quasi-chelate compound percentage by weight is
30%）, EDDS（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 51%, dihydroxy fourth two
Acid 20%, ethylenediamine tetramethylene phosphonic acid 29%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,4,7,10,
The oxygen ring octadecane -2- methyl alcohol of 13,16- six；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 10：
A kind of chelating de-plugging agent suitable for complicated fouling reservoir is present embodiments provided, the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 11%, antisludging agent 0.65%, activator 1.7%, bleeding agent 1.57%, its balance of distilled water.
The preparation method of above-mentioned chelating de-plugging agent, comprises the following steps that：To adding distilled water in reactor, and it is warming up to 50
~55 DEG C, then chelating agent, activator, bleeding agent, antisludging agent are sequentially added in reactor, a kind of material stirring 20 of often addition~
30min, stirs 30min after all material to be added, complete the preparation of chelating de-plugging agent.
Chelating agent is made up of the component of following mass percent in the present embodiment：Ethylenediamine tetra-acetic acid（Account for amino carboxylic acid
Quasi-chelate compound percentage by weight is 30%）, 2- iminodisuccinic acids（It is 30% to account for amino carboxylic acid quasi-chelate compound percentage by weight）、
Diethylene triamine pentacetic acid (DTPA)（It is 40% to account for amino carboxylic acid quasi-chelate compound percentage by weight）Mixture 60%, dyhydrobutanedioic acid
17%, ethylenediamine tetramethylene phosphonic acid 23%；Antisludging agent is copolymer of maleic anhydride and acrylic acid；Activator is 1,4,7,10,13,
The oxygen ring octadecane -2- methyl alcohol of 16- six；Bleeding agent is tridecanol polyoxyethylene ether phosphate.
Embodiment 11：
The proportioning of the chelating de-plugging agent that the present embodiment is provided according to 1~embodiment of embodiment 10, by chelating de-plugging agent in 60 DEG C, 4h
Under the conditions of, for marble, magnesium carbonate, calcium sulfate, dissolved corrosion test has been carried out respectively, the results are shown in Table 1.
Table 1
From upper table combination Fig. 2, the chelating de-plugging agent for being adapted to complicated fouling reservoir in above example is in 60 DEG C, 4h bars
Corrosion rate under part to marble maximum is 52.60%, magnesium carbonate corrosion rate 36.26%, and calcium sulfate corrosion rate is 60.35%, is met
Complicated fouling reservoir blockages relieving condition, illustrates that chelating de-plugging agent can be dirty by most of carbonic acid dirt, sulfuric acid in fouling oil reservoir near wellbore zone
Deng the complicated tamper de-plugging that complicated inorganic scale and organic deposition are constituted, and dirty generation can be suppressed, extend action time, in addition,
Sequestering power of the chelating de-plugging agent to different ions is understood referring to Fig. 1, illustrates that this chelating de-plugging agent can be by strength chela
Solubilization Various Complex composition dirt body is closed, including carbonate scale, sulfate scale, indissoluble silicate, iron sulfide etc., is reached effectively
Expand plug removal radius, reduce well water injection pressure, extend the effect of steady output of oilwell phase.
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.The portion that the present embodiment is not described in detail
Part and structure belong to the well-known components and common structure or conventional means of the industry, do not describe one by one here.
Claims (8)
1. a kind of chelating de-plugging agent suitable for complicated fouling reservoir, it is characterised in that the chelating de-plugging agent is by following quality
The component composition of percentage：
Chelating agent 5%~20%；
Antisludging agent 0.5%~1%；
Activator 1%~5%；
Bleeding agent 0.5%~2%；
Its balance of distilled water.
2. the as claimed in claim 1 chelating de-plugging agent for being applied to complicated fouling reservoir, it is characterised in that the chelating agent by
The component composition of following mass percent：
Amino carboxylic acid quasi-chelate compound 50%~60%；
Hydroxycarboxylic acid quasi-chelate compound 10%~20%；
Organic phosphonate quasi-chelate compound 20%~30%.
3. the as claimed in claim 1 chelating de-plugging agent for being applied to complicated fouling reservoir, it is characterised in that the antisludging agent by
One or two compositions in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid.
4. the as claimed in claim 1 chelating de-plugging agent for being applied to complicated fouling reservoir, it is characterised in that the activator by
One or two compositions in the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5.
5. the as claimed in claim 1 chelating de-plugging agent for being applied to complicated fouling reservoir, it is characterised in that the bleeding agent by
One or two compositions in tridecanol polyoxyethylene ether phosphate, AEO.
6. the chelating de-plugging agent of complicated fouling reservoir is applied to as claimed in claim 2, it is characterised in that the amino carboxylic acid
Quasi-chelate compound is ethylenediamine tetra-acetic acid, diethylene triamine pentacetic acid (DTPA), MDGA, EDDS, 2- Asias
Three kinds in amino disuccinic acid or several compositions；Described hydroxycarboxylic acid quasi-chelate compound is sodium gluconate, dihydroxy
One or more compositions in succinic acid, beta-hydroxy-butanoic acid, the acid of 3- hydroxyls -1,3,5- penta 3；
Described organic phosphonate quasi-chelate compound is in l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetramethylene phosphonic acid
One or more compositions.
7. it is a kind of suitable for complicated fouling reservoir chelating de-plugging agent preparation method, it is characterised in that the chelating de-plugging agent
And its quality proportioning include chelating agent 5%~20%, antisludging agent 0.5%~1%, activator 1%~5%, bleeding agent 0.5%~2%, remaining
It is distilled water to measure,
Comprise the following steps that：To adding distilled water in reactor, and be warming up to 50~55 DEG C, then by chelating agent, activator, ooze
Saturating agent, antisludging agent are sequentially added in reactor, often add a kind of 20~30min of material stirring, are stirred after all material to be added
30min, completes the preparation of chelating de-plugging agent；
The addition of above-mentioned raw materials is added by formula ratio.
8. the preparation method of the chelating de-plugging agent of complicated fouling reservoir is applied to as claimed in claim 7, it is characterised in that institute
Chelating agent is stated to be made up of the component of following mass percent：Amino carboxylic acid quasi-chelate compound 50%~60%, hydroxycarboxylic acid quasi-chelate compound
10%~20%, organic phosphonate quasi-chelate compound 20%~30%, amino carboxylic acid quasi-chelate compound is ethylenediamine tetra-acetic acid, diethylenetriamine
Three kinds in pentaacetic acid, MDGA, EDDS, 2- iminodisuccinic acids or several groups
Into hydroxycarboxylic acid quasi-chelate compound is sodium gluconate, dyhydrobutanedioic acid, beta-hydroxy-butanoic acid, 3- hydroxyl -1, in 3,5- penta 3 acid
One or more composition, organic phosphonate quasi-chelate compound be l- hydroxy ethylenes-l, l- di 2 ethylhexyl phosphonic acid, ethylenediamine tetramethylene phosphine
One or more compositions in acid；
The antisludging agent is made up of one or two in copolymer of maleic anhydride and acrylic acid, poly-epoxy succinic acid；
The activator by the one kind in the oxygen ring octadecane -2- methyl alcohol of 1,4,7,10,13,16- six, dibenzo -15- crown ethers -5 or
Two kinds of compositions；
The bleeding agent is made up of one or two in tridecanol polyoxyethylene ether phosphate, AEO.
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| WO2021257873A1 (en) * | 2020-06-17 | 2021-12-23 | Solugen, Inc. | Compositions and methods for reducing injection pressure in resource recovery operations |
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| CN115960595B (en) * | 2021-10-13 | 2024-06-28 | 中国石油化工股份有限公司 | Blocking remover composition and blocking remover for calcium sulfate scale |
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