CN104046346A - Oil field water injection well descaling agent and preparation method thereof - Google Patents
Oil field water injection well descaling agent and preparation method thereof Download PDFInfo
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- CN104046346A CN104046346A CN201310079116.4A CN201310079116A CN104046346A CN 104046346 A CN104046346 A CN 104046346A CN 201310079116 A CN201310079116 A CN 201310079116A CN 104046346 A CN104046346 A CN 104046346A
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- water injection
- scale
- injection well
- acid
- water
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- 238000002347 injection Methods 0.000 title claims abstract description 59
- 239000007924 injection Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 title abstract description 5
- 239000002332 oil field water Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 37
- -1 polyoxyethylene Polymers 0.000 claims abstract description 26
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 25
- 239000001509 sodium citrate Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims abstract description 14
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims abstract description 14
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 13
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims abstract description 13
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims abstract description 13
- 150000002148 esters Chemical class 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000001632 sodium acetate Substances 0.000 claims abstract description 13
- 235000017281 sodium acetate Nutrition 0.000 claims abstract description 13
- 239000011775 sodium fluoride Substances 0.000 claims abstract description 13
- 235000013024 sodium fluoride Nutrition 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000000470 constituent Substances 0.000 claims description 22
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 13
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 13
- 229940038773 trisodium citrate Drugs 0.000 claims description 13
- GKVKQZRNDGUFSY-NSGFTINJSA-L [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] Chemical compound [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] GKVKQZRNDGUFSY-NSGFTINJSA-L 0.000 claims description 12
- 229940077239 chlorous acid Drugs 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 235000019263 trisodium citrate Nutrition 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 13
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 abstract description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002341 toxic gas Substances 0.000 abstract description 3
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 abstract description 2
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 abstract 1
- GVKDLCPTYCLSQW-YFKNTREVSA-N C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] Chemical compound C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] GVKDLCPTYCLSQW-YFKNTREVSA-N 0.000 abstract 1
- OLAJEGLKIMISFJ-UHFFFAOYSA-N chlorosyl chlorite Chemical compound O=[Cl]O[Cl]=O OLAJEGLKIMISFJ-UHFFFAOYSA-N 0.000 abstract 1
- 229940074439 potassium sodium tartrate Drugs 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 239000004519 grease Substances 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005536 corrosion prevention Methods 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 241000124033 Salix Species 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- VPTUPAVOBUEXMZ-UHFFFAOYSA-N (1-hydroxy-2-phosphonoethyl)phosphonic acid Chemical compound OP(=O)(O)C(O)CP(O)(O)=O VPTUPAVOBUEXMZ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241001247482 Amsonia Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940117927 ethylene oxide Drugs 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- PYODKQIVQIVELM-UHFFFAOYSA-M sodium;2,3-bis(2-methylpropyl)naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S([O-])(=O)=O)=C(CC(C)C)C(CC(C)C)=CC2=C1 PYODKQIVQIVELM-UHFFFAOYSA-M 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
A descaling agent for an oil field water injection well and a preparation method belong to the technical field of oil field development, and are applied to the oil field to remove scale formed on the pipe wall of the water injection well in the water injection development process and improve the water injection efficiency. The weight percentage of the effective components of each component is as follows: hydrochloric acid (concentration 28% -38%): 5-15%; sodium acetate: 0.1-1.5%; sodium citrate: 0.1-1.5%; sodium fluoride: 0.1-8.5%; potassium sodium tartrate: 1-6%; polyoxyethylene ester of rosin acid: 0.05-0.5%; pulling powder open: 0.05-0.4%; di-sec-octyl maleate sodium sulfonate: 0.2-1.5%; solid chlorous anhydride: 0.1-0.6%; hydroxyethylidene diphosphonic acid: 0.5-1.5%; the balance of water, and the sum of the weight percentages of the components is one hundred percent. The effect is as follows: can effectively remove carbonate scale, sulfate scale, ferrous sulfide scale, oil scale and silicate scale in a water injection well, and has the corrosion degree to an oil casing and injection equipment lower than 0.5994mg/cm2H, no toxic gas H2And (5) releasing S.
Description
Technical field
The present invention relates to oil-field development technical field, is a kind of water injection well in oil fields scale remover and preparation method, and the polytype fouling forming for removing water flooding process water injection well tube wall improves water-injection efficiency.
Background technology
At present, in water flooding process, injected water is usually even sewage of surface water, local water, contains a large amount of Ca in these water
2+, Mg
2+, Ba
2+, Si
2+, SO
4 2-, HCO
3 -etc. easy incrustation ion, these ions are entering after pit shaft, along with the effect of conversion and the sulphate reducing bacteria SRB etc. of temperature, pressure, easily form fouling.In addition, irony pit shaft is at O
2, H
2s, CO
2and under the effect of iron bacteria etc., easily generate iron rust and ferrous sulfide scale.After these foulings form, can reduce Water Injection Efficiency, increase well workover number of times, corrosion pit shaft, stops up oil reservoir, and water injection pressure is constantly raise, and causes under logging equipment less than shaft bottom, even damages water injection equipment, causes water injection well to scrap.
The conventional water injection well scale remover in oil field is mainly strong acid class, example hydrochloric acid, nitric acid etc., and strong acid can effectively be removed carbonate scale and iron dirt, but corrodibility is strong, easily cause pit shaft corrosion, and only effective to carbonate and iron dirt, little to sulfate scale and silicate scale effect.In addition, if contain ferrous sulfide scale in fouling, directly can generate H by the words of pickling
2s, easily causes potential safety hazard to workmen.
China Patent Publication No.: CN101186395, a kind of composite acidic scale remover and preparation method thereof is disclosed, to form taking propionic acid, citric acid, amino acid, hydrochloric acid, phosphoric acid and water as preparation of raw material, can effectively remove carbonate scale, and there is sterilizing function and less to institute's cleaning equipment corrodibility.
China Patent Publication No.: CN101913713A, discloses a kind of sulfate scale cleaning agent, and a kind of neutral cleaners being made up of organic carboxylate, organophosphate, reductive agent, tensio-active agent and water is good to vitriol cleaning performance, little to equipment corrosion.
China Patent Publication No.: CN102345136A, a kind of chemical of removing the impurity such as Iron sulfuret is disclosed, formed by acid chelating agent, tensio-active agent, alkaline chelator, oxygenant, inhibiter, solubility promoter and water etc., can effectively remove at normal temperatures ferrous sulfide scale, can not produce toxic gas H
2s.
These can effectively be removed the fouling of some composition, but water injection well fouling complicated component, and the application of these descaling agents all has certain limitation.
Summary of the invention
The object of the invention is: a kind of water injection well in oil fields scale remover and preparation method are provided, injecting after pit shaft, can within a short period of time carbonate scale, sulfate scale, silicate scale, ferrous sulfide scale, grease etc. in pit shaft effectively be cleaned, can not produce toxic gas, little to pit shaft corrodibility, to reach cleaning water injection well, ensure the object of the normal work of waterflood system.
The technical solution used in the present invention is:
One, water injection well in oil fields scale remover, raw material comprises:
1, hydrochloric acid: mass concentration is 28～38%
2, sodium acetate
3, Trisodium Citrate: claim again: Sodium Citrate, trisodium citrate
4, Sodium Fluoride
5, Seignette salt: have another name called: Rochelle salt, rocchelle's salt sodium.
6, sylvic acid polyoxyethylene ester: taking rosin as raw material, make catalyzer with KOH and ethyleneoxide addition forms in autoclave.There is good emulsification, wetting, dispersing property.Purposes: be widely used in the industries such as weaving, paint, agricultural chemicals, oil and make emulsifying agent.Production unit: the long celebrating in Xi'an Chemical Group.
7, pull open powder: have another name called: Nekal BX, penetrating agent BX.Performance: can significantly reduce the surface tension of water, have good seepage force and wettability, rewetting is also splendid, and the performance that there is emulsification, spreads and spume.Production unit: Hubei emerging milky way Chemical Co., Ltd..
8, disecoctylmaleate sodium sulfonate: have another name called: fast penetrant T.Performance: can significantly reduce the surface tension of water, there is good seepage force and wettability.Producer: Xingtai auxiliary reagent factory.
9, solid chlorous acid acid anhydride, has another name called: chloric acid acid anhydride.Molecular formula: ClO
2.Water-soluble, decompose simultaneously.Be dissolved in alkaline solution and generate chlorite and oxymuriate.Purposes: as oxygenant, deodorizing composition, SYNTHETIC OPTICAL WHITNER etc.Production unit: Tianjin Telong Biochemical Co., Ltd.,
10,1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, claims again: hydroxy ethylene diphosphonic acid.HEDP is a kind of organophosphorus acids anti-incrustation corrosion inhibitor, can form stable complex compound with the many kinds of metal ions such as iron, copper, zinc, oxide compound that can dissolution of metals surface.Production unit: Beijing Bluestar Technology Co., Ltd.
11, water, salinity is less than the fresh water of 500mg/L
Water injection well in oil fields scale remover, the weight percent of each component effective constituent is:
Hydrochloric acid (mass concentration: 28～38%): 5～15% (effective constituent is in HCl);
Sodium acetate: 0.1～1.5%;
Trisodium Citrate: 0.1～1.5%;
Sodium Fluoride: 0.1～8.5%;
Seignette salt: 1～6%;
Sylvic acid polyoxyethylene ester: 0.05～0.5%;
Pull open powder: 0.05～0.4%;
Disecoctylmaleate sodium sulfonate: 0.2～1.5%;
Solid chlorous acid acid anhydride: 0.1～0.6%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 0.5～1.5%;
Surplus is that the each weight percentages of components sum of hydration meter is a hundred per cent.
Two, the production method of water injection well in oil fields scale remover:
Major equipment: the acidproof Agitation Tank of belt stirrer.Production method:
First, under normal temperature condition, in the acidproof Agitation Tank of belt stirrer, add water, by sodium acetate, Trisodium Citrate, Seignette salt, Sodium Fluoride, sylvic acid polyoxyethylene ester, pull open powder, seven kinds of compositions in weight percentage of disecoctylmaleate sodium sulfonate are added to the water, stir, produce foam, each component addition sequence is random;
Secondly, under agitation condition, load weighted 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is by weight percentage added in the above-mentioned mixing solutions preparing, stir;
Then, under agitation condition, add load weighted solid chlorous acid acid anhydride by weight percentage, stir;
Finally, under agitation condition, will add load weighted hydrochloric acid by weight percentage, stir, obtain faint yellow transparent water injection well in oil fields scale remover.
The using method of water injection well in oil fields scale remover, first by water injection well emptying pressure release; Deng emptying pressure release just noting with small displacement with pump after completing or anti-the mode of note water injection well in oil fields scale remover is injected to fouling pit shaft (while just note, first open sleeve valve, be connected to blow-down pit or be connected in the tank of dress scale remover with pipeline; When anti-note, open tubing valve, be connected to blow-down pit or be connected in the tank of dress scale remover with pipeline.); After to be cleaned dose of full oil sets annular space and oil pipe, stop injecting, react 2 hours; Reacted rear with the normal well-flushing of clear water, just washing backwash all can, after well-flushing completes, complete scale removal.
Precaution: scale remover of the present invention has faint pungent smell, for avoiding causing in dosing and construction process operator's discomfort, should be with the helmet of good strick precaution sour gas when dosing and construction.
Beneficial effect of the present invention: water injection well in oil fields scale remover of the present invention, carbonate scale, sulfate scale, ferrous sulfide scale, grease, silicate scale etc. in water injection well are carried out to soaking flushing, about two hours, all can complete scale removal; And little to the corrosion of tubing and casing and injection device, to equipment corrosion degree lower than 0.5994mg/cm
2h; Scale removal job safety, does not have H in operation process
2s gas is emitted.
Range of application: water injection well in oil fields scale remover, be applicable to remove all kinds of foulings that water injection well generates in the injecting process, comprise carbonate scale, sulfate scale, ferrous sulfide scale, grease, silicate scale etc.
Embodiment
Embodiment 1: a kind of water injection well in oil fields scale remover, each component effective constituent weight percent is:
Hydrochloric acid (mass concentration 28～38%): 10% (effective constituent is in HCl);
Sodium acetate: 1%;
Trisodium Citrate: 1.5%;
Sodium Fluoride: 1.5%;
Seignette salt: 3%;
Sylvic acid polyoxyethylene ester: 0.5%;
Pull open powder: 0.2%;
Disecoctylmaleate sodium sulfonate: 1%;
Solid chlorous acid acid anhydride: 0.6%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 1.2%;
Water: 79.5%;
Each weight percentages of components sum is absolutely.
A kind of preparation method of water injection well in oil fields scale remover: first, under normal temperature condition, in the acidproof Agitation Tank of belt stirrer, add water, by sodium acetate, Trisodium Citrate, Seignette salt, Sodium Fluoride, sylvic acid polyoxyethylene ester, pull open powder, seven kinds of compositions in weight percentage of disecoctylmaleate sodium sulfonate are added to the water, stir, produce foam, each component addition sequence is random; Secondly, under agitation condition, load weighted 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is by weight percentage added in the above-mentioned mixing solutions preparing, stir; Then, under agitation condition, add load weighted solid chlorous acid acid anhydride by weight percentage, stir; Finally, under agitation condition, will add load weighted hydrochloric acid by weight percentage, stir, obtain faint yellow transparent water injection well in oil fields scale remover.
The fundamental property of embodiment 1:
| Embodiment 1 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.5817 | 94.27 |
Embodiment 1 result of use: the willow 88-48 water injection well fouling of oil field, Jingan County is serious, by analysis, its fouling scale sample ingredient is mainly carbonate scale and ferrous sulfide scale, and contains a small amount of silicate scale and sulfate scale.Carry out scale removal operation with water injection well in oil fields scale remover, use scale remover 30 sides, the engineering time is 2 hours, in construction process without H
2s emits.The normal water filling of rear beginning of having constructed, the 10MPa of water injection pressure before by scale removal drops to 8.5MPa, shows that descale effect is good.
Embodiment 2: water injection well in oil fields scale remover, each component effective constituent weight percent is:
Hydrochloric acid (mass concentration: 28～38%): 15% (effective constituent is in HCl);
Sodium acetate: 0.2%;
Trisodium Citrate: 0.5%;
Sodium Fluoride: 0.1%;
Seignette salt: 2%;
Sylvic acid polyoxyethylene ester: 0.5%;
Pull open powder: 0.4%;
Disecoctylmaleate sodium sulfonate: 1.5%;
Solid chlorous acid acid anhydride: 0.6%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 1.5%;
Water: 77.7%
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 2 is identical with embodiment 1.
The fundamental property of embodiment 2:
| Embodiment 2 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.5994 | 93.41 |
Embodiment 2 results of use: the willow 86-50 well fouling of oil field, Jingan County is serious, dirty sample analysis shows that its fouling scale sample ingredient is mainly carbonate scale and ferrous sulfide scale, and contains a small amount of sulfate scale and grease, and contains micro-silicate scale.Carry out scale removal operation with water injection well in oil fields scale remover, use scale remover 33 sides, the engineering time is 2 hours, in construction process without H
2s emits.The normal water filling of rear beginning of having constructed, the 10MPa of water injection pressure before by scale removal drops to 8.5MPa, shows that descale effect is good.
Embodiment 3: water injection well in oil fields scale remover, each component effective constituent weight percent is:
Hydrochloric acid (mass concentration: 28～38%): 5% (effective constituent is in HCl);
Sodium acetate: 0.1%;
Trisodium Citrate: 0.1%;
Sodium Fluoride: 3%;
Seignette salt: 1%;
Sylvic acid polyoxyethylene ester: 0.5%;
Pull open powder: 0.4%;
Disecoctylmaleate sodium sulfonate: 1.5%;
Solid chlorous acid acid anhydride: 0.1%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 0.5%;
Water: 87.8%;
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 3 is identical with embodiment 1.
The fundamental property of embodiment 3:
| Embodiment 3 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.4112 | 96.87 |
Embodiment 3 results of use: the willow 64-70 well fouling of oil field, Jingan County is serious, dirty sample analysis shows that its fouling scale sample ingredient is mainly carbonate scale, and contains a small amount of grease, and contains micro-silicate scale, sulfate scale and ferrous sulfide scale.Carry out scale removal operation with water injection well in oil fields scale remover, use scale remover 30 sides, the engineering time is 2 hours, in construction process without H
2s emits.The normal water filling of rear beginning of having constructed, the 11MPa of water injection pressure before by scale removal drops to 8.5MPa, shows that descale effect is good.
Embodiment 4: water injection well in oil fields scale remover, each component effective constituent weight percent is:
Hydrochloric acid (mass concentration: 28～38%): 12% (effective constituent is in HCl);
Sodium acetate: 1%;
Trisodium Citrate: 1%;
Sodium Fluoride: 0.1%;
Seignette salt: 1%;
Sylvic acid polyoxyethylene ester: 0.3%;
Pull open powder: 0.1%;
Disecoctylmaleate sodium sulfonate: 0.2%;
Solid chlorous acid acid anhydride: 0.3%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 1.3%;
Water: 82.7%;
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 4 is identical with embodiment 1.
The fundamental property of embodiment 4:
| Embodiment 4 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.5724 | 94.68 |
Embodiment 4 results of use: the fouling of Ansai Oilfield king 27-04 well is serious, dirty sample analysis shows that its fouling scale sample ingredient is mainly carbonate scale, and contains micro-silicate scale, sulfate scale, grease and ferrous sulfide scale.Carry out scale removal operation with water injection well in oil fields scale remover, use scale remover 25 sides, the engineering time is 2 hours, in construction process without H
2s emits.The normal water filling of rear beginning of having constructed, the 10.5MPa of water injection pressure before by scale removal drops to 9MPa, shows that descale effect is good.
Embodiment 5: water injection well in oil fields scale remover, each component effective constituent weight percent is:
Hydrochloric acid, mass concentration: 28～38%:11% (effective constituent is in HCl);
Sodium acetate: 1.2%;
Trisodium Citrate: 1.2%;
Sodium Fluoride: 0.1%;
Seignette salt: 1%;
Sylvic acid polyoxyethylene ester: 0.3%;
Pull open powder: 0.1%;
Disecoctylmaleate sodium sulfonate: 0.2%;
Solid chlorous acid acid anhydride: 0.2%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 1.2%;
Water: 83.5%;
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 5 is identical with embodiment 1.
The fundamental property of embodiment 5:
| Embodiment 5 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.5620 | 94.86 |
Embodiment 5 results of use: the fouling of Ansai Oilfield king 23-01 well is serious, dirty sample analysis shows that its fouling scale sample ingredient is mainly carbonate scale, and contains micro-silicate scale, sulfate scale, grease and ferrous sulfide scale.Carry out scale removal operation with water injection well in oil fields scale remover, use scale remover 25 sides, the engineering time is 2 hours, in construction process without H
2s emits.The normal water filling of rear beginning of having constructed, the 11MPa of water injection pressure before by scale removal drops to 9MPa, shows that descale effect is good.
Comparative example 1: water injection well in oil fields scale remover, and each component effective constituent weight percent is (do not add and pull open powder and disecoctylmaleate sodium sulfonate):
Hydrochloric acid, mass concentration: 28～38%:11% (effective constituent is in HCl);
Sodium acetate: 1.2%;
Trisodium Citrate: 1.2%;
Sodium Fluoride: 0.1%;
Seignette salt: 1%;
Sylvic acid polyoxyethylene ester: 0.6%;
Solid chlorous acid acid anhydride: 0.2%(effective constituent is with ClO
2meter);
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 1.2%;
Water: 83.5%;
Each weight percentages of components sum is absolutely.
Comparative example 1 preparation process is identical with embodiment 1.
Comparative example 1 fundamental property:
| Comparative example 1 | Color | Degree of corrosion (mg/cm 2h) | Corrosion prevention percentage (%) |
| ? | Pale yellow | 0.5620 | 94.86 |
Comparative example's 1 result of use: the fouling of Ansai Oilfield king 24-02 well is serious, water injection pressure is up to 10.5MPa, the analysis of dirt sample shows that its fouling scale sample ingredient is mainly carbonate scale, and contains a small amount of grease and contain micro-silicate scale, sulfate scale and ferrous sulfide scale.The water injection well in oil fields scale remover of preparing with comparative example 1 carries out scale removal operation, uses scale remover 25 sides, and the engineering time is 2 hours, in construction process without H
2s emits.The rear beginning water filling of having constructed, it is higher that water injection pressure still keeps, and descale effect is poor.
Claims (3)
1. water injection well in oil fields scale remover, is characterized in that: the weight percent of each component effective constituent is:
Hydrochloric acid (mass concentration 28～38%): 5～15%;
Sodium acetate: 0.1～1.5%;
Trisodium Citrate: 0.1～1.5%;
Sodium Fluoride: 0.1～8.5%;
Seignette salt: 1～6%;
Sylvic acid polyoxyethylene ester: 0.05～0.5%;
Pull open powder: 0.05～0.4%;
Disecoctylmaleate sodium sulfonate: 0.2～1.5%;
Solid chlorous acid acid anhydride: 0.1～0.6%;
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid: 0.5～1.5%;
Surplus is water, and each weight percentages of components sum is absolutely.
2. the preparation method of water injection well in oil fields scale remover according to claim 1, is characterized in that step is as follows:
First, under normal temperature condition, in the acidproof Agitation Tank of belt stirrer, add measured water by weight percentage, by sodium acetate, Trisodium Citrate, Seignette salt, Sodium Fluoride, sylvic acid polyoxyethylene ester, pull open powder, seven kinds of compositions in weight percentage of disecoctylmaleate sodium sulfonate are added to the water, stir, produce foam, each component addition sequence is random; Secondly,, under agitation condition, load weighted 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is by weight percentage added in the above-mentioned mixing solutions preparing, and stir; Then, under agitation condition, add load weighted solid chlorous acid acid anhydride by weight percentage, stir; Finally, under agitation condition, will add load weighted hydrochloric acid by weight percentage, stir, obtain faint yellow transparent water injection well in oil fields scale remover.
3. the using method of water injection well in oil fields scale remover according to claim 1, is characterized in that first by water injection well emptying pressure release; Deng emptying pressure release just noting with small displacement with pump after completing or anti-the mode of note water injection well in oil fields scale remover is injected to fouling pit shaft, while just note, first open sleeve valve, be connected to blow-down pit or be connected in the tank of dress scale remover with pipeline; When anti-note, open tubing valve, be connected to blow-down pit or be connected in the tank of dress scale remover with pipeline; After to be cleaned dose of full oil sets annular space and oil pipe, stop injecting, react 2 hours; Reacted rear with the normal well-flushing of clear water, just washing backwash all can, after well-flushing completes, complete scale removal.
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| CN105754567A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Water injection well scale remover and preparation method and application thereof |
| CN107652959A (en) * | 2017-09-26 | 2018-02-02 | 天津亿利科能源科技发展股份有限公司 | A kind of oilfield transportation system and the neutral scale remover of flood pattern |
| CN109553200A (en) * | 2018-11-21 | 2019-04-02 | 句容宁武高新技术发展有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof based on modified tannin acid |
| CN109897618A (en) * | 2017-12-07 | 2019-06-18 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of descaling composition, scale remover and preparation method thereof |
| CN113249104A (en) * | 2020-02-13 | 2021-08-13 | 中国石油天然气股份有限公司 | Scale inhibition and scale removal agent and preparation method thereof |
| CN114517661A (en) * | 2020-11-20 | 2022-05-20 | 中国石油天然气股份有限公司 | Method for determining water injection block descaling measures |
| US11746278B1 (en) * | 2022-06-02 | 2023-09-05 | King Fahd University Of Petroleum And | Method of removing sulfide-containing scale |
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