CN102321464A - Corrosion and scale inhibitor for oil well in high water-cut period - Google Patents
Corrosion and scale inhibitor for oil well in high water-cut period Download PDFInfo
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- CN102321464A CN102321464A CN201110198619A CN201110198619A CN102321464A CN 102321464 A CN102321464 A CN 102321464A CN 201110198619 A CN201110198619 A CN 201110198619A CN 201110198619 A CN201110198619 A CN 201110198619A CN 102321464 A CN102321464 A CN 102321464A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 52
- 230000007797 corrosion Effects 0.000 title claims abstract description 49
- 239000003129 oil well Substances 0.000 title claims abstract description 34
- 239000002455 scale inhibitor Substances 0.000 title abstract description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- FPIPGXGPPPQFEQ-UHFFFAOYSA-N 13-cis retinol Natural products OCC=C(C)C=CC=C(C)C=CC1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- GULOCPNCHAQGIJ-UHFFFAOYSA-N CSC.C(CCCCCCCCCCC)NCCCC Chemical compound CSC.C(CCCCCCCCCCC)NCCCC GULOCPNCHAQGIJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- FPIPGXGPPPQFEQ-BOOMUCAASA-N Vitamin A Natural products OC/C=C(/C)\C=C\C=C(\C)/C=C/C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-BOOMUCAASA-N 0.000 claims abstract description 12
- FPIPGXGPPPQFEQ-OVSJKPMPSA-N all-trans-retinol Chemical compound OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-OVSJKPMPSA-N 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 12
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 12
- AKUNSPZHHSNFFX-UHFFFAOYSA-M tributyl(tetradecyl)phosphanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCC[P+](CCCC)(CCCC)CCCC AKUNSPZHHSNFFX-UHFFFAOYSA-M 0.000 claims abstract description 12
- 235000019155 vitamin A Nutrition 0.000 claims abstract description 12
- 239000011719 vitamin A Substances 0.000 claims abstract description 12
- 229940045997 vitamin a Drugs 0.000 claims abstract description 12
- 230000002401 inhibitory effect Effects 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 16
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical class 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
- 238000000034 method Methods 0.000 claims description 12
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 210000003298 dental enamel Anatomy 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 230000005764 inhibitory process Effects 0.000 abstract description 24
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003112 inhibitor Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract 1
- WFRXSOIFNFJAFL-UHFFFAOYSA-N P1(OCCCCO1)=O.C(CN)N Chemical compound P1(OCCCCO1)=O.C(CN)N WFRXSOIFNFJAFL-UHFFFAOYSA-N 0.000 abstract 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 6
- 239000013543 active substance Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 231100000053 low toxicity Toxicity 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- -1 silicate ion Chemical class 0.000 description 2
- GUJDUXMBBAOBHN-UHFFFAOYSA-N 6-(dimethylamino)-n-(2h-tetrazol-5-yl)pyrazine-2-carboxamide Chemical compound CN(C)C1=CN=CC(C(=O)NC2=NNN=N2)=N1 GUJDUXMBBAOBHN-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229940120146 EDTMP Drugs 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 150000002461 imidazolidines Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011206 ternary composite Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Lubricants (AREA)
Abstract
The corrosion and scale inhibitor is used for oil wells in a high water-cut period and is applied to corrosion and scale inhibition of oil fields. The weight ratio of each component is as follows: bis-o-methylthiourea: 3.25-4.0%; ethylenediamine tetramethylene phosphonate: 12.5-13.5%; dodecyl butylamine methyl sulfide: 8.0-8.5%; tetradecyltributylphosphonium chloride: 3.0-3.25%; DN-3212 acrylic acid, organophosphine and sulfonic acid copolymer: 15.0-16.2%; M-505A corrosion inhibitor: 5.25 to 5.75 percent; SL-2 series corrosion and scale inhibitor: 6.85-7.25%; methanol: 5.0 to 7.5 percent; urotropin: 3.4-3.75%; vitamin A: 0.05-0.055%; the balance of water, and the sum of the weight percentages of the components is one hundred percent. The effect is as follows: under the condition that the addition amount is 50-60 mg/l, the corrosion inhibition rate of the oil well reaches more than 85%, and the scale inhibition rate reaches more than 90%. The average pump detection period is prolonged by more than 1 time.
Description
Technical field
The present invention relates to oil recovery technique field, oil field, particularly a kind of high water-cut stage oil well corrosion inhibiting and descaling agent that is used for.
Background technology
The oil field gets into high water-cut stage, and because of salinity in the water is high, serious corrosion and scaling phenomenon appears in oil well.Though the technician has taked various control measures, the method difference of taking because of the practical situation in oil field is very big.
Zhang Lianming etc. are published in the development of the oil well corrosion inhibiting and descaling agent on the 6th phase of the calendar year 2001 oil field gas field face engineering and point out that with using a literary composition WS is high in the part oil well output medium of Zhongyuan Oil Field, Ca
2+, Mg
2+, SO
4 2-, HCO
3 -, SO
2And SRB content is high, and the pH value is low, and this output medium has very high corrosion and fouling tendency.Oil well adds unidirectional inhibiter and Scale inhibitors simultaneously; Not only increase production cost but also increase workload, and must solve the compatibility problems of Scale inhibitors and inhibiter, therefore; To influence factors such as oil well burn into foulings, it is significant to study the corrosion inhibiting and descaling agent with inhibition and scale-inhibiting properties.
Waist English table oil field extraction well scale inhibition anti-corrosion technology one literary composition that Wang Rui is published on 2010 the 7th phases oil field gas field face engineering is analyzed oil well fouling mechanism and influence factor according to waist English table oil field reservoir characteristics, fouling characteristic, and works out corresponding clear, scale inhibitor Technology.7 mouthfuls of wells of this technology test in place, average pump detection period is 2 months before the test, take scale inhibition technology after the average inspection pump phase of being excused from a college course reached 8 months, antiscaling effect is remarkable.
Liang Tao has discussed China's onshore oil field major part in the development of Daqing Petroleum Institute's master's Diplomarbeit in 2006 solid slow-release property antiseptic corrosion inhibitor and application and has got into the exploitation middle and later periods; Along with applying of polymer flooding and ternary composite driving, down-hole fouling, etching problem become more and more outstanding.Frequent inspection pump not only influences production capacity production, but also causes the huge waste of maintenance cost.Therefore solve the down-hole fouling and etching problem has become extremely urgent research topic.Develop a kind of solid slow-release property antiseptic corrosion inhibitor, be installed in the oil well pump lower end to it, out-of-date when the extraction flow, it can slowly dissolve, and simultaneously anti-corrosion, scale-inhibiting effective constituent is wherein little by little discharged, and reaches the purpose of inhibition and scale inhibition.And then can avoid oil well pump stuck by dirt layer institute, prolonged pump detection period.Analyzed a variety of causes of oil well produced liquid (being oilfield sewage) fouling in the literary composition.Think that under high pH value situation calcium, mg ion and silicate ion very easily form fouling through processes such as absorption, crystallization, sedimentations; And suitable temperature, slow flow velocity play the effect of acceleration to fouling.Mineral compound commonly used, the scale inhibitor mechanism of organic cpds class Scale inhibitors theoretic analysis and research have been carried out.Through testing the optimum formula of having confirmed solid corrosion and scale inhibitor.Wherein the staple of soluble solids carrier is a Z 150PH, and this material has good solvability in water under 80～90 ℃ of conditions, and dissolution rate is more slow relatively.
Summary of the invention
The objective of the invention is: a kind of high water-cut stage oil well corrosion inhibiting and descaling agent that is used for is provided, is used for high water-cut stage oil well corrosion inhibiting and descaling agent, the oil well corrosion inhibition rate reaches more than 85%, and scale inhibition performance reaches more than 90%.
The technical scheme that the present invention adopts is: the raw material that is used for high water-cut stage oil well corrosion inhibiting and descaling agent comprises:
1, two adjacent methylthioureas (industrial goods), Zhao Fulin chief editor, " course teaching materials geared to the 21st century ", oilfield chemistry, press of China University Of Petroleum Beijing, the 1st edition the 6th printing February in 2007, the 186th page.Manufacturer: the Shijiazhuang grand chemical industry of length ltd.
2, ethylenediamine tetramethylene phosphonic acid salt, popular name: EDTMP (industrial goods), Zhao Fulin chief editor, " chemical agent for oil recovery ", press of University of Petroleum, the 1st edition the 1st printing June in 1997, the 121st page.Manufacturer: the Shijiazhuang grand chemical industry of length ltd.
3, dodecyl butylamine methyl thioether, Zhao Fulin chief editor, " chemical agent for oil recovery ", press of University of Petroleum, the 1st edition the 1st printing June in 1997, the 187th page.Manufacturer: the Shijiazhuang grand chemical industry of length ltd.
4, tetradecyl tributyl phosphonium chloride, another name, sterilant DTPC (industrial goods).(Huang Hongzhou edits " Chinese tensio-active agent overview " book, the 107th page of Chemical Industry Press);
Purposes: efficient, wide spectrum, low dosage, low foaming, low toxicity, glutinous mud is peeled off the sterilant of effect by force.Manufacturer: China PetroChemical Corporation's water treatment centers; Water quality stabilizer factory of Nanjing Chemical Engineering College.
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, another name: DN-3212 (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 287th page of Chemical Industry Press;
Character: having excellent scale inhibition and dispersion performance and corrosion inhibition, is one of present more satisfactory multifunctional anti-incrustation dispersion agent.Low toxicity, chemicalstability is good, under general acid-base condition and high temperature, can not decompose.Purposes: dirt dispersion agent.Manufacturer: Dong Na chemical plant, Wujin city.
6, M-505A inhibiter (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 414th page of Chemical Industry Press; Character: water-soluble type imidazoline amide corrosion inhibitor.
Purposes: the water quick cooling that is used for ethylene cracker is the gun barrel of system but.At the bottom of the soul water stripper and cracking compressor intersegmental cooler, also can be used for normal pressure, vacuum distillation tower overhead condensation recovery system, in case the corrosion of sour gas.Manufacturer: the triumphant strange chemical industry in Shenzhen ltd, the long grand chemical industry in Shijiazhuang ltd.
7, SL-2 series corrosion inhibiting and descaling agent, another name: thiophosphatephosphorothioate imidazolidine derivatives (industrial goods), " Chinese tensio-active agent overview " book of Huang Hongzhou chief editor, the 556th page of Chemical Industry Press); Purposes: the anti-corrosion, scale-inhibiting of oil field produced water system.Manufacturer: Shengli Oil Field chemical technology development company.
8, methyl alcohol;
9, urotropine;
10, vitamin A;
11, water.
Each components by weight that is used for high water-cut stage oil well corrosion inhibiting and descaling agent is:
1, two adjacent methylthioureas (industrial goods): 3.25～4.0%;
2, ethylenediamine tetramethylene phosphonic acid salt (industrial goods): 12.5～13.5%;
3, dodecyl butylamine methyl thioether (industrial goods): 8.0～8.5%;
4, tetradecyl tributyl phosphonium chloride (industrial goods): 3.0～3.25%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer (industrial goods): 15.0～16.2%;
6, M-505A inhibiter (industrial goods): 5.25～5.75%;
7, SL-2 series corrosion inhibiting and descaling agent (industrial goods): 6.85～7.25%;
8, methyl alcohol (industrial goods): 5.0～7.5%;
9, urotropine (industrial goods): 3.4～3.75%;
10, vitamin A (industrial goods): 0.05～0.055%;
11, all the other are water, and each weight percentages of components sum is absolutely.
The working method that is used for high water-cut stage oil well corrosion inhibiting and descaling agent
Major equipment: enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Working method: at first, with four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine methyl thioether, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride by weight adding enamel reaction still.Slowly be warmed up to 65～75 ℃.Secondly, under constantly stirring, add methyl alcohol earlier and answer 10% of add-on, continue to stir after 30 minutes, add DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent more successively by weight proportion, the limit edged stirs; Successively by weight the methyl alcohol that adds under urotropine, vitamin A and the residue, stirred 30 minutes, then at last by weight adding entry; Stir and stop heating after 30 minutes; Stir while cooling off, cool off and be stirred to normal temperature, obtain being used for high water-cut stage oil well corrosion inhibiting and descaling agent.
Summary is used for the method for use of high water-cut stage oil well corrosion inhibiting and descaling agent, adds according to quantity from the oil jacket annular space on time, and field technician and operator are familiar with this work.
Beneficial effect of the present invention: the present invention is used for high water-cut stage oil well corrosion inhibiting and descaling agent, and dosage is under the situation of 50～60mg/l, and the oil well corrosion inhibition rate reaches more than 85%, and scale inhibition performance reaches more than 90%.Average pump detection period prolongs more than 1 times.
Embodiment
Embodiment 1: be used for high water-cut stage oil well corrosion inhibiting and descaling agent, each components by weight is:
1, two adjacent methylthioureas: 3.25%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.5%;
3, dodecyl butylamine methyl thioether: 8.1%;
4, tetradecyl tributyl phosphonium chloride: 3%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 16.2%;
6, M-505A inhibiter: 5.25%;
7, SL-2 series corrosion inhibiting and descaling agent: 7.15%;
8, methyl alcohol: 5%;
9, urotropine: 3.4%;
10, vitamin A: 0.05%;
11, water is 35.1%, and each weight percentages of components sum is absolutely.
Working method: at first, with four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine methyl thioether, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride by weight adding enamel reaction still.Slowly be warmed up to 70 ℃.Secondly, under constantly stirring, add methyl alcohol earlier and answer 10% of add-on, continue to stir after 30 minutes, add DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent more successively by weight proportion, the limit edged stirs; Successively by weight the methyl alcohol that adds under urotropine, vitamin A and the residue, stirred 30 minutes, then at last by weight adding entry; Stir and stop heating after 30 minutes; Stir while cooling off, cool off and be stirred to normal temperature, obtain being used for high water-cut stage oil well corrosion inhibiting and descaling agent.
Dosage is under the situation of 55mg/l, and the oil well corrosion inhibition rate reaches 88%, and scale inhibition performance reaches 92%.
Embodiment 2: working method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.45%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.3%;
3, dodecyl butylamine methyl thioether: 8.2%;
4, tetradecyl tributyl phosphonium chloride: 3.1%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 16%;
6, M-505A inhibiter: 5.35%;
7, SL-2 series corrosion inhibiting and descaling agent: 7.05%;
8, methyl alcohol: 5.5%;
9, urotropine: 3.5%;
10, vitamin A: 0.052%;
11, water is 34.498%.
Dosage is under the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 85%, and scale inhibition performance reaches 95%.
Embodiment 3: working method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.65%;
2, ethylenediamine tetramethylene phosphonic acid salt: 13.2%;
3, dodecyl butylamine methyl thioether: 8.2%;
4, tetradecyl tributyl phosphonium chloride: 3.15%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.6%;
6, M-505A inhibiter: 5.55%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.95%;
8, methyl alcohol: 5.9%;
9, urotropine: 3.6%;
10, vitamin A: 0.052%;
11, water is 34.148%.
Dosage is under the situation of 58mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 93%.
Embodiment 4: working method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 3.85%;
2, ethylenediamine tetramethylene phosphonic acid salt: 12.8%;
3, dodecyl butylamine methyl thioether: 8.1%;
4, tetradecyl tributyl phosphonium chloride: 3.17%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.8%;
6, M-505A inhibiter: 5.65%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.9%;
8, methyl alcohol: 6%;
9, urotropine: 3.7%;
10, vitamin A: 0.054%;
11, water is 33.976%.
Dosage is under the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 92%.
Embodiment 5: working method is identical with embodiment 1, and each weight percentages of components sum is absolutely.
1, two adjacent methylthioureas: 4%;
2, ethylenediamine tetramethylene phosphonic acid salt: 12.5%;
3, dodecyl butylamine methyl thioether: 8.5%;
4, tetradecyl tributyl phosphonium chloride: 3.24%;
5, DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.5%;
6, M-505A inhibiter: 5.75%;
7, SL-2 series corrosion inhibiting and descaling agent: 6.85%;
8, methyl alcohol: 7.3%;
9, urotropine: 3.75%;
10, vitamin A: 0.055%;
11, water is 32.555%.
Dosage is under the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 94%.
Claims (2)
1. one kind is used for high water-cut stage oil well corrosion inhibiting and descaling agent, and it is characterized in that: each components by weight is:
Two adjacent methylthioureas: 3.25～4.0%;
Ethylenediamine tetramethylene phosphonic acid salt: 12.5～13.5%;
Dodecyl butylamine methyl thioether: 8.0～8.5%;
Tetradecyl tributyl phosphonium chloride: 3.0～3.25%;
DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer: 15.0～16.2%;
M-505A inhibiter: 5.25～5.75%;
SL-2 series corrosion inhibiting and descaling agent: 6.85～7.25%;
Methyl alcohol: 5.0～7.5%;
Urotropine: 3.4～3.75%;
Vitamin A: 0.05～0.055%;
All the other are water, and each weight percentages of components sum is absolutely.
2. the working method that is used for high water-cut stage oil well corrosion inhibiting and descaling agent according to claim 1; It is characterized in that: at first, with four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine methyl thioether, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride by weight adding enamel reaction still; Slowly be warmed up to 65～75 ℃; Secondly, under constantly stirring, add methyl alcohol earlier and answer 10% of add-on, continue to stir after 30 minutes, add DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent more successively by weight proportion, the limit edged stirs; Successively by weight the methyl alcohol that adds under urotropine, vitamin A and the residue, stirred 30 minutes, then at last by weight adding entry; Stir and stop heating after 30 minutes; Stir while cooling off, cool off and be stirred to normal temperature, obtain being used for high water-cut stage oil well corrosion inhibiting and descaling agent.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726082A (en) * | 2015-03-27 | 2015-06-24 | 中国石油天然气集团公司 | Organic base scale removing agent applied to three-component compound flooding and preparation method of organic base scale removing agent |
| CN105712504A (en) * | 2014-12-02 | 2016-06-29 | 中国石油天然气股份有限公司 | Corrosion and scale inhibitor for acidic high-temperature gas field water, preparation method and application |
| CN110016670A (en) * | 2019-05-21 | 2019-07-16 | 上海贵通新材料科技有限公司 | Antioxygen corrosion inhibiter |
| CN111620979A (en) * | 2020-04-27 | 2020-09-04 | 中国石油天然气股份有限公司 | Corrosion and scale inhibitor for oil and gas fields and preparation method thereof |
| US11242480B2 (en) | 2017-08-03 | 2022-02-08 | Championx Usa Inc. | Thiol adducts for corrosion inhibition |
| US11339320B2 (en) * | 2016-12-02 | 2022-05-24 | Championx Usa Inc. | Thiol-formyl hemiacetal corrosion inhibitors |
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| WO2001074966A1 (en) * | 2000-03-31 | 2001-10-11 | Imperial Chemical Industries Plc | Maintenance of oil production and refining equipment |
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