CN102321464B - 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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- 238000005260 corrosion Methods 0.000 title claims abstract description 52
- 230000007797 corrosion Effects 0.000 title claims abstract description 50
- 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
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 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 12
- 238000005516 engineering process Methods 0.000 description 5
- 239000013543 active substance Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003208 petroleum Substances 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
- 239000000203 mixture Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000011084 recovery 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
- 239000007788 liquid Substances 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
- 238000012360 testing method Methods 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
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol 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
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 150000002461 imidazolidines Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol 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 the oil extraction in oil field technical field, particularly a kind of for high water-cut stage oil well corrosion inhibiting and descaling agent.
Background technology
The oil field enters high water-cut stage, and because salinity in the water is high, serious corrosion and scaling phenomenon appears in oil well.Although the technician has taked various control measures, the method difference of taking because of the practical situation in oil field is very large.
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 formation water salinity is high in the some oil wells 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, for influence factors such as oil well corrosion and scalings, it is significant to study the corrosion inhibiting and descaling agent with inhibition and scale-inhibiting properties.
Wang Rui is published in the oil field produced well scale inhibition anticorrosion of waist English platform Technology one literary composition on the 7th phase oil field gas field face engineering in 2010 and according to waist English platform oilfield reservoir characteristics, fouling feature oil well fouling mechanism and influence factor is analyzed, 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 technique 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 antiseptic corrosion inhibitor and application and has entered the exploitation middle and later periods, along with applying of polymer flooding and ternary composite driving, downhole scaling, etching problem become more and more outstanding.Examine frequently pump, not only affect production capacity production, but also cause the huge waste of maintenance cost.Therefore solve downhole scaling and etching problem has become extremely urgent research topic.Develop a kind of solid slow-release antiseptic corrosion inhibitor, it is installed in the oil well pump lower end, when Produced Liquid flow through, it can slowly dissolve, and simultaneously anti-corrosion, scale-inhibiting effective constituent was wherein little by little discharged, and reached 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 in high pH value situation calcium, magnesium ion and silicate ion very easily form fouling by 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 compound class Scale inhibitors theoretic analysis and research have been carried out.Be determined by experiment the optimum formula of solid corrosion and scale inhibitor.Wherein the main component of soluble solids carrier is polyvinyl alcohol, and this material has good solvability in water under 80～90 ℃ of conditions, and dissolution rate is relatively slow.
Summary of the invention
The objective of the invention is: provide a kind of for high water-cut stage oil well corrosion inhibiting and descaling agent, be 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 solution used in the present invention 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 company limited.
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 company limited.
3, dodecyl butylamine Dimethyl sulfide, 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 company limited.
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, chemical stability is good, can not decompose under general acid-base condition and high temperature.Purposes: dirt dispersion agent.Manufacturer: Wujin County, Jiangsu Province Dong Na chemical plant.
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 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 company limited, the long grand chemical industry in Shijiazhuang company limited.
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 Dimethyl sulfide (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 production method that is used for high water-cut stage oil well corrosion inhibiting and descaling agent
Major equipment: the enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Production method: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight.Slowly be warmed up to 65～75 ℃.Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
Summary is used for the using method 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 in 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 Dimethyl sulfide: 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.
Production method: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight.Slowly be warmed up to 70 ℃.Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
Dosage is in the situation of 55mg/l, and the oil well corrosion inhibition rate reaches 88%, and scale inhibition performance reaches 92%.
Embodiment 2: production 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 Dimethyl sulfide: 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 in the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 85%, and scale inhibition performance reaches 95%.
Embodiment 3: production 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 Dimethyl sulfide: 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 in the situation of 58mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 93%.
Embodiment 4: production 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 Dimethyl sulfide: 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 in the situation of 60mg/l, and the oil well corrosion inhibition rate reaches 86%, and scale inhibition performance reaches 92%.
Embodiment 5: production 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 Dimethyl sulfide: 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 in 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 Dimethyl sulfide: 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 production method for high water-cut stage oil well corrosion inhibiting and descaling agent according to claim 1, it is characterized in that: at first, four kinds of raw materials such as two adjacent methylthioureas, dodecyl butylamine Dimethyl sulfide, ethylenediamine tetramethylene phosphonic acid salt, tetradecyl tributyl phosphonium chloride are added enamel reaction still by weight; Slowly be warmed up to 65～75 ℃; Secondly, add first methyl alcohol and answer 10% of add-on under constantly stirring, continue to stir after 30 minutes, add by weight proportion successively DN-3212 vinylformic acid, organic phosphine and sulfonic acid copolymer, M-505A inhibiter, SL-2 series corrosion inhibiting and descaling agent again, the limit edged stirs; Then add by weight successively the methyl alcohol under urotropine, vitamin A and the residue, stirred 30 minutes, add by weight at last entry, stir stopped heating after 30 minutes, stir while cooling off, cool off and be stirred to normal temperature, obtain for high water-cut stage oil well corrosion inhibiting and descaling agent.
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| CN105712504B (en) * | 2014-12-02 | 2018-08-10 | 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 |
| CN104726082B (en) * | 2015-03-27 | 2018-05-15 | 中国石油天然气集团公司 | A kind of organic base descaling agent applied to ternary composite driving and preparation method thereof |
| EP3548582A1 (en) * | 2016-12-02 | 2019-10-09 | Ecolab USA Inc. | Thiol-formyl hemiacetal corrosion inhibitors |
| MX2020001345A (en) | 2017-08-03 | 2020-03-12 | Ecolab Usa Inc | Thiol adducts for corrosion inhibition. |
| CN110016670B (en) * | 2019-05-21 | 2021-06-22 | 上海贵通新材料科技有限公司 | Antioxidant corrosion inhibitor |
| 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 |
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| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
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