CN102020978A - Gas well corrosion inhibitor and preparation method thereof - Google Patents
Gas well corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN102020978A CN102020978A CN2010106002553A CN201010600255A CN102020978A CN 102020978 A CN102020978 A CN 102020978A CN 2010106002553 A CN2010106002553 A CN 2010106002553A CN 201010600255 A CN201010600255 A CN 201010600255A CN 102020978 A CN102020978 A CN 102020978A
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- gas well
- oil gas
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- fatty acid
- well inhibiter
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Abstract
The invention discloses a gas well corrosion inhibitor and a preparation method thereof. The gas well corrosion inhibitor comprises the following components in percentage by mass: 20-30% of gemini-imidazoline surfactant, 10-15% of fatty alcohol polyoxyethylene ether phosphate, 5-10% of polyether demulsifier, 10-25% of fatty acid amide borate and 20-30% of solvent. The preparation method comprises the following steps: A, adding the gemini-imidazoline surfactant and fatty alcohol polyoxyethylene ether phosphate into a stainless steel agitated reactor, heating to about 75 DEG C, stirring for 30-40 minutes; B, adding the fatty acid amide borate and the polyether demulsifier to the agitated reactor, and stirring for 20-30 minutes; and C, finally adding the solvent to the agitated reactor and stirring for 30 minutes. The gas well corrosion inhibitor can form a firm adsorbed film and drainage protecting film on the surface of the metal so as to prevent the transferring of charges or substances related to corrosion reaction, has excellent capability of overcoming local corrosion and inhibiting pitting corrosion, and can solve the problem of oil-water emulsification and compatibility of the demulsifier, fungicide and an antisludging agent.
Description
Technical field
The present invention relates to the oil-gas mining technical field, be specifically related to a kind of oil gas well inhibiter and preparation method thereof.
Technical background
Adopting inhibiter anticorrosion is the effective supplementary means of material rot-resistant in the exploitation of oil-gas field, is a kind of economy, convenience, guard technology and sfgd. efficiently.
At present, domestic oil-gas field mostly adopts inhibiter anticorrosion, though these inhibiter are widely applied at the scene, and obtain certain preservative effect, but have the following disadvantages: (1) is because these inhibiter are not strong to the specific aim of corrosive environment (corrosive medium) at present, therefore protection effect is not outstanding, in workover treatment, find many oil gas wells, the oil pipe that trips out is damaged by corrosion, the slight corrosion that has, the local corrosion that has, the most serious is the wall erosion attenuate, and the part is caused oil pipe string to break by havoc and falls in the well, influence and restricted the ordinary production of oil-gas field.(2) use the back that oil-water emulsion takes place, cause oil-line plugging on the one hand, crude oil demulsification dehydration is increased difficulty.(3) bad with the compatibleness of emulsion splitter, sterilant, Scale inhibitors.
For solving above-mentioned deficiency of the prior art, the invention provides a kind of new solution.
Summary of the invention
Technical problem to be solved by this invention is: at oil-gas field H
2S-CO
2-CL
-The corrosive medium situation, how a kind of oil gas well inhibiter and preparation method thereof is provided, this oil gas well inhibiter can effectively solve oil-water emulsion and with the compatibleness problem of emulsion splitter, sterilant, Scale inhibitors.
To achieve the above object of the invention, the technical solution adopted in the present invention is: a kind of oil gas well inhibiter is provided, it is characterized in that: each component and mass percent thereof that described oil gas well inhibiter comprises are as follows:
Shuangzi imidazoline surfactant 20%～30%;
Aliphatic alcohol polyoxyvinethene phosphate 10%～15%;
Polyether demulsification agent 5%～10%;
Fatty acid amide boric acid ester 10%～25%;
Solvent 20%～30%.
According to oil gas well inhibiter provided by the present invention, it is characterized in that: described Shuangzi tetrahydroglyoxaline Gemini surface active agent is meant Shuangzi tetrahydroglyoxaline cats product, and its chemical structure is as follows
Wherein, R
1Be the alkyl of carbon containing 12-14, R
2Alkyl for carbon containing 6-8.
According to oil gas well inhibiter provided by the present invention, it is characterized in that: the chemical structural formula of described aliphatic alcohol polyoxyvinethene phosphate is:
Wherein, R
3Be the alkyl of carbon containing 12-14, n=6-8.
According to oil gas well inhibiter provided by the present invention, it is characterized in that: described polyether demulsification agent is meant polyoxyethylene polyoxypropylene glycol ethers interlinkage type emulsion splitter POI-2420.
According to oil gas well inhibiter provided by the present invention, it is characterized in that: described fatty acid amide boric acid ester is meant octadecenic acid diethanolamine boric acid ester.
According to oil gas well inhibiter provided by the present invention, it is characterized in that: described solvent is methyl alcohol, ethanol or soft water.
The preparation method of above-mentioned oil gas well inhibiter comprises the steps:
A, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate are added in the stainless steel cauldron, be heated to about 75 ℃, stir 30min～40min;
B, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min;
C, add stirring solvent 30min at last.
In sum, oil gas well inhibiter provided by the present invention can form firm adsorption film and hydrophobic protective membrane in the metallic surface, hinders the electric charge relevant with corrosion reaction or the transfer of material, effectively slows down to contain H
2S, CO
2, the device such as oil and gas pipeline, tubing and casing, compressor station interchanger, disposing polluted water in oil system and re-injection water system of bittern and the uniform corrosion of equipment, have the good ability that overcomes local corrosion, inhibition point corruption; Sulphide stress corrosion to high-strength steel also has good inhibition effect.When the add-on of this oil gas well inhibiter was 100mg/L, corrosion inhibition rate can reach more than 95%.
Embodiment
Below in conjunction with specific embodiment the specific embodiment of the present invention is described in detail:
Each component and mass percent thereof that oil gas well inhibiter provided by the present invention comprises are as follows:
Shuangzi imidazoline surfactant 20%～30%;
Aliphatic alcohol polyoxyvinethene phosphate 10%～15%;
Polyether demulsification agent 5%～10%;
Fatty acid amide boric acid ester 10%～25%;
Solvent 20%～30%.
Described Shuangzi tetrahydroglyoxaline Gemini surface active agent is meant Shuangzi tetrahydroglyoxaline cats product, and its chemical structure is as follows
Wherein, R
1Be the alkyl of carbon containing 12-14, R
2Alkyl for carbon containing 6-8.The chemical structural formula of described aliphatic alcohol polyoxyvinethene phosphate is:
Wherein, R
3Be the alkyl of carbon containing 12-14, n=6-8.
Described polyether demulsification agent is meant polyoxyethylene polyoxypropylene glycol ethers interlinkage type emulsion splitter POI-2420.Described fatty acid amide boric acid ester is meant octadecenic acid diethanolamine boric acid ester.Described solvent is methyl alcohol, ethanol or soft water.
The preparation method of above-mentioned oil gas well inhibiter comprises the steps: A, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate is added in the stainless steel cauldron, is heated to about 75 ℃, stirs 30min～40min; B, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min; C, add stirring solvent 30min at last.
Embodiment 1:
300kg Shuangzi imidazoline surfactant; The 150kg aliphatic alcohol polyoxyvinethene phosphate; The 100kg polyether demulsification agent; 250kg fatty acid amide boric acid ester; The 300kg solvent.
According to formula rate, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate are added in the stainless steel cauldron, be heated to about 75 ℃, stir 30min～40min, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min, add stirring solvent 30min at last.
Embodiment 2:
Shuangzi imidazoline surfactant 200kg; The 100kg aliphatic alcohol polyoxyvinethene phosphate; The 50kg polyether demulsification agent; 100kg fatty acid amide boric acid ester; 200kg solvent (alcohols or other polar solvent).
According to formula rate, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate are added in the stainless steel cauldron, be heated to about 75 ℃, stir 30min～40min, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min, add stirring solvent 30min at last.
Embodiment 3:
250kg Shuangzi imidazoline surfactant; The 120kg aliphatic alcohol polyoxyvinethene phosphate; The 80kg polyether demulsification agent; 180kg fatty acid amide boric acid ester; The 250kg solvent.
According to formula rate, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate are added in the stainless steel cauldron, be heated to about 75 ℃, stir 30min～40min, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min, add stirring solvent 30min at last.
Preservative effect with regard to the prepared oil gas well inhibiter of 3 embodiment proves by experiment below, and concrete experiment condition is:
Appreciation condition
Salinity: according to the analytical results of on-the-spot output water, with NaCL, NaHCO
3, CaCL
2, MgCL
2.6H
2O, Na
2SO
4The preparation total mineralization is the mineralized water of 105g/L;
Estimate pressure: stagnation pressure 16.0Mpa, CO
2Dividing potential drop 0.48Mpa, H
2S dividing potential drop 0.21Mpa;
Evaluation temperature: 60 ℃;
Flow velocity: 3m/s;
Test piece material: L360;
Test period 72h.
Test-results
The corrosion inhibition test-results of this oil gas well inhibiter is as shown in table 1.
Table 1
In sum, oil gas well inhibiter provided by the present invention can form firm adsorption film and hydrophobic protective membrane in the metallic surface, hinders the electric charge relevant with corrosion reaction or the transfer of material, effectively slows down to contain H
2S, CO
2, the device such as oil and gas pipeline, tubing and casing, compressor station interchanger, disposing polluted water in oil system and re-injection water system of bittern and the uniform corrosion of equipment, have the good ability that overcomes local corrosion, inhibition point corruption; Sulphide stress corrosion to high-strength steel also has good inhibition effect.Under above-mentioned experiment condition, when the add-on of this oil gas well inhibiter was 100mg/L, corrosion inhibition rate reached more than 95%.
Though in conjunction with specific embodiments the specific embodiment of the present invention is described in detail, be not to be qualification to this patent protection domain.In claims institute restricted portion, various modifications that those skilled in the art can make without creative work or adjust the protection that still is subjected to this patent.
Claims (7)
1. oil gas well inhibiter, it is characterized in that: each component and mass percent thereof that described oil gas well inhibiter comprises are as follows:
Shuangzi imidazoline surfactant 20%～30%;
Aliphatic alcohol polyoxyvinethene phosphate 10%～15%;
Polyether demulsification agent 5%～10%;
Fatty acid amide boric acid ester 10%～25%;
Solvent 20%～30%.
2. oil gas well inhibiter according to claim 1 is characterized in that: described Shuangzi tetrahydroglyoxaline Gemini surface active agent is meant Shuangzi tetrahydroglyoxaline cats product, and its chemical structure is as follows
Wherein, R
1Be the alkyl of carbon containing 12-14, R
2Alkyl for carbon containing 6-8.
3. oil gas well inhibiter according to claim 1, it is characterized in that: the chemical structural formula of described aliphatic alcohol polyoxyvinethene phosphate is:
Wherein, R
3Be the alkyl of carbon containing 12-14, n=6-8.
4. oil gas well inhibiter according to claim 1 is characterized in that: described polyether demulsification agent is meant polyoxyethylene polyoxypropylene glycol ethers interlinkage type emulsion splitter POI-2420.
5. oil gas well inhibiter according to claim 1 is characterized in that: described fatty acid amide boric acid ester is meant octadecenic acid diethanolamine boric acid ester.
6. oil gas well inhibiter according to claim 1 is characterized in that: described solvent is methyl alcohol, ethanol or soft water.
7. the preparation method of a claim 1,2,3,4,5 or 6 described oil gas well inhibiter, it is characterized in that: described preparation method comprises the steps:
A, Shuangzi imidazoline surfactant, aliphatic alcohol polyoxyvinethene phosphate are added in the stainless steel cauldron, be heated to about 75 ℃, stir 30min～40min;
B, add fatty acid amide boric acid ester and polyether demulsification agent again, stir 20min～30min;
C, add stirring solvent 30min at last.
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|---|---|---|---|
| CN2010106002553A CN102020978A (en) | 2010-12-22 | 2010-12-22 | Gas well corrosion inhibitor and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102533237A (en) * | 2012-01-12 | 2012-07-04 | 广州市振科科技有限公司 | Preparation method of novel organic amine adsorbed film type corrosion inhibitor for oil field |
| CN103059825A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Corrosion inhibitor for oil wells and preparation method |
| CN103951702A (en) * | 2014-05-09 | 2014-07-30 | 齐齐哈尔大学 | 1,1'-dialkyl-3,3'-(2-phosphate-1,3-propylidene)imidazolium compound and preparation method thereof |
| CN105220157A (en) * | 2015-08-27 | 2016-01-06 | 中国石油天然气股份有限公司 | A kind of outfit method protecting liquid and protection liquid |
| CN111020595A (en) * | 2019-12-12 | 2020-04-17 | 浙江杭化科技股份有限公司 | Corrosion inhibitor for cracking gas compressor of ethylene device |
| CN114457344A (en) * | 2021-09-26 | 2022-05-10 | 中海油(天津)油田化工有限公司 | Water-based cleaning agent for cleaning offshore oil well pipe column and preparation method thereof |
-
2010
- 2010-12-22 CN CN2010106002553A patent/CN102020978A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059825A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Corrosion inhibitor for oil wells and preparation method |
| CN103059825B (en) * | 2011-10-18 | 2015-02-18 | 中国石油化工股份有限公司 | Corrosion inhibitor for oil wells and preparation method |
| CN102533237A (en) * | 2012-01-12 | 2012-07-04 | 广州市振科科技有限公司 | Preparation method of novel organic amine adsorbed film type corrosion inhibitor for oil field |
| CN102533237B (en) * | 2012-01-12 | 2014-04-30 | 广州市振科科技有限公司 | Preparation method of novel organic amine adsorbed film type corrosion inhibitor for oil field |
| CN103951702A (en) * | 2014-05-09 | 2014-07-30 | 齐齐哈尔大学 | 1,1'-dialkyl-3,3'-(2-phosphate-1,3-propylidene)imidazolium compound and preparation method thereof |
| CN105220157A (en) * | 2015-08-27 | 2016-01-06 | 中国石油天然气股份有限公司 | A kind of outfit method protecting liquid and protection liquid |
| CN105220157B (en) * | 2015-08-27 | 2018-03-09 | 中国石油天然气股份有限公司 | A kind of protection liquid matches somebody with somebody Preparation Method with protection liquid |
| CN111020595A (en) * | 2019-12-12 | 2020-04-17 | 浙江杭化科技股份有限公司 | Corrosion inhibitor for cracking gas compressor of ethylene device |
| CN111020595B (en) * | 2019-12-12 | 2021-10-08 | 浙江杭化科技股份有限公司 | Corrosion inhibitor for cracking gas compressor of ethylene device |
| CN114457344A (en) * | 2021-09-26 | 2022-05-10 | 中海油(天津)油田化工有限公司 | Water-based cleaning agent for cleaning offshore oil well pipe column and preparation method thereof |
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Application publication date: 20110420 |