Hydrophobically associated type cation acid solution retardant and preparation method thereof

A cationic acid, hydrophobic association technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as limited application scope, and achieve good compatibility, high yield, and good retardation performance.

Inactive Publication Date: 2015-10-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, viscous acid is sensitive to hydrogen sulfide, and its application range is limited.

Method used

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  • Hydrophobically associated type cation acid solution retardant and preparation method thereof
  • Hydrophobically associated type cation acid solution retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A kind of preparation method of hydrophobic association type cationic acid liquid retarder

[0016] Add 3.52g of allyl polyoxyethylene ether APEG-1000 into a 150mL flask, add 65.73 of deionized water, then add 5.00g of acrylamide AM, after the dissolution is complete, add 2.92g of methacryloxy Ethyltrimethylammonium chloride DMC, after dissolving completely, add 0.16g of hexadecyldimethylallyl ammonium chloride DMAAC-16 to obtain a solution with a monomer mass percentage concentration of 15%, and then add Initiator azobisisobutylamidine hydrochloride 0.024g, after dissolving completely, react at a temperature of 50°C for 6h to obtain a gel-like product, which is washed and purified with absolute ethanol for 3 times, and the product is dried in an oven at a temperature of 50°C After medium drying for 24 hours, the acid retarder was prepared.

Embodiment 2

[0017] Embodiment 2 A kind of preparation method of hydrophobic association type cationic acid liquid retarder

[0018] Add 8.80g of allyl polyoxyethylene ether APEG-1000 into a 200mL flask, add 115.32g of deionized water, then add 5.00g of acrylamide AM, after the dissolution is complete, add 6.39g of methacrylamide Oxyethyl trimethyl ammonium chloride DMC, after dissolving completely, add the hexadecyl dimethyl allyl ammonium chloride DMAAC-16 of 0.16g, obtain the solution that monomer mass percent concentration is 15%, then Add 0.061 g of initiator azobisisobutylamidine hydrochloride, after the dissolution is complete, react at a temperature of 50°C for 6 hours to obtain a gel-like product, which is washed and purified with absolute ethanol for 3 times, and the product is heated at a temperature of 50°C After drying in an oven for 24 hours, the acid retarder is prepared.

Embodiment 3

[0019] Embodiment 3 A kind of preparation method of hydrophobic association type cationic acid liquid retarder

[0020] Add 1.76g of allyl polyoxyethylene ether APEG-1000 into a 100mL flask, add 58.14g of deionized water, then add 5.00g of acrylamide AM, after the dissolution is complete, add 3.29g of methacrylamide Oxyethyl trimethyl ammonium chloride DMC, after dissolving completely, add the hexadecyl dimethyl allyl ammonium chloride DMAAC-16 of 0.21g, obtain the solution that monomer mass percent concentration is 15%, then Add 0.041 g of initiator azobisisobutylamidine hydrochloride, after the dissolution is complete, react at a temperature of 50°C for 6 hours to obtain a gel-like product, which is washed and purified with absolute ethanol for 3 times, and the product is heated at a temperature of 50°C After drying in an oven for 24 hours, the acid retarder is prepared.

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Abstract

The invention relates to a hydrophobically associated type cation acid solution retardant for oil gas well acidification in petroleum industry and a preparation method thereof. According to the invention, a retarded acid is utilized for acidifying deep parts of the stratum, in order to improve the acid treatment effect. The technical scheme is as follows: the acid solution retardant is polymerized from four monomers, including acrylamide AM, allylpolyoxyethylene ether APEG-1000, methacryloxyethyltrimethyl ammonium chloride DMC, and cetyl dimethyl diallyl ammonium chloride DMAAC-16. The method of preparation is as follows: adding APEG-1000 whose mole percent is 2.00-8.00% into a flask, adding water 50.00-150.00g, carrying out stirring and dissolving, adding materials in percentage by mole including 63.40-79.60% of AM, 15.80-28.25% of DMC and 0.30-0.70% of DMAAC-16, and obtaining a solution whose concentration is 15%; finally adding an initiator, allowing reaction for 6 hours at 50 DEG C, carrying out washing by ethanol and drying, and obtaining the acid solution retardant. The retardant has a good retardance performance, so that deposition is not easy to be produced, and the retardant has good heat stability, good temperature tolerance and compatibleness.

Description

technical field [0001] The invention relates to a hydrophobic association type cationic acid retarder used in the acidizing operation of oil and gas wells in the petroleum and natural gas industry and a preparation method thereof. Background technique [0002] Acidizing is one of the important production stimulation measures for oil and gas reservoirs. It is a production stimulation measure that uses acid liquid to remove pollution near the bottom of production wells and injection wells, restore formation permeability or dissolve formation rock cement to increase formation permeability. Its purpose is to use acid to relieve the damage caused to the formation near the wellbore during the process of drilling, well completion, well workover and enhanced injection, and dredge the fluid seepage channel, so as to restore and increase the productivity of oil and gas wells. At present, according to the method and purpose of acidizing construction, the acidizing process can be divid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C08F283/06C08F220/56C08F220/34C08F226/02
CPCC09K8/725C08F283/06C09K8/74C08F220/56
Inventor 全红平吴洋黄志宇张太亮王金玉
Owner SOUTHWEST PETROLEUM UNIV
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