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A kind of polymer for acidification diversion, preparation method, acidification diversion agent

A technology of acidification steering and polymer, which is applied in the field of acidification steering agent and acidification steering polymer, which can solve the problems of unsatisfactory temperature resistance of steering acid, achieve good thickening effect, reduce production cost, and wide steering range

Active Publication Date: 2022-02-18
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current viscoelastic surfactants turn to the problem of unsatisfactory acid temperature resistance

Method used

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  • A kind of polymer for acidification diversion, preparation method, acidification diversion agent
  • A kind of polymer for acidification diversion, preparation method, acidification diversion agent
  • A kind of polymer for acidification diversion, preparation method, acidification diversion agent

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preparation example Construction

[0035] The invention provides a method for preparing a polymer for acidification diversion, comprising: under the action of an initiator, polymerizing a monomer to obtain the polymer for acidification diversion; Ammonium chloride, octadecyl dimethyl allyl ammonium chloride, 1-carboxy-N, N-dimethyl-N-methacrylamidopropyl inner salt and acrylamide.

[0036] Preferably, in terms of molar percentage, the monomer consists of 0.43% to 9.75% of methacryloxyethyltrimethylammonium chloride and 0.42% to 1.09% of octadecyldimethylallyl ammonium chloride , 1-carboxy-N, N-dimethyl-N-methacrylamide propyl inner salt 4.52% ~ 19.13% and acrylamide 79.44% ~ 85.29%.

[0037] Preferably, the initiator is 0.10-0.50wt% of the total mass of monomers. Preferably, the initiator is azobisisobutylamidine hydrochloride.

[0038] Preferably, the polymerization reaction temperature is 45-55° C., and the reaction time is 5-7 hours.

[0039] Preferably, the preparation method specifically includes:

[0...

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Abstract

The invention discloses a polymer for acidification diversion, a preparation method, and an acidification diversion agent. The polymer for acidification diversion is obtained by polymerizing a monomer, and the monomer is composed of methacryloyloxyethyltrimethylammonium chloride, It is composed of alkyldimethylallylammonium chloride, 1-carboxy-N, N-dimethyl-N-methacrylamide propyl inner salt and acrylamide; the polymer for acidification diversion has good thermal stability , has strong temperature resistance. The acidification diversion agent obtained by compounding the acidification diversion polymer with the betaine surfactant has a good diversion effect, does not need to add a cross-linking agent, and reduces damage to the reservoir.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a polymer for acidification diversion, a preparation method and an acidification diversion agent. Background technique [0002] Acidizing is an effective method to increase the production of oil and gas wells or the injection of water injection wells. Inject one or several acid liquids or acid mixture liquids into the formation through the wellbore, and use the chemical reaction between the acid and some minerals in the formation to dissolve the connected pores or natural (hydraulic) fracture wall rocks in the reservoir, increasing the pores and fractures. It is a technical measure to increase the production of oil and gas wells or increase the injection of water injection wells. Due to the heterogeneity of the formation, the acid liquid will preferentially enter the areas with high permeability or the least damage to the formation during the injection process. As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/34C08F220/58C08F226/02C09K8/74
CPCC08F220/56C09K8/74C08F2800/10
Inventor 全红平田海洋黄志宇段文猛王金玉陈中豪路强英蒋思龙
Owner SOUTHWEST PETROLEUM UNIV