Fracturing fluid, clay anti-swelling agent and preparation method thereof
CN122168262APending Publication Date: 2026-06-09CHINA PETROCHEMICAL KUNSHAN CO LTD +2
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROCHEMICAL KUNSHAN CO LTD
- Filing Date
- 2024-12-09
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
In the existing technology, the synthesis process of cationic polymer clay anti-swelling agents is complex and costly, and high molecular weight products may block rock pores, affect oil and gas seepage channels, and reduce extraction efficiency.
Method used
A C-PAC anti-swelling agent with a small molecular weight was prepared by polymerizing acrylamide with acryloyloxyethyltrimethylammonium chloride. The production process was simplified through specific steps, which reduced production costs and improved the anti-swelling effect.
Benefits of technology
It simplifies the production process, reduces production costs, significantly reduces the risk of reservoir pore blockage and fracturing failure, and improves oil and gas extraction efficiency and economic benefits.
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Smart Images
Figure CN122168262A_ABST
Abstract
This application provides a fracturing fluid, a clay anti-swelling agent, and a preparation method thereof. The preparation method includes providing the following components by weight: 1-5 parts acrylamide; 1-5 parts acryloyloxyethyltrimethylammonium chloride; 0.0001-0.005 parts pH adjuster; 0.0001-0.005 parts first initiator; 0.0001-0.005 parts second initiator; 0.0001-0.005 parts chain transfer agent; and 0.001-1 parts molecular weight regulator. Acrylamide and acryloyloxyethyltrimethylammonium chloride are dissolved in deionized water to adjust the pH. The first initiator, chain transfer agent, and molecular weight regulator are added and stirred until homogeneous. An aqueous solution of the second initiator is added to a third solution to carry out a polymerization reaction, thereby obtaining the clay anti-swelling agent. The preparation method of this application is simple, low-cost, and produces a fracturing fluid with a small molecular weight and good anti-swelling effect. Furthermore, it reduces the risk of formation pore blockage and fracturing fracture failure.
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