Instant low molecular weight polymer for oil recovery and its preparation method
By using fast-dissolving low-molecular-weight polymers in tertiary oil recovery, and introducing functional monomers and surfactants, the problem of slow polymer dissolution was solved, enabling rapid dissolution and efficient construction, reducing costs and improving recovery rates.
CN122103447APending Publication Date: 2026-05-29黑龙江吉地油田服务股份有限公司
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 黑龙江吉地油田服务股份有限公司
- Filing Date
- 2026-02-02
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Polymer products used in existing tertiary oil recovery systems dissolve and swell rapidly when exposed to water, forming a gel layer that causes "fish eyes" or clumps, prolonging on-site operation time and increasing operating costs.
Method used
The method employs fast-dissolving low-molecular-weight polymers and introduces functional monomers and surfactants to enhance the polymer's hydrophilicity, enabling it to dissolve rapidly in a short time and preventing the formation of a gel layer.
Benefits of technology
It enables "instant mixing and injection" at the oilfield site, improving construction efficiency, reducing equipment and time costs, and increasing crude oil recovery rate.
✦ Generated by Eureka AI based on patent content.
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Abstract
The application belongs to the technical field of oil and gas exploitation, and particularly relates to a kind of fast-dissolving low-molecular polymer for oil extraction and a preparation method thereof. 1. Acrylamide, urea, No. 1 functional monomer, No. 2 functional monomer, No. 1 surfactant, No. 2 surfactant and deionized water are mixed and stirred in a reaction container, and then adjusted to a neutral solution; 2. The neutral solution is introduced into an adiabatic polymerization kettle, nitrogen is introduced, No. 1 initiator is added into the polymerization kettle, No. 2 initiator is added after 5 minutes, and No. 3 initiator is added after another 5 minutes. After 3-5 hours of reaction, a polymer glue block is obtained; 3. The polymer glue block is hydrolyzed at a temperature of 50-80℃ for 3-7 hours, then dried in an oven at a temperature of 40-60℃ for 6-12 hours, and then crushed and sieved with a standard sieve of 20-80 mesh to obtain a dry powder of the fast-dissolving low-molecular polymer for oil extraction. The application effectively solves the problem of slow dissolution of ordinary polymers, improves the construction efficiency, and reduces the equipment and time costs.
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