Temperature-resistant and salt-resistant multi-component copolymerized pre-crosslinked gel particles and its preparation method and application

A multi-component copolymerization, temperature-resistant and salt-resistant technology, which is applied in the fields of petroleum exploration, transportation and chemical industry, can solve the problem of unstable structure of pre-crosslinked gel particle crosslinking agent, low polymer chain content and molecular weight, and difficulty in meeting the spread of oil reservoirs. Volume and other issues, to achieve the effect of effectively controlling the reaction rate, high molecular weight, and conducive to chain growth
CN112279963BActive Publication Date: 2021-03-09山东聚星石油科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
山东聚星石油科技有限公司
Publication Date
2021-03-09

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Abstract

The invention proposes a temperature-resistant and salt-resistant multi-component copolymerized pre-crosslinked gel particle and its preparation method and application, which belong to the technical fields of petroleum exploitation, transportation and chemical industry. The pre-crosslinked gel particles provided by the present invention are formed by the copolymerization of acrylamide and 2-acrylamide-2-methylpropanesulfonic acid. The copolymer has a stable structure, good high-temperature aging resistance, is not easy to hydrolyze, and has good contact with polymers. The compatibility of the system greatly increases the viscosity of the system, improves the suspension performance of the pre-crosslinked gel particles in the system, and makes the oil displacement capacity of the system stronger and the oil displacement efficiency higher.
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Description

technical field

[0001] The invention belongs to the technical fields of petroleum exploitation, transportation and chemical industry, and relates to a temperature-resistant and salt-resistant multi-component copolymerized pre-crosslinked gel particle and a preparation method and application thereof. Background technique

[0002] Polymer flooding is one of the earliest developed tertiary oil recovery technologies, and now it is the most mature technology of chemical flooding tertiary oil recovery, and has been widely used in oilfields at home and abroad. After polymer flooding, the ultimate recovery rate of the oil reservoir can reach 40%~50%, and more than 50% of the remaining oil still needs to be developed urgently, and the reservoir recovery potential is still very large.

[0003] The pre-crosslinked body is a new type of polymer material, which does not dissolve in water, but swells into micron particles with certain viscoelastic properties. In recent years, it has been...

Claims

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