Temperature-responsive self-lubricating hydrogel profile control agent and preparation method thereof

A hydrogel profile control agent and temperature-responsive technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor deep profile control effect and low water flooding wave efficiency, and achieve strong temperature resistance , The preparation method is simple, the effect of high plugging strength
CN111534293AActive Publication Date: 2020-08-14YANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YANGZHOU UNIV
Publication Date
2020-08-14

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Abstract

The invention discloses a temperature-responsive self-lubricating hydrogel profile control agent and a preparation method thereof. By a one-pot process, in a water environment, a hydrophilic polymer matrix undergoes an amide-hydroxyl dehydration condensation chemical cross-linking reaction under the action of a cross-linking agent A to generate a high-strength temperature-resistant polymer network, meanwhile, the furfuryl amine-bisphenol A diglycidyl ether oligomer undergoes a Diels-Alder chemical cross-linking reaction under the action of a cross-linking agent B to generate a dynamic covalentnetwork, and the two networks are compounded to generate the temperature-responsive self-lubricating hydrogel profile control agent. The profile control agent has good temperature resistance and self-lubricating performance at the same time, and therefore the problems that the gel profile control agent is poor in deep profile control effect and low in water flooding sweep efficiency due to high friction resistance in a high-temperature oil reservoir are solved.
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Description

technical field

[0001] The invention belongs to the field of petroleum exploitation, and relates to a temperature-responsive self-lubricating hydrogel profile control agent and a preparation method and application thereof. Background technique

[0002] Reservoir heterogeneity is one of the main reasons restricting its water flooding efficiency. With the prolongation of the water flooding time, the crude oil in the shallow formation is gradually displaced, and the permeability of the formation increases significantly, forming a high permeability layer, resulting in a larger gap in permeability between formations at different depths, and the subsequent water flow often passes through the high permeability layer. Layer formation channeling, seriously restricting the effect of oil recovery enhancement. To solve this problem, researchers have developed a variety of materials to seal the high-permeability layer, among which gel is the most cost-effective. At present, the commonl...

Claims

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