A polymer microsphere water plugging profile control agent and preparation method thereof

A water profile control agent and polymer technology, applied in the field of polymer microsphere water plugging profile control agent and its preparation, can solve the problems of poor plugging effect, poor stability of profile control agent, easy deformation, etc.

Active Publication Date: 2022-05-27
ZHENGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two profile control agents have poor stability, especially under the condition of high salinity, the stability time is short, easy to deform in actual operation, produce precipitation, poor plugging effect, and affect the recovery of crude oil

Method used

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  • A polymer microsphere water plugging profile control agent and preparation method thereof
  • A polymer microsphere water plugging profile control agent and preparation method thereof
  • A polymer microsphere water plugging profile control agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a polymer microsphere water plugging and profile control agent. The weight parts of each component are shown in Table 1. The main ingredients are: 25 parts of acrylamide, 12 parts of isooctyl acrylate, and 10 parts of N-vinylpyrrolidone. The additives are: 3 parts of surfactant, 8 parts of bentonite, and 2 parts of calcium carbonate. The surfactant is a mixture of alkyl dimethyl betaine and fatty acid sorbitan; the weight ratio of alkyl dimethyl betaine: fatty acid sorbitan is 1:0.3. The cross-linking agent is the cross-linking agent JL-1. The dispersion stabilizer is acryloyloxyethyltrimethylammonium chloride. The initiator is azobisisobutyramidine hydrochloride.

Embodiment 2

[0040] This embodiment provides a polymer microsphere water plugging profile control agent, the weight parts of each component are shown in Table 1, wherein the main ingredients are: 26 parts of acrylamide, 13 parts of isooctyl acrylate, 11 parts of N-vinylpyrrolidone 3.5 parts of surfactant, 10 parts of bentonite, and 2.2 parts of calcium carbonate. The surfactant is a mixture of alkyl dimethyl betaine and fatty acid sorbitan; the weight ratio of alkyl dimethyl betaine: fatty acid sorbitan is 1:0.3. The cross-linking agent is the cross-linking agent JL-1. The dispersion stabilizer is acryloyloxyethyltrimethylammonium chloride. The initiator is ammonium persulfate.

Embodiment 3

[0042] This embodiment provides a polymer microsphere water plugging and profile control agent. The weight parts of each component are shown in Table 1, wherein the main ingredients are: 27 parts of acrylamide, 14 parts of isooctyl acrylate, and 12 parts of N-vinylpyrrolidone 3.8 parts of surfactant, 11 parts of bentonite, and 2.5 parts of calcium carbonate. The surfactant is a mixture of alkyl dimethyl betaine and fatty acid sorbitan; the weight ratio of alkyl dimethyl betaine: fatty acid sorbitan is 1:0.4. The cross-linking agent is the cross-linking agent JL-1. The dispersion stabilizer is acryloyloxyethyltrimethylammonium chloride. The initiator is ammonium persulfate.

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Abstract

The invention discloses a polymer microsphere water plugging profile control agent and a preparation method thereof, which belong to the technical field of petroleum exploitation and are made of the following components: main agent, dispersion stabilizer, crosslinking agent, initiator, auxiliary agent, water. The invention exhibits good expansibility, and the expansion multiple increases rapidly in the first 7 days, and after 14 days, the expansion multiple increases slowly. As the temperature rises, the expansion multiple of the microspheres is higher, up to 120 times. In formation water at 90°C and salinity of 20g / L, the microspheres are stable for more than 6 months, and the plugging rate reaches more than 98.7%. The expanded particles have certain elasticity, strength and water retention function, and can stay in the formation void for a long time to achieve the purpose of profile control and water plugging. The recovery factor is 35%‑42%.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a polymer microsphere water blocking profile control agent and a preparation method thereof. Background technique [0002] As an extremely important non-renewable resource in the natural environment, oil plays an irreplaceable role in the economic development of the entire country. As the main raw material of energy and chemical industry in today's society, its proportion in the energy consumption structure is increasing day by day, but the accompanying problem of decreasing reserves has become a bottleneck restricting social development. Therefore, how to improve the recovery rate of crude oil in the formation and make full use of the existing oil resources that can be exploited by human beings has become an inevitable problem faced by the whole society. In the process of oilfield development, when the original energy of the oil layer begins to decrease, it is ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/516C09K8/512C09K8/508
CPCC09K8/516C09K8/5083C09K8/512
Inventor 王少鹏
Owner ZHENGZHOU INST OF TECH
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