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.
CN111234792BActive Publication Date: 2022-05-27ZHENGZHOU INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU INST OF TECH
Publication Date
2022-05-27

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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%.
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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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