A sewage mixing temporary plugging agent for oilfield water injection wells and its preparation method

Abstract

The invention discloses a sewage mixing temporary plugging agent for oil field water injection wells and a preparation method thereof, which consists of the following components and their mass percentages: monomer A 0.02%-0.05%, monomer B 1%-2% , monomer C 2%~4%, monomer D 7%~10%, pH regulator 0.5%~0.7%, initiator 0.15~0.25%, crosslinking agent 0.1%~0.3%, stabilizer 0.05%~0.08 %, 0.02% to 0.05% of additives, 0.003% to 0.004% of fungicides and the remainder of sewage. The present invention utilizes the produced sewage from the oil field to prepare a temporary plugging agent suitable for high-pressure water well workover, which avoids serious pollution to the environment and saves a large amount of water resources. The glue has high strength and can form a good plugging layer after entering the lost circulation zone, which is of great significance for workover plugging and environmental protection.

Description

A kind of sewage mixed temporary plugging agent for oilfield water injection well and preparation method thereof technical field The invention belongs to the technical field of oilfield chemistry, be specifically related to a kind of sewage mixing temporary plugging agent for oilfield water injection well and its preparation method. Background technique At present oil field can produce a large amount of sewage every year, if these sewage can not be dealt with in time, can seriously pollute the environment. environment and have a great impact on the ecosystem. Especially in recent years, my country has paid more and more attention to environmental issues, and has introduced A series of measures to increase the protection of the environment. The promulgation of my country's new environmental protection law has put forward higher requirements for environmental protection. requirements, requiring each oilfield sewage to achieve "zero discharge". If the sewage is simpl...

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Problems solved by technology

But there are also obvious shortcomings such as polluting the environment, long construction time, and high cost.

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