Profile control and water plugging agent and method for oil field

Abstract

The invention provides a profile control and water plugging agent for an oil field. The profile control and water plugging agent contains polymerizable polymer monomers, lignosulfonate and initiators, wherein the initiators are preserved independent from the polymerizable polymer monomers and the lignosulfonate. The invention further provides a profile control and water plugging method for the oil field. The profile control and water plugging method comprises the following steps of: injecting the polymerizable polymer monomers, the lignosulfonate and the initiators into a ground layer required to be subjected to profile control and water plugging, and carrying out a polymerization reaction under the ground layer temperature. With the adoption of the profile control and water plugging method and the profile control and water plugging agent, a relatively good profile control and water plugging effect can be achieved.

Description

technical field

[0001] The invention relates to an oilfield profile control water shutoff agent and an oilfield profile control water shutoff method. Background technique

[0002] Due to the heterogeneity of primary and secondary formations, differences in fluid mobility, and other reasons (such as operation failures, wrong production measures, etc.), dominant water flow channels are formed in the formations, resulting in water cones, water channeling, and water fingering, causing some Oil wells break through water or flood out prematurely, and water flooding is inefficient or ineffective in circulation. Therefore, the profile control and water shutoff technology is an effective means for oilfields to improve the development effect of water flooding and realize the stable production of oil reservoirs. The purpose of profile control and water shutoff is to improve the development effect of water flooding, increase the swept volume of injected water in the oil layer, and then...

Images