Polymer resin adhesive for profile control and water plugging of oil and water wells

Abstract

The invention discloses a polymer resin adhesive for profile control and water plugging of oil and water wells, and relates to the technical field of oil and gas exploitation, the polymer resin adhesive for profile control and water plugging of oil and water wells comprises the following components: 3-4% of polymer resin, 3-4% of a water-soluble monomer, 0.05-0.1% of a cross-linking agent, 0.005-0.01% of an initiator, 0.1-0.2% of a deoxidant, 0.1-0.2% of an anti-acid stabilizer, and the balance of water; according to the polymer resin adhesive for profile control and water plugging of the oil-water well, the polymer resin and the water-soluble resin are initiated by the initiator to form resin free radicals, the free radicals and the monomers are subjected to chain reaction polymerization and cross-linking to form a macromolecular network structure, the resin adhesive with high overall strength is formed, and the polymer resin adhesive for profile control and water plugging of the oil-water well can effectively plug cracks, karst cave type flooding and water channeling of the oil-water well; and oil reservoir deep profile control can be achieved, the plugging effect is ideal, and actual use is facilitated.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a polymer resin glue for profile control and water shutoff of oil and water wells. Background technique [0002] At present, my country's onshore oil is basically developed by water injection. Under the development of oil wells, the phenomenon of water production is becoming more and more common. With the continuous improvement of water injection development, the water content also increases. According to the previous survey results, the water content of the current oil fields in my country has reached 80%, especially in the eastern region, the water content has reached 90%. Under this background, the proportion of water in oil is increasing, which leads to higher energy consumption and lower production rate. Water plugging becomes more important. [0003] As oilfield development gradually enters the middle and late stages, due to channeling of water layers, bo...

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Problems solved by technology

[0003] As the oilfield development gradually enters the middle and later stages, due to channeling of the water layer, bottom water coning or bursting of injection water and edge water, some oil wells have premature water breakthrough or water flooding; The water injected into the block breaks through rapidly along the high permeability layer, resulting in a large amount of water outflow from oil wells, which greatly affects the crude oil yield. The problem of water outflow in oilfields is becoming more and more common, and it is urgent to use water shutoff agents to control and solve them.

[0004] At present, the main water shutoff agent used is water-based hydrolyzed polyacrylamide-based water shutoff agent. This chemical profile control agent is used in the process of forming water shutoff materials with low cost and high utility. The on-site use process is simple, and the requirements for on-site operation are not high, but this kind of plugging agent is prone to degradation at high temperature, and its long-term stability is poor. The plugging experiment of porous media shows that water-based hydrolyzed polyacrylamide gel can It is not easy to form colloids during the dynamic migration and shearing of porous media; in high salinity brine, the thickening property of water is insufficient, etc.

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