Method for controlling water and preventing sand by using phase permeability regulator

Abstract

The invention discloses a method for controlling water and preventing sand by using a phase permeability regulator. The regulator comprises the following components in part by mass: 5 to 15 parts of acrylic acid, 2 to 8 parts of propylene, 1 to 8 parts of sulfonated propylene and the balance of deionized water. The preparation process comprises the following steps of: a, adding the acrylic acid monomer, the propylene, the sulfonated propylene and the deionized water into a reaction kettle in turn, and stirring the mixture uniformly; b, heating the mixture to the constant temperature of 90 DEG C; c, introducing nitrogen and stirring for 30 minutes, and removing oxygen from the solution; and d, adding 0.2 to 0.8 mass percent of solid initiator to initiate polymerization reaction of the solution for 7 to 9 hours under normal pressure to obtain a target product, wherein the molecular weight of the target product is 7 million to 10 million. The method for controlling water and preventing sand comprises that quartz sand carried by sand carrying fluid is injected into a target layer. The sand carrying fluid is phase permeability regulating sand carrying fluid compounded by using the phase permeability regulator and a swelling prevention agent, and 0.2 to 5 weight percent of phase permeability regulator and 0.5 to 3 weight percent of swelling prevention agent are added into every ten tons of water and stirred uniformly at normal temperature under normal pressure to form the sand carrying fluid.

Description

technical field [0001] The invention relates to a method for controlling water and sand in water-bearing oil wells in oilfield development, in particular to a method for controlling water and sand with a phase permeability regulator. Background technique [0002] In the process of implementing conventional gravel packing sand control technology in oil fields, quartz sand or fracturing ceramsite is often used as the filling medium. After being filled into the oil layer, the formation compaction zone is established, and the three-stage sand control with the screen sleeve annulus and sand filter pipe However, it also has the following shortcomings or deficiencies: ① no water control function; ② the water cut rises sharply, which seriously affects the production capacity of the oil well; ③ Raising a large amount of formation water leads to a great waste of energy and environmental pollution; ④Short stable production period of oil wells leads to higher costs and affects developme...

AI Technical Summary

Problems solved by technology

[0002] In the process of implementing conventional gravel packing sand control technology in oil fields, quartz sand or fracturing ceramsite is often used as the filling medium. After being filled into the oil layer, the formation compaction zone is established, and the three-stage sand control with the screen sleeve annulus and sand filter pipe However, it also has the following shortcomings or deficiencies: ① no water control function; ② the water cut rises sharply, which seriously affects the production capacity of the oil well; ③ Raising a large amount of formation water leads to a great waste of energy and environmental pollution; ④Short stable production period of oil wells leads to higher costs and affects development efficiency or economic benefits

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