Preparation method for suspension polymer

Abstract

The invention relates to a preparation method for a suspension polymer. The preparation method comprises: adding an additive to polymer dry powder to form a uniform and stable suspension polymer, wherein the suspension polymer is applicable for oilfield water shutoff profile modification construction. The preparation steps comprise: adding a wetting agent to polymer dry powder with a particle size of 80-150 meshes; uniformly stirring at a stirring speed of 50-70 rotations per minute, and sequentially adding a dispersing agent, white oil, and a stabilizer while continuously stirring; and continuously stirring for 0.5-1.5 hours at the same stirring speed to obtain the suspension polymer. The preparation method of the present invention has the following characteristics that: the polymer dry powder is liquefied; the online profile modification is achieved; the operation is simple; the preparation is convenient; the labor intensity is low; the well site pollution is low; energy saving and consumption reducing are achieved; the construction cost is low; the metering is precise; the error of the preparation concentration is low; adverse factors on on-site operator health are reduced; the fish-eye is not easily generated; the polymer waste is reduced; aeration oxygen degradation of the polymer is eliminated; the solution quality and the profile modification implementation effects are ensured; and the like. In addition, the preparation method of the present invention is widely applicable for oilfield water shutoff profile modification processes.

Description

technical field [0001] The invention relates to a preparation method of polymer dry powder or cross-linked polymer gel and pre-cross-linked polymer gel used in oil field development, in particular to a preparation method of a suspension polymer. Background technique [0002] At present, polymer dry powder is the most used profile control agent in oilfield water plugging and profile control. As a profile control agent, polymer dry powder has played an important role, but it also has the following shortcomings or deficiencies: ① The dissolution of polymer dry powder requires a diffuser, a dissolving tank, and an agitator. Injection through split pumps, heavy equipment, complex process, many equipments, and large floor area; ②Extensive measurement and high labor intensity of operators; ③Great environmental pollution at the construction site, and great effect of equipment on polymer shear degradation; ④High operating costs , high energy consumption; The prepared polymer solut...

AI Technical Summary

Problems solved by technology

As a profile control agent, polymer dry powder has played an important role, but it also has the following shortcomings or deficiencies: ① The dissolution of polymer dry powder requires a diffuser, a dissolving tank, and an agitator. Injection through split pumps, heavy equipment, complex process, many equipments, and large floor area; ②Extensive measurement and high labor intensity of operators; ③Great environmental pollution at the construction site, and great effect of equipment on polymer shear degradation; ④High operating costs , high energy consumption; There are often agglomerated "fish eyes" in the prepared polymer solution, resulting in waste of polymer, which not only affects the injection of polymer solution, but also causes formation blockage

Polymer powder is easy to fly, which is harmful to the health of on-site operators