A kind of polymer microsphere regulating and displacing agent and preparation method thereof

Abstract

The invention discloses a polymer microsphere adjusting and driving agent, which comprises the following raw materials in parts by weight: 21-25 parts of acrylamide, 5-8 parts of anionic surfactant, 0.5-1.2 parts of crosslinking agent, and 5-8 parts of emulsifier 1.5-2 parts of ammonium persulfate, 0.1-0.5 parts of potassium persulfate, 150-250 parts of oil and 100-280 parts of deionized water; stir the oil and emulsifier evenly to form a continuous oil phase; mix acrylamide, anion surface Active agent, crosslinking agent, and part of ammonium persulfate are dissolved in deionized water to form a water phase; potassium persulfate solution and ammonium persulfate solution are prepared; the water phase is added to the oil phase, ammonium persulfate solution is added at low temperature, and persulfate solution is added at high temperature Potassium solution, constant temperature reaction and natural cooling to room temperature. The invention provides a polymer microsphere control and displacement agent, through the combined reaction of the above-mentioned several materials, it is possible to synthesize polymer gel microspheres with good gel ductility matching its pore throat size, which greatly improves oil recovery .

Description

technical field [0001] The invention relates to the technical field of oil-displacing agents for oil fields, in particular to a polymer microsphere regulating and displacing agent and a preparation method thereof. Background technique [0002] As an extremely important energy source and chemical raw material, the worldwide demand for oil continues to grow, especially in my country. On the one hand, the growth rate of oil demand for national economic development is greater than ever before. On the other hand, my country's main oil fields All of them have entered the period of high water-cut or ultra-high water-cut mining, the difficulty of mining has increased, the rate of production decline has increased, and the reserve reserves are seriously insufficient, and the contradiction between supply and demand of oil has become increasingly prominent. There are two effective ways to alleviate the increasingly prominent contradiction between oil supply and demand: one is to find new...

AI Technical Summary

Problems solved by technology

For my country's oilfields, there are many development layers, and the inter-layer and intra-layer heterogeneity are serious. After entering the high water-cut and ultra-high water-cut period, the injection fluid has a small sweep coefficient and a low recovery factor.

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