砂岩中大都含有不同类型和数量的粘土矿物,遇水后会引起粘土的膨胀,分散迁移,造成地层堵塞,导致注水井注水量降低,油井减产,甚至停产。据资料报道,MHAC 对粘土的防膨效果很好,美国已进行200多口油井试验普遍有效。从经济效益和社会效益考虑,笔者认为它是一种较好的粘土防膨剂,因而进行了试制,并对其防膨效果在实验室中进行了初步试验,取得了可喜的效果。 Most of the sandstone contains different types and amounts of clay minerals. After encountering water, it will cause the clay to expand, disperse and migrate, resulting in the blockage of the formation, leading to the decrease of injection water injection wells, the reduction of oil wells and even the discontinuation of production. According to the information reported, MHAC anti-swelling effect of clay is very good, the United States has conducted more than 200 well tests are generally valid. Considering the economic and social benefits, I think it is a better clay anti-swelling agent, so the trial production, and its anti-swelling effect in the laboratory conducted a preliminary test, and achieved gratifying results.