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METHOD OF MULTI-STAGE TREATMENT OF INJECTION WELL BOTTOMHOLE ZONE IN TERRIGENOUS AND CARBONATE FORMATIONS
METHOD OF MULTI-STAGE TREATMENT OF INJECTION WELL BOTTOMHOLE ZONE IN TERRIGENOUS AND CARBONATE FORMATIONS
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机译:陆源和碳酸盐岩地层注入井底带的多阶段处理方法
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FIELD: oil and gas industry.;SUBSTANCE: method of multi-stage treatment of injection well bottomhole zone in terrigenous and carbonate formations includes hydrochloric acid treatment with acid composition of 0.5-1m3/m volume followed by pressing with aqueous solution of colloidal silicon dioxide nanoparticles or aqueous solution of surface-active substance of 2-3 m3/m volume; clay-acid treatment with clay-acid composition based on hydrochloric and hydrofluoric acids with 0.8 0.5 m3/m volume followed by pressing with aqueous solution of colloidal silicon dioxide nanoparticles or an aqueous solution of surface-active substance of 2-3 m3/m volume, treatment with hydrocarbon solvent of 0.5 m3/m volume and with clay-acid composition based on hydrochloric and hydrofluoric acids with 0.5 m3/m volume then by spraying aqueous solution of colloidal silicon dioxide nanoparticles or aqueous solution of surface-active substance of 2-3 m3/m volume. The following composition is used as acid composition, vol %: 30% hydrochloric acid 50-63; diethylene glycol 6-16; acetic acid 1-3; water-repellent agent based on amides, 1-3; corrosion inhibitor, 1.5-2; the rest is process water. The following composition is used as the clay-acid composition, vol %: 30% hydrochloric acid 48-60; hydrofluoric acid 1-4; diethylene glycol 6-16; acetic acid 1-3; water-repellent agent based on amides, 1-3; corrosion inhibitor, 1.5-2; the rest is process water. As aqueous solution of colloidal silicon dioxide nanoparticles, 1-2%- aqueous solution of colloidal silicon dioxide nanoparticles is used, containing wt %: colloidal silicon dioxide in acrylic acid, 32-40; propylene glycol monomethyl ether, 59.5-67.5; the rest is water. Aqueous solution of surface-active substance is 2-4% aqueous solution of surface-active substance containing, wt %: diethylene glycol, 1-3; hydrophobic agent based on amides, 0.5-2; the rest is process water. Solvent based on toluene fraction of straight-run gasoline or based on an aromatic hydrocarbon concentrateC10 is used a hydrocarbon solvent.;EFFECT: increased efficiency injection wells, reduced time for implementation of the method, its simplification and reduced cost.;2 cl, 7 dwg
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机译:领域:陆上和碳酸盐岩地层注入井底孔区的多阶段处理方法包括盐酸处理,酸成分为0.5-1m 3 Sup> / m体积用胶态二氧化硅纳米颗粒水溶液或表面活性物质的水溶液(体积为2-3 m 3 Sup> / m)压制;用基于盐酸和氢氟酸的粘土酸组合物以0.8 0.5 m 3 Sup> / m的体积进行粘土酸处理,然后用胶体二氧化硅纳米颗粒水溶液或表面活性物质水溶液加压2-3 m 3 Sup> / m的体积,用0.5 m 3 Sup> / m体积的烃类溶剂处理,以及0.5 m的基于盐酸和氢氟酸的粘土酸组合物处理 3 Sup> / m体积,然后喷涂胶态二氧化硅纳米颗粒水溶液或表面活性物质的水溶液2-3 m 3 Sup> / m体积。使用以下组成作为酸组成,体积%:30%盐酸50-63;和二乙二醇6-16;乙酸1-3;基于酰胺的防水剂,1-3;缓蚀剂1.5-2;其余的是工艺用水。使用以下组成作为粘土-酸组成,体积%:30%盐酸48-60;和50%盐酸。氢氟酸1-4;二乙二醇6-16;乙酸1-3;基于酰胺的防水剂,1-3;缓蚀剂1.5-2;其余的是工艺用水。作为胶态二氧化硅纳米颗粒的水溶液,使用1-2%的胶态二氧化硅纳米颗粒的水溶液,其包含wt%:丙烯酸中的胶态二氧化硅32-40;和丙二醇单甲醚,59.5-67.5;剩下的就是水。表面活性物质的水溶液为含有2重量%的二甘醇1〜3的表面活性物质的2〜4%的水溶液。基于酰胺的疏水剂,0.5-2;其余的是工艺用水。基于直馏汽油的甲苯馏分或基于芳香烃浓缩物 C10 Sub>的溶剂被用作烃类溶剂。效果:提高了注入井的效率,缩短了实施该方法的时间,简化了方法并降低成本。; 2 cl,7 dwg
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