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METHOD OF TREATING BOTTOM-HOLE ZONE OF HIGH-TEMPERATURE LOW PERMEABILITY ALEURITE-ARGILLACEOUS RESERVOIRS OF LATITUDE OB REGION JURASSIC DEPOSITS
METHOD OF TREATING BOTTOM-HOLE ZONE OF HIGH-TEMPERATURE LOW PERMEABILITY ALEURITE-ARGILLACEOUS RESERVOIRS OF LATITUDE OB REGION JURASSIC DEPOSITS
FIELD: oil and gas producing industry, particularly, increase of productivity of oil-producing wells tapping high-temperature low-permeability aleurite-argillaceous reservoirs of latitude Ob region Jurassic deposits. SUBSTANCE: method includes successive injection into formation of spacer fluid, acid composition and again spacer fluid. Acid composition is forced into formation by aqueous solution of acetic acid. Spacer fluids are used in the form of oxygen-containing solvents. Treatment is effected under dynamic conditions without leaving of injected reagents on bottom-hole zone for reaction. Acid composition is used in the form of mixture of hydrochloric and acetic acids with oxygen-containing solvent in the form of mixture of isopropyl alcohol with glycols or cellosolves. The technical result of claimed method is higher efficiency of acid treatment of high-temperature low-permeability aleurite-argillaceous reservoirs due to prevention of processes of secondary sedimentation and gel formation from reaction products with increased penentration capacity of acid composition into formation and fuller removal of used solution and reaction products from zone of treatment. EFFECT: higher efficiency. 3 cl, 3 ex
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机译:领域:石油和天然气生产行业,特别是通过开采纬度Ob地区侏罗纪沉积物的高温低渗透硅铁矿-泥质油藏开发的油井的生产率。实质:该方法包括连续注入隔离液,酸成分和再次注入隔离液中。通过乙酸水溶液迫使酸成分形成。隔离液以含氧溶剂的形式使用。在动态条件下进行处理,而不会将注入的试剂留在底孔区域进行反应。酸组合物以盐酸和乙酸与含氧溶剂的混合物形式使用,以异丙醇与二醇或溶纤剂的混合物形式使用。所要求保护的方法的技术结果是,由于防止了反应产物的二次沉淀和凝胶形成过程,从而提高了酸低渗透率的硅藻土-胶质储层的酸处理效率,酸组合物的渗透能力增强了,并且充分去除了处理区域中使用的溶液和反应产物。效果:更高的效率。 3 cl,3 ex
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