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METHOD OF TREATMENT OF BOTTOM-HOLE ZONE OF HIGH- TEMPERATURE LOW-PERMEABILITY SAND-ARGILLACEOUS RESERVOIRS OF JURASSIC DEPOSITS OF LATITUDINAL OF REGION
METHOD OF TREATMENT OF BOTTOM-HOLE ZONE OF HIGH- TEMPERATURE LOW-PERMEABILITY SAND-ARGILLACEOUS RESERVOIRS OF JURASSIC DEPOSITS OF LATITUDINAL OF REGION
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机译:区域低纬度侏罗系沉积高温低渗砂砂岩型储层底孔带的处理方法
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摘要
FIELD: oil and gas producing industry. SUBSTANCE: method includes successive injection of reagent and buffer fluid into formation. Buffer fluid is used in form of mutual solvent and reagent in form of acid composition with mutual solvent. Prior to injection of reagent, buffer fluid is injected. treatment is carried out in dynamic conditions without letting stand for reaction with no stopping at stages of injection and completion and also between them. Acid composition is used in form of butylcelvosolve, or its mixture with isopropyl alcohol. EFFECT: higher efficiency of acid treatment due to increase of penetrating capacity of acid composition into low-permeability formation and fuller removal of spent solution and reaction products from treatment zone. 3 cl
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