PROCESS ISOLATING PRODUCTIVE AND NONPRODUCTIVE FORMATIONS

摘要

FIELD: oil and gas production, segregation of formations in well. SUBSTANCE: nonproductive formations are impregnated with gel-forming compound. Casing string is sunk. String clearance is filled with cement mortar. In correspondence with invention nonproductive formations are perforated prior to sinking of casing string. Additional excessive pressure is formed in interval of nonproductive formations in process of impregnation of nonproductive formations in well. EFFECT: enhanced efficiency of process. 1 cl