METHOD FOR EXTRACTION OF OIL RESERVOIR Russian patent published in 2004 - IPC

FIELD: oil extracting industry.

SUBSTANCE: method includes determining direction of reservoir-scale fractures, placement of wells, extraction of oil through producing wells and pumping of working substance into injection wells. Along reservoir-scale fractures an injection well and a producing well most proximate to it and with least debit are selected. Into selected wells stimulating agent is pumped and concentrated repression onto productive bed is performed under excessive pressure of stimulating agent with prior forming of vacuum before the flow of stimulating agent, with limiting pressure exiting into the well from treated range and with support of pressure in treated range at same level as pressure in well-adjacent area. After that the same treatment is performed in producing well placed along direction of reservoir-scale fractures to opposite direction from selected injection well. Then, the same treatment is performed on another portion of reservoir, located along direction of reservoir-scale fractures. Then, the same treatment is performed on other portions of reservoir placed along other directions of reservoir-scale fractures.

EFFECT: higher oil productiveness of reservoir.

1 ex, 1 dwg