METHOD OF RECOVERING OIL FROM FISSURED-POROUS COLLECTING BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this relates to development of deposits having oil collecting beds of fissured-porous type such as carbonate. This increases coefficient of oil recovery from porous parts of collecting bed. According to method, periodic operation modes are preset for producing wells at high content of displacing liquid in product. Initially, permanent modes of operation are preset for producing wells. Oil content in product of each well is determined. Then wells are switched to periodic modes of operation and oil is extracted from each separate well in several stages. At each stage, periodic mode of operation of well is preset by alternating starts and stops of well for equal time periods at permanent modes of operation of injection wells. This arrangement of hydrodynamic performance ensures maximal density of interflow between blocks and fissures of collecting bed. EFFECT: higher efficiency. 5 dwg