DRIFTING PETROLEUM DEPOSIT DEVELOPMENT AT LATE STAGE WITH MAINTENANCE OF LAYER PRESSURE Russian patent published in 2004 - IPC

FIELD: petroleum extracting industry. SUBSTANCE: development method includes extraction from all supplying wells bored in deposit with lowering of their acceleration by no less than 70% of starting value and/or from all extracting wells with water denseness around extracted petroleum of no less than 80%. Periodical shutdown of wells operation is done in turn. Reaction of operating extracting wells is measured and controlled by quantity and/or speed and surrounding water denseness and/or gassing of extracted petroleum for determining wells for shutdown. Then reaction areas connected to shutdown of selected wells are determined. Then operating extracting wells are stimulated in determined areas by means of explosions done in turn in selected wells. Explosions are performed in wells near contour of selected areas. For this in each of said wells water layer is opened with total area of perforation openings against this layer and productive layer equal to 30- 75% of operating column cross-section area against the water layer. Explosions are pin-pointed with localization of their energy in the area of water layer. EFFECT: increased effectiveness of petroleum deposit development. 3 cl