HYDROCARBON ACCUMULATION DEVELOPMENT METHOD Russian patent published in 2006 - IPC E21B43/16 

FIELD: oil production industry, particularly to develop hydrocarbon accumulation in difficult conditions characterized by tectonic features, fissuring, zonal and/or stratified inhomogeneity with high number of permeable intervals.

SUBSTANCE: method involves choosing productive wells characterized by fluid recovery index below admissible one and/or by water influx index exceeding admissible one from all stock of productive wells drilled in the bed; putting the selected productive wells from operation in turns; controlling well reaction to putting thereof from operation by determining degree or rate and watering and/or gassing of produced fluid; determining at least one abnormal zone with geological stress of productive bed rock within developed oil bed boundaries; determining priority production wells among the selected ones within above abnormal zone, wherein the priority wells react to putting thereof from operation and are directly connected with central abnormal zone or may be connected with above zone; bringing above priority well into operation along with creation of pressure difference providing opening of natural vertical productive bed cracks in well bore zone of above well; filling the well bore zone with liquid hydrocarbon under elevated pressure; sealing the well and applying action to the created crack zone by performing at least two underground explosions along with provision of interference between blast waves and/or gas holes thereof to extend crack system and provide non-stationary hydrodynamic pulsed treatment of productive bed with alternating filtration direction in well bore and remote areas.

EFFECT: increased efficiency of hydrocarbon accumulation development due to taking into consideration of productive bed rock stresses and large-scale propagation cracks of multiracial type along with reduced power input in proximal and remote productive bed zones.

17 cl, 1 ex