METHOD FOR HYDROCARBON DEPOSIT DEVELOPMENT AT LATER STAGE Russian patent published in 2006 - IPC E21B43/16 

FIELD: oil production, particularly enhanced recovery methods for obtaining hydrocarbons in difficult geological conditions characterized by tectonic features, in presence of fissures, local or layer non-uniformity with high number of permeable intervals, especially for depletion driven deposits having water-flooded wells or a great number of inactive wells.

SUBSTANCE: method involves separating producing wells having low yields from total group of drilled wells, wherein the selected wells have low production rates, and separating inactive wells from above group; determining zones of abnormal geological stress in productive reservoir rock within reservoir to be developed; applying action to abnormal geological stress zone center from day surface and/or from producing wells by creating elastic vibrations having frequency and duration, which provide spontaneous branched multifractal fissure formation; fixing fissure zone as stress center response to elastic vibrations; determining spatial orientation of spontaneous fissure formation zone; orienting elastic oscillation towards peripheral spontaneously formed fissure zone, which is located at the nearest inactive well; continuing above fissure development by elastic oscillation application; performing periodical elastic oscillation orientation with leading on new oscillation front to direct fissured zone to above inactive well; filling fissured zone with liquid hydrocarbon; blasting inactive wells, wherein at least two blasts are carried out in the wells and blast waves and/or gas bubble pulses are interfered to extend fissure pattern and to provide unsteady hydrodynamic regime of pulsed productive reservoir treatment with filtration direction change in well and remote zones.

EFFECT: increased efficiency of hydrocarbon deposit development with blasting due to previous preparation of productive reservoir rock massif with taking into consideration abnormal stressed state of the massif, group fissuring thereof in predetermined direction and possibility to increase energy in depleted reservoir along with reservoir filtration ability conversion.

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