METHOD OF DEVELOPING OIL DEPOSIT WITH CARBONATE FISSURED RESERVOIRS Russian patent published in 2003 - IPC

FIELD: oil producing industry, particularly, development of oil deposits; applicable in development of carbonate massive pools with subvertical fissures. SUBSTANCE: method includes drilling of deposit by system of wells with vertical and horizontal bores and tapping of pool formations, cyclic injection of displacement agent, injection of reagent for equalization of displacement front, withdrawal of formation products. In development of massive carbonate reservoirs with subvertical fissures, injection well is drilled with vertical bore, and lower foot water-saturated part of formation is drilled-in, and producing well with horizontal bore is located in roof part of producing formation. In this case, injected into injection well is plugging mortar at pressure exceeding pressure of opening of vertical fissures, and producing well during said injection is shut-in. EFFECT: increased coverage of formations by waterflooding and higher oil recovery from formations. 4 dwg