METHOD OF OIL FORMATION DEVELOPMENT Russian patent published in 2003 - IPC

FIELD: development of oil deposits, particularly, methods of heat stimulation of pools containing oil of high-viscosity. SUBSTANCE: method includes driving of mine workings under oil formation, drilling from said workings of injection and producing wells in oil formation, alternation of steam injection into injection wells with oil withdrawing from producing wells. During steam injection into injection wells when their injectivity drops, fluid from producing wells is periodically withdrawn to restore injectivity of injection wells. After increase of formation temperature, for instance, 20-30 C as compared with running values, steam injection is discontinued and continuous withdrawal of oil from producing wells is started. When oil production reduces, steam is periodically injected at initial stage of development. At late stage, injected into injection wells is water produced in oil recovery. EFFECT: higher efficiency of formation development by increase of rate of formation heating and withdrawal of oil from it due to regulation of conditions of steam injection and oil withdrawal with consideration of formation thermodynamic state. 3 dwg, 1 ex