METHOD FOR DEVELOPMENT OF OIL DEPOSITS Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, oil deposits are exploited on principle of dissolved gas. At first stage of development, deposit is exploited on principle of dissolved gas until gas saturation of oil bed reaches 1-50% of total oil amount in bed. At second stage of development, injected into oil bed by cyclic procedure are gas and liquid. In each cycle, liquid is delivered into oil bed in amount of 20-80% of oil volume displaced from high-permeable zones of oil bed. This allows for increasing oil recovery due to displacing oil by gas together with reducing specific use of gas and solvent because of larger embracing of oil bed by displacing agent. EFFECT: higher efficiency. 10 cl