RU95113512A - METHOD FOR DEVELOPMENT OF OIL AND GAS AND OIL AND GAS CONDENSATE DEPOSITS - Google Patents

Claims (5)

1. A method of developing oil and gas and oil condensate deposits, including controlled oil production with limited movement of gas-oil contact, characterized in that they carry out simultaneous controlled production of fluids from various parts of the reservoir and create at the same time in wells drilled into the oil-saturated part of the reservoir such maximum allowable depression, in which the dissolved gas released from the oil segregates into the gas-saturated part of the reservoir without entering the bottom of the wells, and the created depression is constantly supported They occur during the production of fluids and are controlled in a certain way.  2. A method for developing oil and gas and oil condensate deposits according to claim 1, characterized in that the created depression is controlled by measuring the gas-oil factor in wells drilled in the oil-saturated part of the reservoir and establishing its value corresponding to the normal current value of the gas-oil factor. 3. The method of developing oil and gas and condensate deposits according to claim 1, characterized in that the magnitude of the created depression is controlled by maintaining the average bottomhole pressure in the wells drilled in the oil-saturated part of the reservoir equal to the threshold value of the bottomhole pressure determined by the formula
P ^* = P ₀ + ln (η ^* / η ⁰ ) ^{1 / α} ,
where η ⁰ is the initial value of the oil productivity coefficient;
P ⁰ - the initial value of reservoir pressure, MPa;
η ^* is the threshold value of the oil productivity coefficient;
α is the degree of decrease in oil productivity coefficient, numerically equal to the slope of the straight line, characterizing the relationship between the average depressions (P ₀ - P _s ) for the reservoir and the oil productivity coefficient in semilogarithmic coordinates, where P _{s is the} average current bottomhole pressure over the drilled wells in the oil-saturated part of the reservoir.  4. The method of developing oil and gas and condensate deposits under item 1, characterized in that they produce oil from the oil-saturated part of the reservoir and gas from the gas-saturated part of the reservoir.  5. The method of developing oil and gas and condensate deposits under item 1, characterized in that they produce oil from the oil-saturated part of the reservoir, gas from the gas-saturated part of the reservoir and water from the water-saturated part of the reservoir.