Method for improving recovery factor of bottom water condensate gas reservoir
A technology for condensate gas reservoir and recovery factor, which is applied in the development of fluids, earthwork drilling, wellbore/well components, etc. Yield effect
Active Publication Date: 2020-01-21
CHINA PETROLEUM & CHEM CORP +1
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[0006] Aiming at the above-mentioned problems in the prior art, this application proposes a method for improving the recovery rate of bottom water condensate gas reservoirs, which effectively solves the problem o
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Abstract
The invention provides a method for improving the recovery factor of a bottom water condensate gas reservoir. The method comprises the following steps: step 1, determining a target horizontal well ofthe bottom water condensate gas reservoir; step 2, injecting supercritical CO2 into a gas-water interface through the target horizontal well; step 3, performing well closing treatment on the target horizontal well injected with the supercritical CO2; and step 4, opening the well and flowing back the CO2. Through the method provided by the invention, the problems of water flooding, gas well productivity reduction and final condensate gas reservoir recovery factor reduction caused by bottom water coning in the current gas field horizontal well development process are effectively solved.
Description
technical field [0001] The invention relates to the field of natural gas exploration and development, and more specifically, to a method for increasing the recovery rate of bottom water condensate gas reservoirs. Background technique [0002] Most of the gas reservoirs in my country belong to different degrees of water drive gas reservoirs, among which the gas reservoirs with active edge and bottom water account for about 40-50%. Since the recovery degree of gas reservoirs is low when water breaks through, timely water control measures need to be taken. A large number of research and development examples show that gas-liquid two-phase flow will occur in gas reservoirs after edge-bottom water intrusion, resulting in reduced productivity of gas wells and The water-free gas production period is shortened, the abandonment pressure of the gas reservoir is increased, and the ultimate recovery rate is greatly reduced. How to control water has always been a difficult problem for ga...
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Login to View More IPC IPC(8): E21B43/16
CPCE21B43/164
Inventor 史云清贾英严谨郑荣臣
Owner CHINA PETROLEUM & CHEM CORP