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科学开发低渗透油气田是中国石油工业发展的重要战略方向之一。要开发好低渗透油气田,首先应正确认识其储层特征和渗流规律,正确地进行渗流力学计算,制定合理的开发方案。调查半径有若干个用途,帮助解释压力恢复或压力降落曲线的形状,并可以利用调查半径来估计测试到所要求的地层范围需要的时间。从低渗非达西渗流流动方程出发,利用稳态依次替换法得到了求解低渗非达西渗流调查半径计算方法。
Scientific development of low permeability oil and gas fields is one of the important strategic directions for the development of China’s oil industry. To develop low permeability oil and gas fields, we should first of all correctly understand the reservoir characteristics and seepage laws, correctly calculate the seepage mechanics and formulate a reasonable development plan. The survey radius has several uses to help explain the shape of the pressure recovery or pressure drop curve and to use the survey radius to estimate the time it takes to test the desired stratigraphic range. Based on the flow equation of infiltration with non-Darcy seepage, the method of calculating the radius of the seepage for non-Darcy seepage with low permeability is obtained by steady-state sequential substitution method.