边水气藏气井合理生产压差及产量的确定

在水驱气藏开发过程中，气水界面的稳定运动及均匀推进对于气井稳定正常生产、提高气藏采收率有较大影响。考虑具有一定倾角的均质各向同性边水气藏，在假设原始气水界面为一水平面的情况下，利用气、水地层渗流的基本规律，从理论上推导了保持气水界面稳定运动时气体渗流速度应满足的条件，同时获得了气井合理生产压差及产量的表达式，并对１口边水气藏气井的生产进行了分析，结果表明所提出的计算方法具有符合现场生产实际的特点，为边水气藏气井合理工作制度的确定提供了依据。

REASONABLE PRODUCTION PRESSURE DIFFERENCE AND PRODUCTION DETERMINATION OF GAS WELLS IN EDGE WATER DRIVE GAS RESERVOIRS

In the process of water drive gas reservoir development, the stable movement and uniform advance of gas/water interface have a relatively significant influence on the stable and normal production of gas wells and the recovery improvement of gas reservoirs. The paper analyzed the homogeneous isotropic edge water drive gas reservoir with certain inclined angle. On the assumption that the initial gas/water interface is horizontal, by using the basic law of Darcy seepage, we derived out condition of gas seepage velocity of stable movement for gas/water interface theoretically, obtained the expression of reasonable production pressure difference and productivity and analyzed a gas well in edge water drive gas reservoirs. Results showed that the calculation method proposed is consistent with the characteristics of field production, which provides a basis for the determination of reasonable working system for gas wells in edge water drive gas reservoirs.