广义物质平衡计算在凝析气藏开采动态预测中的应用

从经济的角度考虑 ,对小型凝析气藏衰竭式开采动态的预测往往不必或不值得进行数值模拟研究。常规物质平衡 (黑油 )计算方法只局限于黑油和干气藏 ,应用于凝析气藏则存在很大的误差。Walsh提出的广义物质平衡计算方法 ,可用于包括黑油、干气藏、挥发油气藏和凝析气藏在内的所有油气藏。文中将一个小型凝析气藏衰竭式开采动态的数值模拟结果与广义物质平衡计算结果进行了对比 ,结果表明 ,Walsh方法简便、应用更广泛 ,可用于规模较小、不适合进行数值模拟研究的凝析气藏的现场开发优化。

AN APPLICATION OF GENERALIZED MATERIAL BALANCE CALCULATION TO PREDICTION OF PRODUCTION PERFORMANCE FOR CONDENSATE GAS RESERVOIR

For economic considerations, it is not necessary or worthy to conduct numerical simulation for prediction of depleted production performance for small condensate gas reservoirs. But the conventional material balance equation (Black Oil), only applying to black oil and dry gas reservoir, will produce a considerable error when used for condensate gas reservoirs. However, the generalized material balance calculation presented by Walsh may apply to all types of reservoir, including black oil, dry gas, volatile and condensate gas reservoirs. For a small condensate gas reservoir, the results of numerical simulation of depleted production performance are compared with the results of these generalized material balance calculation, which suggests that the method presented by Walsh can be more easily and widely used, and especially suitable to optimizing development of smaller condensate gas reservoirs unworthy of numerical simulation.