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凝析气藏是一种特殊的油气藏类型，其物质平衡方程式与常规气藏物质平衡方程式应存在较大的差异。章从物质平衡原理出发，建立起了注气开采，有天然水驱，带油环的凝析气藏物质平衡方程通式。该凝气藏物质平衡方程通式既能描述气藏弹性能的释放过程，又能描述气藏反凝析引起的物质平衡现象，并可简化为几种特例下凝析气藏的物质平衡方程，为凝析开藏开发动态分析及预测提供了一种有效的手段。

Material Balance Equation of Oil-rimming Condensate Gas Reservoir

Condensate gas reservoir is a special kind of reservoir and its material balance equation is greatly different from that of conventional gas reservoir.On the principle of material balance,a general formula of the material balance equations of the gas-injecting,natural water flooding and oil-rimming condensate gas reservoirs is setting up in the paper.This general formula can describe not only the releasing process of elastic energy in gas reservoir but also the material balance phenomenon caused by the retrograde condensation in gas reservoir and it can be simplified as the material balance equations of condensate gas reservoirs under several special cases,thus providing a effective means for the performance analysis and prediction of condensate gas reservoir development.