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运用物质平衡方法准确计算火山岩凝析气藏的动态储量,有助于编制气藏开发方案。采用理论研究结合实验数据检验的方法,从物质守恒原理入手,考虑底水侵入、基质和裂缝双孔隙储集结构等因素的影响,推导了具有火山岩凝析气藏储层特征的物质平衡方程。采用全直径岩心进行了凝析气藏衰竭模拟实验,运用实验数据对推导的火山岩凝析气藏物质平衡方程进行了检验计算,结果表明运用该方程计算的岩心储气量与实验开始前岩心饱和的凝析气量偏差极小,能够准确计算火山岩凝析气藏的动态储量。应用该方程计算新疆滴西气田滴西44区块的凝析气储量为215.424×108m3。
The material balance method is used to accurately calculate the dynamic reserves of volcanic condensate gas reservoirs, which is helpful for the preparation of gas reservoir development plans. Based on the principle of conservation of matter and the influence of bottom water intrusion, matrix and fractured double-porosity reservoir structure, the material balance equation with reservoir characteristics of volcanic gas condensate gas reservoir is deduced by theoretical research combined with experimental data. A full-diameter core was used to simulate the depletion of condensate gas reservoirs. The experimental data was used to verify the material balance equation of volcanic condensate gas reservoirs. The results show that the core gas storage capacity calculated by this equation is similar to the core saturation before the start of the experiment Condensate gas deviation is very small, can accurately calculate the dynamic reserves of volcanic condensate gas reservoir. Applying this equation, the condensate gas reserves in Block 44, Xiuxi, Xixi, Xinjiang, are 215.424 × 108m3.