苏里格气井目前地层压力计算方法研究

Study on the calculation method of present reservoir pressure in the Sulige gas field

压力是气藏能量的直接体现,及时、准确地掌握气藏的地层压力变化,对于气藏动储量计算及开发效果预测都具有重要的意义。苏里格气田由于采用井下节流的生产方式,测压较为困难,因此地层压力测试资料很少,鉴于此本次研究开展了井口压力折算法经验公式的求取、压降法、流动物质平衡法、现代产量不稳定分析法等方法的对比研究,优选出苏里格气田不同特征井所适合的地层压力计算方法。

Pressure is the direct embodiment of gas reservoir energy,timely,accurately grasp the formation pressure of gas reservoir changes,for the development of gas reservoir dynamic reserves calculation and effect prediction has important significance.As a result of downwell throttling mode of production,pressure is relatively difficult,so few formation pressure test data in the Sulige gas field. In view of this study conducted a wellhead pressure conversion method of empirical formula of flow,pressure drop method,material balance method,modern production instability analysis methods such as comparative study,optimizing the different characteristics of well suitable for the method to calculate formation pressure in the Sulige gas field.