利用生产数据计算气井地层压力方法优选

Method optimizing of using production data to calculate formational pressure of gas well

王富平 黄全华 杨海波 赵长征 陈 林

西南石油大学石油工程学院，四川  成都  610500 四川省地质矿产勘查开发局一零六地质队，四川  温江  611130 四川省彭州市环境监测站，四川  彭州  611930 西南油气田分公司川中油气矿，四川  遂宁  629000

School of PetroleumEngineering, Southwest PetroleumUniversity, Chengdu 610500, China No. 106 Geologic Team, Geological Exploration Bureau of Sichuan Province,Wenjiang 611130, China Pengzhou Environmental Monitoring Station of Sichuan Province, Pengzhou 611930, China Central Sichuan Oil-Gas Field, Southwest Oil and Gas Field Company, CNPC, Suining, 629000, China

气井的地层压力是气藏动态分析（例如产能、控制储量的确定等）不可少的参数，目前计算地层压力的方法较多，但过程较为复杂。针对这个问题，介绍了利用生产数据来估算气井地层压力的4种方法，即流动物质平衡法、产能方程反推法、关井井口压力折算法及类似于不关井测压的方法——流压－产量线性拟合外推法，并对4种方法自身的适用条件以及各自的优缺点进行了简要分析。最后在实例中将这些方法计算结果与实测地层压力对比，综合优选出求取地层压力的最佳方法。

The formation pressure of gas well is a vital parameter for gas reservoir’s dynamic analysis, such as the establishment for deliverability and controlled reserve etc. At the moment, there are many methods to calculate formation pressure, but the process is more complex. In view of the problem, four methods to calculate the formation pressure of gas well are introduced by using production data. They are flowing material balance method, deliverability equation inverse method, shut in wellhead pressure reduced method and pressure-deliverability linear fitting method. The paper has brief analyzed these method’s proper applicable
condition and pros and cons. At last, it makes a comparison between the results of these four methods and actual measured formation pressure in example and has synthetically optimized the best method.