超高压气井储量计算方法研究  

Reserve Calculation Methods for Extra-high-pressure Gas Wells

作　　者：李旭成[1] 曹建[1] 梁静[2] 周光亮[1] LI Xucheng;CAO Jian;LIANG Jing;ZHOU Guangliang

机构地区：[1]中国石油西南油气田公司川西北气矿，四川 江油 621709 [2]中国石油西南油气田公司勘探开发研究院，四川 成都 610051

出　　处：《天然气技术与经济》2018年第4期35-37,82,共4页Natural Gas Technology and Economy

摘　　要：超高压气藏大多原始地层压力高、初期测试产量大,开发过程动态特征变化规律不同于常规气藏,储量规模确定困难,气藏评价存在难度。针对储量计算难点,开展超高压气藏物质平衡法储量计算关键参数研究,主要是偏差因子计算及综合压缩系数取值适应性分析,同时结合超高压气井生产动态资料,开展常规储量计算方法适应性评价研究工作。研究认为,温度对压缩因子经验公式计算结果影响较小,各计算方法中HY方法计算误差最小,推荐采用该方法进行超高压气藏压缩因子估算。各常规储量预测方法中,物质平衡校正法和解析法效果较好,但对资料要求较高;产量累计法、油压递减法和罗杰斯蒂函数法所需计算参数少,计算简便,但早期计算误差较大,不利于早期气藏动态特征认识。For marine gas wells with extra-high pressure in western Sichuan Basin,we implemented a study on empirical calculation formula of gas deviation factor,and analyzed the applicability of various methods to calculate reserves.Results show the smallest error obtaining from HY method through compressibility factor.So,HY method is recommended to cal-culate the compressibility factor for those extra-high-pressure gas wells.Moreover,a comparison of various calculation meth-ods reveals that⑴both material balance and analytical meth-ods are strict to dynamic monitoring data even better effect gained;(2)cumulative output,oil-pressure decline,and logis-tic function methods have advantages of less required parame-ters and convenient calculation whereas disadvantages of off-set existing in early calculation,which is not conducive to recognizing reservoir dynamic features;and(3)by material bal-ance method available for fractured and fractured-vuggy gas reservoirs with extra-high pressure,the calculated result is mainly affected by comprehensive compressibility.So,it is sug-gested to carry out the study on the compressibility.

关 键 词：超高压 偏差因子 储量预测 

分 类 号：TE155[石油与天然气工程—油气勘探]