致密砂岩气藏多段压裂水平气井动态控制储量计算方法  

A Method for Calculating Dynamically Controlled Reserves of Multi-Stage Fractured Horizontal Wells in Tight Sandstone Gas Reservoirs

作　　者：蔡振华[1] 王文升[1] 李昀昀[1] 赵战江[1] 杨先山[2] 陈岩[3] 杨飞[4] 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300457 [2]长江大学信息与数学学院,湖北荆州434023 [3]油气资源与勘探技术教育部重点实验室(长江大学),湖北武汉430100 [4]中石化江汉油田工程公司井下测试公司新疆塔里木测试分公司,新疆库尔勒841000

出　　处：《长江大学学报（自然科学版）》2017年第1期31-35,共5页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项(2011ZX05015;2011ZX05013);长江大学青年基金项目(2015cqn77)

摘　　要：致密气藏的特点是渗透率极低,动态变化复杂。动态储量是气井生产决策的依据,常用的有容积法、常规物质平衡法和产量递减等,其中最常用的是物质平衡方法,但需要关井获得地层压力,影响气井正常生产,对气田来说经济性差。以动态物质平衡为基础,在拟-拟稳定状态下,结合气藏渗流方程和物质平衡方程,推导出可以用井底流压来表示地层压力,并结合致密气藏生产特点提出利用井底流压来计算动态储量的方法。该方法简便实用,与其他方法相比,不需要关井即可求得平均地层压力,从而避免影响气井正常生产,就能够快速准确算出生产各阶段的储量变化。The major feature of tight gas reservoirs is low permeability.Well performance is extremely complex.The dynamic reserves were the basis for production decision for gas wells,the commonly used methods include volumetric method,conventional material balance method and production decline method,where the material balance method is the most commonly used,it uses the shut-in pressure measurement data to calculate the dynamic reserves,it would influence the normal production in gas wells and it is low beneficial for gas field operators.In this study,based on the dynamic material balance and under the condition of quasi-steady state,combined with filtration equation and material balance equation of gas reservoirs,the method that expresses the formation pressure with bottom hole pressure is derived,in combination with the characteristics of tight gas reservoirs,the method for calculating the dynamic reserves with bottom hole flow pressure is proposed.The new method is convenient for use,compare with other methods,it can obtain the average formation pressure without shut in,and without influencing the normal production in gas wells,it can quickly and accurately calculate the reserves variations in each period of production.

关 键 词：致密砂岩气 多段压裂 控制储量 物质平衡 

分 类 号：TE353.2[石油与天然气工程—油气田开发工程]