摘要
气藏储量的确定是安排采气速度、制定合理气藏开发方案的基础。静态物质平衡法储量计算前提是需关井恢复并获取地层压力,对于凝析气井的关井会造成井底的积液,积液严重者开井后可能不会实现自喷。借助成熟的管流软件建立井筒管流模型,在优选流动相关式的基础上通过井口油压来求取井底流动压力。基于拟稳态条件下油气藏生产特性,应用动态物质平衡法来确定海上某凝析气藏动态储量。该方法不需关井即可获得地层压力,减小了气井产量损失,对于不便经常开展测试作业的海上气井具有十分重要的应用价值。
Reserves determination is the foundation of working out both a production rate and a reasonable development plan for gas reservoirs.Reserves calculation using static material balance method needs to shut in and acquires formation pressure.For a condensate-gas well,shut-in can cause downhole liquid loading.In some severe cases,blowing may not appear after well opening.In this study,a tube-flow model is established by some mature software.On the basis of optimizing relative expression for flowing,it can be used to calculate downhole flowing pressure through wellhead pressure.According to the producing properties under the condition of pseudo steady-state,dynamic material balance method is applied to determining dynamic reserves for an offshore condensate-gas reservoir.This method can acquire formation pressure without shut in.It reduces the yield loss and is of significance to offshore gas well which tests inconveniently.
出处
《天然气勘探与开发》
2012年第1期54-56,82,共3页
Natural Gas Exploration and Development
基金
上海市科委2009年度"创新行动计划"临港新城(海洋科技)科技支撑项目子课题"东海油气田薄油层开发关键技术"(09DZ1201100)部分成果
关键词
气藏
储量计算
动态物质平衡
拟稳态
gas reservoir,reserves calculation,dynamic material balance,pseudo steady-state
