双孔介质油藏抽汲井测试资料数值试井分析  

Numerical Well Testing Analysis for Swabbing Well in Double Porosity Reservoir

作　　者：汪金如[1] 王新海[1] 姜永[2] 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学),湖北荆州434023 [2]长江大学地球科学学院,湖北荆州434023

出　　处：《油气井测试》2011年第2期6-7,12,共3页Well Testing

基　　金：中国石油天然气股份有限公司科技风险创新研究项目(07-06D-01-04-02-05)

摘　　要：抽汲井井底压力变化复杂,若采用以往根据自喷井建立的数学模型进行解释,难以准确描述整个地层压力变化过程。建立的圆形封闭地层中心一口抽汲井的定产量试井模型,在考虑井筒储集效应和表皮系数的情况下,用块中心网格隐式差分格式对数学模型进行离散后求出数值解。用该模型对SX12井进行解释,其结果表明,该模型可以较好地反映井底压力复杂的变化过程,能较准确地解释双孔油藏抽汲井生产的非自喷井流动期或恢复期的测试资料。The bottom hole pressure in swabbing wells varies seriously,so it is very difficult to describe accurately the process of reservoir pressure variation by interpretation with mathematical model based on natural flow wells.A new well test model for a swabbing well located in the center of a circular closed reservoir and producing with constant flow rate was established,and a numerical solution for it by implicit difference in centric grid with taking both well bore storage effect and skin effect into account.Interpretation of Well SX12 with this model showed that the model can describe better the complicated variation process of bottom hole pressure,and analyze more accurately test data of both flowing region and build up region of swabbing wells in double porosity reservoir.

关 键 词：双孔介质油藏 抽汲井 井底压力 数学模型 数值模拟 

分 类 号：TE353[石油与天然气工程—油气田开发工程]