基于单探针MDT资料的气井产能计算新方法  

A new productivity calculation method for gas wells based on single probe MDT data

作　　者：李纪智 关利军 吴明录[2] 张伟 LI Jizhi;GUAN Lijun;WU Minglu;ZHANG Wei(Exploration Department of Shenzhen Branch,CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518000,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Shenzhen Operation Company,COSL Oil Technology Department,Shenzhen,Guangdong 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司勘探部,广东深圳518000 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中海油服油技事业部深圳作业公司,广东深圳518000

出　　处：《油气井测试》2021年第3期64-69,共6页Well Testing

基　　金：中海石油(中国)有限公司“十三五”科技重大项目“南海东部油田上产2000万吨关键技术研究”(CNOOC-KJ135ZDXM37SZ)。

摘　　要：为快速准确估算气井产能,以渗流力学理论为基础,根据单探针MDT测试过程中的渗流特点,建立单探针MDT球形流渗流数学模型,通过拉氏变换等方法求解模型,对单探针MDT试井曲线的特征及参数敏感性进行分析,提出应用单探针MDT试井解释结果计算探井产能的新方法。应用该方法对南海东部某口探井进行了产能计算,结果为14.8×10^(4) m^(3)/d,与DST实际测试结果17.6×10^(4) m^(3)/d,相差15.9%,能满足对产能评价的需要。该方法可以部分代替DST测试,大幅度降低勘探成本,提高勘探效益。In order to quickly and accurately estimate the gas well productivity,based on the theory of percolation mechanics,according to the percolation characteristics of single probe MDT testing,the mathematical model of single probe MDT spherical flow percolation is established.The model is solved by Laplace transform and other methods,and the characteristics and parameter sensitivity of single probe MDT testing curve are analyzed.A new method is proposed to calculate the productivity of exploration wells by using the interpretation results of single probe MDT well test.The productivity of an exploration well in the east of South China Sea is calculated by this method,and the result is 14.8×10^(4)m^(3)/d.Compared with DST actual test result 17.6×10^(4)m^(3)/d.The difference is 15.9%,which can meet the needs of capacity evaluation.This method can partly replace DST test,greatly reduce exploration cost and improve exploration benefit.

关 键 词：单探针 MDT测试 DST测试 试井解释 产能 压力 流度 

分 类 号：TE353[石油与天然气工程—油气田开发工程]