裂缝性地层测试压裂分析在川西须家河组的应用  

The Application of Mini-Frac Calibration for Fractured Reservoir in Xujiahe Group of West Sichuan Basin

作　　者：杨宇[1,2] 康毅力[1,3] 郭春华[4] 张凤东 

机构地区：[1]西南石油大学博士后科研流动站 [2]成都理工大学能源学院,四川成都610059 [3]油气藏地质及开发工程国家重点实验室,四川成都610500 [4]成都理工大学环境与土木工程学院

出　　处：《石油钻探技术》2006年第6期57-60,共4页Petroleum Drilling Techniques

基　　金：中国石化科技攻关项目"孝泉-新场-合兴场地区须家河气藏压裂工艺技术研究"(编号:XYK-2001-50-2)资助

摘　　要：川西地区须家河组砂岩气藏埋藏深,储层基质渗透率低,天然微裂缝局部发育,主要依靠大型加砂压裂工艺提高气井产量。为了解地层特征及为压裂优化设计提供必要的基础数据,在水力压裂施工前,采用测试压裂技术分析裂缝型地层的滤失系数、地层渗透率、闭合应力,计算近井筒区域的摩阻压力损失等参数。系统地介绍了裂缝性地层测试压裂分析的具体方法,结合川合148井的实例分析,对该方法在川西须家河组储层压裂设计中的应用进行了详细论述,为同类型储层的压裂优化设计提供了借鉴。The sand gas reservoir of Xujiahe Group, which is located in west Sichuan Basin, is characteristic of deep burial, low matrix permeability reservoir with heterogeneous natural micro fracture system, gas wells in this area are stimulated mainly by sand fracturing. The mini-frac calibration is available for identifying the leak-off coefficient , reservoir permeability , fracture closure pressure, and analyzing the value of entrance friction , which define much more valid parameters of target zone than that of conventional methods, and make much sense during the design of main-frac. Herein, the possible diagnosing methods for reservoir with nature fracture system have been summarized, and an example of the mini frac calibration for CH148 Gas Well in Xujiahe Group of.West Sichuan Basin is elaborated in details, which provide reference for optimum design of mainfrac operation in other similar reservoir.

关 键 词：裂缝性储集层 小型压裂 G函数 摩擦损失 川合148井 

分 类 号：TE375[石油与天然气工程—油气田开发工程]