页岩气储层渗透性测试方法对比分析  

Comparison and analysis of permeability testing methods on shale gas reservoir

作　　者：李智锋[1] 李治平[1] 王杨[2] 姜宝益[1] 宋兆杰[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石化胜利油田分公司技术检测中心,山东东营257000

出　　处：《断块油气田》2011年第6期761-764,共4页Fault-Block Oil & Gas Field

基　　金：国土资源部项目"中国重点地区页岩气资源潜力及有利区优先项目"(09GYXQ15)

摘　　要：由于页岩储层渗透率极低,难以应用常规渗透率测试方法进行测试。文中分析对比了介质测试的3种新方法:原地测试法、改良脉冲衰减测试法和解吸流动法。原地测试法可在拟气藏条件下测量渗透率,只需较少的测试时间,且对测试介质完整性要求较低;改良脉冲衰减方法测试时间与平均孔隙压力成反比,因此尽可能提高测试压力则能缩短测试时间,同时降低了对测试介质非均质性的敏感度,也降低了对测试介质孔隙体积估算的精度要求;由于页岩气中吸附气量占总气量的30%～80%,在页岩气开采中就必然存在气体解吸情况,运用解吸流动法则有利于理解和模拟储层气体解吸和气体转移的双过程。It is difficulty to use conventional method to measure the permeability because of very low permeability in shale reservoir. This paper analyzes several new methods of media test, including in-situ permeability method, modified pulse decay test method and desorption flow method. In-situ permeability method can measure the permeability under the condition of pseudo-gas reservoir. The required testing time is less and the demand of medium testing integrity is low. Because the testing time of modified pulse decay and average pore pressure present the inverse proportion, the testing time can be shortened through increasing test pressure as far as possible. At the same time, the sensibility of testing media heterogeneity is reduced and the estimation accuracy of media pore volume is also decreased. Adsorbed gas content takes up 30%-80% of total gas amount in shale gas, so gas desorption necessarily exists in the production of shale gas. Utilization of desorption flow method is favourable for the modeling of reservoir gas desorption process and gas transportation.

关 键 词：页岩气 渗透率 原地测试法 改良脉冲衰减测试法 解吸流动法 

分 类 号：TE377[石油与天然气工程—油气田开发工程]