页岩气储层测井评价及进展

Well-logging Evaluation in Shale Gas Reservoir and Its Advances

页岩基岩孔隙度和渗透率极低,90%以上的页岩气储层需要经过压裂改造才能生产。根据2008年以来与页岩气储层测井评价有关的大量文献,综述了页岩气储层的地质特点,简介了页岩气储层岩心分析技术进展和适用的测井方法。概括给出了适用条件下的测井总有机碳、成熟度指数、岩石力学参数计算方法和裂缝评价方法。探讨了页岩气储层测井评价存在的问题及未来研究可行的发展方向,认为有必要建立信息全面的产气页岩典型样本数据库。

Shale gas reservoir log evaluation differs from that of conventional gas reservoir be- cause over 90 % of shale gas reservoirs need fracturing and the shale bed rock has ultra low poros-ity and permeability. On the basis of researches on a great number of articles about shale gas res-ervoir log evaluations since 2008, summarized are geologic characteristics of shale gas reservoir, and introduced are the advances of the reservoir core sample analysis technology and suitable log-ging methods in shale gas reservoirs. Provided are not only the calculation methods of log total organic carbon （TOC）, maturity index （MI） and the parameters of rock mechanical properties, but also the fracture evaluation method. Discussed are existing problems in shale gas reservoir log evaluation, and provided is the feasible developing direction in future research. It is believed that it is necessary to build a full information sample database for shale gas reservoir.