• 责任者：Ma Xujie (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhou Wen
• 刊名：Journal of Chengdu University of Technology
• 出版年：2013
• 卷期：40(5)
• 关键词：页岩气 ; shale gas ; 油气勘探 ; petroleum exploration ; 四川 ; Sichuan Province
• 页码：p.562-568
• 图表：7 illus., 1 table, 12 refs.
• 分类号：1003
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

     The shale rich in organic mass is widely developed in Middle Jurassic Qianfoya Formation of West Sichuan and North Sichuan. Its buried depth is relatively shallow and can be used as favorable continental shale gas exploration strata in Sichuan Basin. Based on the petrophysical analysis of core data and log data, the electrical standard to indentify the shale rich in organic mass is established. The thickness and depth distribution map of shale rich in organic mass made by using the statistics and division results and sedimentary background shows that the shale thickness is generally 70 m, the depth is mainly 2 km and the distribution is relatively stable. This set of shale has good conditions to form shale gas reservoirs. The organic mass types of the shale are mainly Type Ⅱ and Type Ⅲ , few Type Ⅰ. The abundance of organic matter is generally low, but higher in the area between Langzhong, Nanchong and Chengdu in the central region and in the area from Dazhu to Liangping in the southwestern region. The mass fraction is generally more than 1.5%. The evolution of organic matter （Ro） in the northern is relatively modest. It is generally 1.0%- 1. 2% and is lower in the southern, generally 0.6--0.8%. Based on the distribution, depth, and geochemical characteristics of the shale, this paper indicates that the favorable areas of shale gas exploration and direction are mainly distributed over the ＂L＂ shape area between Mianyang, Langzhong, Bazhong and Nanchong.