Reservoir Physical Characteristics of Shale Gas in Longmaxi Formation in Southeastern Chongqing
CHEN Qiao1, TAN Yanhu1, WANG Lisha1, WANG Sen1, LIAO Kaigui1, LIU Hong2, YAO Guanghua3, WANG Qijun4, YANG Bo5
1. Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China;
2. Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China;
3. Chongqing Mineral Resources Development Co. Ltd, Chongqing 400042, China;
4. School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China;
5. Engineering Supervision Center of Southwest Branch Co., China Petrochemical，Deyang 618000, Sichuan Province, China
Abstract：The physical experiments on the shale outcrop core in the Longmaxi formation in southeastern Chongqing show that the Porosity variation is in the range of 1.5%~2.5%, the permeability is in the range of 2.5×10-4～1.3×10-3mD; the Shale beddings and the dispersion phenomenon are clearly seen, but their extents gradually increase with the angle of bedding, and the wave velocity decreases. The pore size distribution is changed, with less large pores, basically with no micro pore, and with a large capillary force. The rock quartz content is high, the clay content is relatively low, as typical of the hard brittle shale. At the same time, the clay is dominated by illite, with a small amount of chlorite and illite/smectite mixed layer, not including montmorillonite, the expansion extent is small, the brittle shale parameters are between 0.49～0.77, the average value is 0.58. Test results provide some guidance for the shale mining method selection, the instability mechanism and the fracturing fluid design scheme in the shale gas development in the region.
陈乔, 谭彦虎, 王莉莎, 王森, 廖开贵, 刘洪, 姚光华, 王其军, 杨波. 渝东南龙马溪组页岩气储层物性特征[J]. 科技导报, 2013, 31(36): 15-19.
CHEN Qiao, TAN Yanhu, WANG Lisha, WANG Sen, LIAO Kaigui, LIU Hong, YAO Guanghua, WANG Qijun, YANG Bo. Reservoir Physical Characteristics of Shale Gas in Longmaxi Formation in Southeastern Chongqing. journal1, 2013, 31(36): 15-19.
2013, Vol. 31 
