下扬子地区二叠系页岩含气性特征分析  

Analysis of Gas Bearing Characteristics of Permian Shale in Lower Yangtze Region

作　　者：白玉坤[1] BAI Yukun(Shandong Lunan Geology Engineering Survey Institute(Shandong Geological Prospecting Bureau Second Geological Team),Ji’ning,Shandong 272100,China)

机构地区：[1]山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队),山东济宁272100

出　　处：《地质装备》2022年第3期41-45,共5页Equipment for Geotechnical Engineering

摘　　要：我国下扬子地区二叠系大隆组和龙潭组暗色泥页岩埋藏深度适中,发育厚度大,有机质含量高,但热演化程度较高,含气性特征不明确。位于安徽泾县部署的泾页1井终孔井深1247.30 m,揭露了二叠系大隆组、龙潭组暗色泥页岩51.13 m,黑色煤层5.80 m。通过随钻过程中岩心含气量现场解吸法对页岩含气情况进行分析,得到大隆组和龙潭组泥页岩含气量为0.013~9.329 m^(3)/t,平均总含气量为1.752 m^(3)/t。泾页1井钻井资料及气测录井成果揭示,下扬子地区二叠系地层具有一定的页岩气资源潜力,其中龙潭组可作为页岩气储集及赋存有利层位。The dark shale of the Permian Dalong group and Longtan group in the lower Yangtze region of China has moderate burial depth, large development thickness and high organic matter content, but the degree of thermal evolution is generally high and the gas bearing characteristics are not clear. The final hole depth of Jingye well 1 deployed in Jingxian County, Anhui Province is 1247.30 m, exposing 51.13 m dark shale and 5.80 m black coal seam of Permian Dalong group and Longtan group. The gas content of shale is analyzed by core gas content field desorption method while drilling. It is obtained that the shale gas content in Dalong group and Longtan group is 0.013~9.329 m^(3)/t, and the average total gas content is 1.752 m^(3)/t. Combined with the drilling data and gas logging results of Jingye well 1, the Permian strata in the lower Yangtze area have certain shale gas resource potential, and Longtan group can be used as a favorable reservoir for shale gas.

关 键 词：下扬子地区 二叠系 页岩气 含气性 

分 类 号：TE122.2[石油与天然气工程—油气勘探]