凤冈二区牛蹄塘组页岩气成藏特征分析  

Analysis of Shale Gas Reservoir Formation Characteristics in the Niutitang Formation of Fenggang 2th Zone

作　　者：钟蜜 Zhong Mi(Jiangsu Changjiang Geological Exploration Institute,Jiangsu Nanjing 210046)

机构地区：[1]江苏长江地质勘查院,江苏南京210046

出　　处：《山东煤炭科技》2024年第4期128-133,共6页Shandong Coal Science and Technology

摘　　要：贵州黔北地区页岩气研究程度较高而凤冈地区研究程度较低,为进一步了解凤冈二区页岩气成藏特征,以凤冈二区下寒武统牛蹄塘组为目标层位,通过对富有机质页岩样品的XRD全岩衍射及黏土测试、压汞测试、显微镜观察、等温吸附等化验测试数据分析,结合区内已施工钻孔、二维地震勘探成果、钻孔地球物理测井等相关资料,对区内下寒武统牛蹄塘组页岩气成藏条件及成矿规律进行了综合研究,认为区内牛蹄塘组有机质类型为I型,演化程度类别为高,区内构造以逆断层为主,局部构造相对简单,地层生气、储气条件良好,具有较好的页岩气成藏条件,且区内越往东南部,成藏前景越有利。The research degree of shale gas in Guizhou Qianbei region is relatively high,while the research degree in Fenggang region is relatively low.In order to further understand the reservoir formation characteristics of shale gas in Fenggang 2th zone,the Lower Cambrian Niutitang Formation in Fenggang 2th zone is taken as the target layer.Through XRD whole rock diffraction,clay testing,mercury intrusion testing,microscopic observation,isothermal adsorption and other chemical examination test data analysis of shale samples with rich in organic matter,combined with the relevant data such as constructed boreholes,two-dimensional seismic exploration results,borehole geophysical logging and so on in the area,a comprehensive study is conducted on the shale gas reservoir formation conditions and mineralization laws of the Lower Cambrian Niutitang Formation in the area.It is found that the organic matter type of the Niutitang Formation in the area is Type I,with a high category of evolution degree.The structures in the area is mainly reverse faults,and the local structures are relatively simple.The gas generation and storage conditions of the stratum are good,with good conditions for shale gas reservoir forming.Moreover,the more southeast the area is,the more favorable the reservoir forming prospects are.

关 键 词：页岩气 有机质丰度 有机碳含量 牛蹄塘组 

分 类 号：P618.13[天文地球—矿床学]