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