Shale Gas Reservoir Characteristics of the Wufeng-Xintan Formation in Well Banzhu-1 in Northern Guizhou
The Wufeng formation of Late Ordovician to the Xintan formation of Early Silurian black shale is an important shale gas exploration and development horizon in northern Guizhou.In order to further explore the pore control factors and the reservoir characteristics,for the Banzhu well 1 in northern Guizhou,the sedimentary sequence,organic geochemistry and reservoir physical properties were studied.The results show that the main pore types of the reservoir are organic pores,intra-granular pores,the results showed:the pore types of the Wufeng formation are mainly organic matter pores,with good pore connectivity and large adsorption capacity;The pore types of the Longmaxi formation are mainly organic matter pores and intergranular pores,with good pore connectivity,but low total porosity and small adsorption capacity;The pore types of the Xintan formation are mainly intragranular pores,intergranular pores and micro-cracks,and the pore connectivity is relatively poor,and the adsorption capacity is small.There is a good correlation between organic carbon and porosity,which can provide support for shale gas exploration and downhole lateral prediction in the complex structural ar-ea of northern Guizhou.
万方数据
维普
