Reservoir-forming conditions of shale gas in Badaowan Formation in Fukang area, Xinjiang

In order to evaluate the potential of shale gas of coal measures in Fukang area, Xinjiang, taking the shale of Jurassic coal measures in Badaowan Formation as an example, the study was carried out and the favorable accumulation area for shale gas was preliminarily put forward according to the drilling, core data and sample analysis results in this paper. The result shows that the accumulative thickness of Jurassic Badaowan Formation shale is big(200-400 m), the buried depth is shallow(<1 500 m), the organic carbon content is high(average TOC>2.0%), mainly of type Ⅲ and Ⅱ2, thermal evolution level is moderate(R_ran is 0.8%-1.1%, mature), physical property of reservoir are relatively good, micro-nanoscale pores are relatively developed, clay mineral content is high, brittleness index is low and the gas content is low(average 1.4 m³/t). After comprehensive analysis, it is concluded that Badaowan Formation in Fukang area has good reservoir-forming conditions for shale gas. On the basis of above studies, it is proposed that Fukang-Mu 7 well-Miquan-Changji area is a favorable accumulation area for shale gas in coal measures in this area.