Taking the shale reservoir as the starting point

Tiansheng standard section is selected as the research object by the survey and optimization of the areas with simple structure

well-developed outcrops

fully developed strata and convenient transportation in Fuling

Nanchuan and Wulong areas. The shale heterogeneity of the outcrop is characterized in the aspect of stratigraphy

mineralogy

petrography

organic geochemistry and storage space

combined with pre-existing seismic

drilling

logging

and laboratory petrophysical and geochemical analyses. The research results show that this section is located in an area of relative stable structure has good horizontal comparability

of which each small layer has typical development characteristics and the thickness changes little. It is a representative and typical observation and research section

which can be used as a reference base for shale scientific research and teaching in Sichuan and Chongqing Region. Meanwhile

it is pointed out that the development of bentonite interlayer has a certain influence on shale quality and shale gas well fracturing. This method of the surface indicating the underground provides a certain guiding significance for the efficient development of shale gas wells.