Quantitative Characteristics of Micro Bedding Fractures in the Wufeng–Longmaxi Formation Based on High-Resolution Map Imaging Technology

The study of microfractures in shale is mainly based on qualitative description. Conversely, quantitative description the parameters can provide a basis for fracture characterization and physical properties. Nine reservoir samples Wufeng–Longmaxi Formation Jiaoshiba area were studied, using backscattered two-dimensional multiscale resolution imaging technology, combined with high-resolution map technology (MAPS), thousands images obtained scanning electron microscopy. Gray image analysis was used to extract microfracture information from (2 × 2 cm multiresolution). “maximum circle method” calculate length aperture characteristics fractures. Parameters such as bedding fractures, surface rate linear density fractures by integration apertures. between 2~7 mm, 1~6 μm, 1~6/m 1%. do not contribute much porosity reservoir; however, reservoirs high have development good permeability. controlled lithology within reservoirs. Different types contain different but they certain regularity. Moreover, content organic matter TOC (total content) control fracture, where are accompanied number