The shale gas reserves in the Wufeng Formation-Longmaxi Formation of the Luzhou Block in southern Sichuan are substantial. Tectonic movements alter the ground stress

significantly impacting the exploration and development of shale gas. To optimize exploration areas for deep shale

methods such as seismic comprehensive data

ancient structural maps

and rock mechanics parameter testing have been employed. Additionally

neural network algorithms and geological mechanics modeling analysis have been used to invert the stress field of ancient geological structures across multiple stages within the study area and to predict the development of reservoir fractures influenced by stress. The research indicates that numerical simulation methods and neural network algorithms effectively invert the crustal stress field across multiple stages. Tectonic movements have altered the crustal stress

concentrating it in the stratigraphic anticline. Here

the core of the anticline

affected by strong tectonic activity

is fractured

gradually releasing stress. The ongoing multi-stage tectonic movements have facilitated changes in the stress of the reservoir rock

making the fracture zone conducive to fault formation with decreasing stress over time. Around the original faults

crack development is pronounced

leading to stress attenuation zones prone to numerous

short

small cracks. The current stress field

shaped by multiple tectonic periods

presents a complex distribution and irregular crack development

significantly influencing shale gas drilling and development. These findings offer valuable insights for the exploration and development of deep shale gas.