Document Type

Conference Paper

Publication Date


Publication Details

Lei Zhang, Xiaochuan Yuan, Naj Aziz and Yongcheng Liu, Experimental study on stress-seepage characteristics of fractured shale from the Longmaxi Formation in China, Proceedings of the 2024 Resource Operators Conference, University of Wollongong - Mining Engineering, February 2024, 229-236.


Effective shale gas production requires modification of gas reservoirs. By constructing a multi-level fracture network spatial structure, the porosity and connectivity of the rock formations are improved, promoting reservoir permeability and increasing the production of shale gas wells. This study conducted seepage tests on fractured rock mass samples from the Longmaxi Formation, China, under various stress conditions using nitrogen gas. The pore fluid pressure, effective stress and confining pressure effects on volume permeability were analyzed, and stress-seepage relationships for fractured shale samples were obtained. The permeability of fractured rock samples under study at fixed confining pressure for nitrogen gas followed a good quadratic function relationship with the inlet gas pressure. With increased inlet pressure, the permeability first dropped and then grew. The permeability variation trends of fractured rock samples under fixed confining pressure and fixed mean effective stress conditions were consistently V-shaped.