Fluid-Solid Coupling Physical Experiments and Their Implications for Fracturing Stimulations of Shale Gas Reservoirs
Kang Yongshang
Deng Ze
Wang Hongyan
Liu Honglin
Yuan Chunlin
Zhao Qun
Abstract：The mechanisms of permeability variations and fracture extension are essential for hydraulic fracturing design in shale gas exploitation.Based on fluid-solid coupling physical experiments and Micro-CT imaging analysis,this study reveals two im-portant phenomena:(1)loading-unloading-reloading cycle has an effect on increasing the permeability of shale samples,(2) during the reloading process,the permeability of shale samples show different trends with increasing axial pressure.In the per-meability increasing case with increasing axial pressure,the fractures are produced directionally and orderly.In another case, the fractures are produced disorderly and locally mylonitic.The results show that (1)pumping-intermission-repumping multi-cycles could help modify the stimulation effect of in-site fracturing operations,and (2)hydraulic fracturing volume should be appropriately controlled for naturally fractured shale gas reservoirs.
Keywords：shale gasfluid-solid coupling effectphysical experimentpermeabilityCT imagingfracturing stimulationpe-troleum geology
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1376-1383 )