Coupled fluid flow and elasto-plastic damage analysis for fractured porous chalk with induced wormhole

摘要: Abstract Acid injection in a carbonate oil reservoir can increase recovery by etching part of the fractured porous and generating conductive channels (“wormholes”), which creates an easier path for production. However, it is crucial to predict wormhole strength their failure successful acid treatment. For this purpose, continuum-based computational method developed. The model includes flow chalk reservoir, reversible irreversible deformation fractures, are modeled with equivalent elasto-plastic damage constitutive model. coupling between done explicit method. results found that risk wormhole's walls higher if natural fractures oriented along wormhole; however, larger dip angles inclinations respect rock failure. Results shows increased fluid production from wormhole, be result further treatments, developing behaviors reduces fracture asperity at tip, addition increasing wall deformation, eventually leading occlusion.