Abstract
Hydraulic fracture is an important technic for oil/gas production. A smeared cracked method is adopt for simulating hydraulic fracturing propagation within the framework of a fully coupled, pore pressure-solid phase interaction formulation. The stress-strain behavior of the solid phase is modeled as a porous media by using elasto-plastic, Drucker-Prager description. The inherent assumption of the fracture model is that the permeability can be expressed as a function of the difference between the mean effective stress and the tensile strength of the rock. For two-phase flow, the relative permeability is used for including the effect of fluid mixture between the original fluid and injection fluid. The rock sample with randomly distributed irregular hard inclusions is studied with the vertical stress, horizontal stress and pore pressure being 29.13 MPa, 19.77 MPa and 10.34 MPa, respectively. By running over 30 numerical cases, the characteristics of injection pore pressure and equivalent opening versus injection time are well simulated with different relevant dynamic viscosity, injection rate, intrinsic conductivity and tensile strength. Finally, the paper ends with some useful observations on the characteristics of hydraulic fracture.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
