Abstract
ABSTRACT A new fully coupled numerical model is presented to analyze artificial fracture morphology and artificial fracture propagation during synchronous fracturing. The interaction mechanism between natural and artificial fractures is also considered in this new model. The new numerical solution, based on the boundary element method (BEM) and the finite difference method, is used to solve the problem of coupled rock deformation, fluid interference, stress interference, interface slipping, and opening and to investigate the effect of natural fractures and interference between fractures on fracture morphology during synchronous fracturing. An analysis of factors of influence showed that synchronous fracturing can be used to control the fracture trajectory and construct an effective enhanced geothermal system (EGS). Artificial fractures of two adjacent wells attract each other during synchronous fracturing, and eventually, the two fractures become connected, and the two wells become connected. The choice of well location also has an important influence on the successful establishment of an EGS. To establish an effective EGS successfully, the fracture spacing should preferably be no more than 20 m, and the well spacing should preferably be greater than 400 m. An EGS is easier to construct in a hot dry rock reservoir with a high natural fracture density and small natural fracture angles (preferably less than 30º).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
Disclaimer: 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.