Abstract

A Reservoir Geomechanics Workflow has been developed in order to evaluate the geomechanical effects caused by reservoir production in a fast, easy and accurate way. Whole reservoir geomechanics workflow is carried out inside a GOCAD environment that is comprised of three steps: the pre-processing (data set preparation); the running of the coupling program (coupled analysis) and; post-processing (results visualization). However, for practical purposes, a real reservoir simulation that takes account of the so-called geomechanical effects was carried out after solving three issues: finite element mesh construction; hydro-mechanical coupling and; processing time. The discretization of a finite element mesh of the reservoir and surrounding rocks is not trivial task using a conventional finite element pre-processor. Thus, a customized plug-in was implemented for the generation of finite element mesh in the program GOCAD (used in geological modeling). A reliable/robust partial coupling scheme was developed and implemented between a conventional reservoir simulator and a finite element program. The processing time spent on stress analysis (finite element program) was reduced through implementation of an in-house parallel finite element program that was written on GPU (Graphics Processing Unit).

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