Controls on reservoir stresses during production: results from coupled fluid flow – geomechanical model

Sergey Skachkov and Josep Segura Serra and Quentin Fisher. ( 2008 )
in: 28th gOcad Meeting, ASGA

Abstract

In this paper we present the results of an extensive series of 3D numerical analyses conducted using code which couples a reservoir simulation model to a geomechanical modelling code. An MPI interface was set up to link TEMPEST reservoir simulator (Roxar Ltd.) with the ELFEN geomechanical finite element code (Rockfield Software Ltd.). This allowed us to obtain the coupled solution of fluid flow and mechanical problem. Several interesting geomechanical problems were investigated. In particular, the evolution of the stress path is analysed during pressure drawdown. Three different regions might be distinguished during elastic, transitional, and plastic compaction. Simulation of faulted model is performed in order to predict possible fault reactivation. Mohr circle evolution is analysed for models with faults with different friction coefficient. It is also shown that stress arching is controlled by reservoir geometry and by stiffness contrast between reservoir and its surroundings.

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    BibTeX Reference

    @inproceedings{SkachkovRM2008,
     abstract = { In this paper we present the results of an extensive series of 3D numerical analyses conducted using code which couples a reservoir simulation model to a geomechanical modelling code. An MPI interface was set up to link TEMPEST reservoir simulator (Roxar Ltd.) with the ELFEN geomechanical finite element code (Rockfield Software Ltd.). This allowed us to obtain the coupled solution of fluid flow and mechanical problem. Several interesting geomechanical problems were investigated. In particular, the evolution of the stress path is analysed during pressure drawdown. Three different regions might be distinguished during elastic, transitional, and plastic compaction. Simulation of faulted model is performed in order to predict possible fault reactivation. Mohr circle evolution is analysed for models with faults with different friction coefficient. It is also shown that stress arching is controlled by reservoir geometry and by stiffness contrast between reservoir and its surroundings. },
     author = { Skachkov, Sergey AND Segura Serra, Josep AND Fisher, Quentin },
     booktitle = { 28th gOcad Meeting },
     month = { "june" },
     publisher = { ASGA },
     title = { Controls on reservoir stresses during production: results from coupled fluid flow – geomechanical model },
     year = { 2008 }
    }