--> --> Abstract: Fault Facies Modelling - a Practical Approach to Incorporating 3D Fault Architecture in Standard Reservoir Models, by Jan Tveranger, Alvar Braathen, Nestor Cardozo, Magne Espedal, Niclas Fredman, Haakon Fossen, Henning Nøttveit, Per Røe, Arne Skorstad, Harald Soleng, and Anne-Randi Syversveen; #90072 (2007)
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Previous HitFaultNext Hit Facies Modelling - a Practical Approach to Incorporating 3D Previous HitFaultNext Hit Architecture in Standard Reservoir Models

Jan Tveranger, Alvar Braathen, Nestor Cardozo, Magne Espedal, Niclas Fredman, et al.
Center for Intergrated Petroleum Research (CIPR), University of Bergen, Bergen, Norway

Present methods for including faults in reservoir simulation models largely disregard the fact that Previous HitfaultNext Hit impact in reservoirs is commonly not limited to a single, clear-cut Previous HitfaultNext Hit plane but affects a volume of host rock, thereby creating a complex 3D architecture significantly influencing fluid flow. By failing to incorporate the presence of often extensive Previous HitfaultNext Hit damage zones and Previous HitfaultNext Hit core architectures into the reservoir model: -actual 3D flow inside and through Previous HitfaultNext Hit zones is not captured -in-place volumes are overestimated -Previous HitfaultNext Hit sealing (including capillary seals) is highly simplified -communication along faults can not be forecast -model uncertainty cannot be properly evaluated as Previous HitfaultNext Hit features critical for reservoir behaviour are not included in the model -hazardous areas for drilling can not be reliably predicted
The Previous HitFaultNext Hit Facies project has developed a practical methodology that allows volumetric gridding of Previous HitfaultNext Hit zones on reservoir scale models and populating the resulting Previous HitfaultNext Hit envelopes with realistic Previous HitfaultNext Hit architectural elements and petrophysical properties. Models are built using a standard reservoir modelling tool (Irap RMS) employing a customised gridding algorithm in HAVANA. Architecture and petrophysical properties of the Previous HitfaultNext Hit zones are modelled by adapting facies model tools developed for object based modelling of sedimentary facies and employing volumetric strain as a conditioning parameter for the resulting Previous HitfaultNext Hit zone architecture and petrophysical properties. The new method is fully integrated with existing modelling workflows and offers a practical solution to evaluation of Previous HitfaultTop impact on reservoir fluid flow in realistic detail.

 

AAPG Search and Discovery Article #90072 © 2007 AAPG and AAPG European Region Conference, Athens, Greece