The reservoir characterisation of Karachaganak Lower Permian pinnacles has been performed using an object modeling workflow, differentiating massive bioherm facies vs. bedded facies. The integration between geological data and dynamic data allowed, through dynamic simulations, a revision and tuning of geological concepts and assumptions. This approach allowed describing the fast pressure decline observed at wells with a geological meaningful model. The former use of local compartments, not geologically supported and just defined “a posteriori” to hit the History Match, has been dropped and a Reservoir Model, statistically reliable for the not appraised areas, has been defined.


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