Reliability of long-term production forecasts issued from reservoir simulations is strongly dependent on the quality of<br>reservoir models on which fluid flows simulations are run. In carbonate reservoirs, the usual difficulty for building<br>reliable models is emphasized by the natural complexity of the reservoirs : biological aspects of sedimentation<br>make very complex the reservoir architecture, which is usually overprint by early or late diagenesis and/or fracturing.<br>High perm streaks, as well as cemented barriers, that control well productivity and stability of displacement front<br>during production, are usually the result of such diagenetic overprint. Ignoring these geological features while<br>constructing reservoir models may lead to deliver models unable to match actual production history<br>and to carry out reliable production forecast.


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