Buildup Test Analysis in Naturally Fractured Oil Reservoir

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Naturally fractured reservoirs have a significant share of the world’s hydrocarbon resources however, they represent one of the most daunting challenges reservoir engineers can deal with. This paper presents how to identify and model the naturally fractured reservoirs (Dual porosity model) using the results of the build-up test. The paper starts by giving an overview on the meaning of naturally fractured reservoir then, the main objectives of the well-tests on this type of reservoirs including the main procedures of these tests after that, third section includes the mathematical formulations governing these tests. Three case studies are analyzed. One of these cases is analyzed using one of the industrial software which is called Ecrin (Saphir). The other two cases are analyzed using a spread sheet program which is developed for analyzing buildup test data from naturally fractured reservoir