Dealing with Sparse and Heterogeneous Data in the Characterization and Modeling of a Green Fractured Carbonate Reservoir

This Middle East case study addresses the modelling of a Type 2 (Nelson, 2001) green carbonate reservoir which production is acknowledged to be largely controlled by fractures. In the case of an undeveloped reservoir the main challenge is posed by the limited amount of hard data and production history. The ultimate objective was to minimize production forecast uncertainties. This was achieved by means of a customized workflow that integrates 3D seismic, well and production data to predict fracture distribution and flow control in the reservoir. The calibration against dynamic data indicated overestimation of the original values of fracture properties. Changes were applied thorough an iterative workflow that aimed to preserve both original distribution and contrast in the seismically constrained fracture model.