Fracture Study Using Seismic Attributes, Simulated Petrophysical Properties and Geological Setting of the Study Area

The natural fracture systems can have a striking impact on reservoir performance. In this study, several seismic attributes sensitive to fracture system, have been applied on 3D seismic data in reservoir part. Seismic attributes illuminate features within the original seismic data that correlate with faulting and fracture corridors. Ant tracking method as one of the best candidates for displaying fracture system has been investigated. In addition structural model of the study area has been constructed in Schlumberger Petrel software. Then, porosity of reservoirs has been simulated by SGS method in order to correlating porosity maps with fracture maps.

Main tectonic forces of the region can manifest the orientation of folds, faults and fracturing system. In Middle Cretaceous a significant transgressive phase which is marked by the deposition of the carbonates, has formed reservoir zones. Salt movements and diapiric effects have operated as the main cause of fracturing system. By integrating attribute study results, simulated porosity results and geological setting of the region, fracture system of the reservoir has been interpreted in seismic scale. It has been shown that fractures are particularly along the crest of structures and their orientations are either parallel or perpendicular to the axis.