Separation of hydrocarbon reservoir zone using three-dimensional seismic data, wells and geomechanical parameters in one of the oil fields in southern Iran

Determining the hydrocarbon reservoir zone is one of the challenges for researchers in this field. So far, various approaches have been proposed in the field of hydrocarbon reservoir zoning. In the meantime, the question that arises is whether the potential of different zones of a hydrocarbon reservoir can be separated using geomechanical parameters? For example, in a sandstone reservoir, can the sandy and shale zones be separated? To answer this question, it is necessary to calculate some of the geomechanical parameters of the reservoir. Therefore, in this study, to obtain geomechanical parameters, three-dimensional seismic data of one of the oil fields in southern Iran were used along with the data of four existing wells. In this way, first inversion was performed on three-dimensional pre-stack seismic data, and three parameters, acoustic impedances (S and P waves) and density were extracted. Then, using the results of the inversion step, geomechanical parameters including elastic modulus, Lame parameters (LMR) and brittleness were calculated. In the next step, using the calculated geomechanical parameters, the reservoir zone was well separated from the non-reservoir zone in terms of hydrocarbon potential in time sections. Then, the calculated geomechanical parameters were verified using scatter diagrams and by comparing with the logs of the existing wells. The correlation value for the acoustic impedance was more than 90%.