2D Seismic Reflection Data Interpretation of Meyal Area Integrated with Reservoir Characterization by using Wireline Data and Seismic Attribute Analysis

Abstract

The present study pertains to the structural and stratigraphic interpretation, attributes analysis, and petrophysical analysis using seismic and well logs data of Meyal area. The data used for this study consists of Seg–Y data and well logs data of Meyal area provided by the Department of Earth Sciences Quaid-i-Azam University Islamabad. Meyal area lays in the eastern Potwar is known for its hydrocarbon (oil and gas) structural traps. Meyal oil field is located in Eastern Potwar of Pakistan. The Seismic lines were acquired and processed by POL. For interpretation of these seismic lines three reflectors and reverse faults were marked by using the interactive tools of Kingdom software. In this way time section were obtained. After time to depth conversion the true structural geometry was obtained in the form of depth sections. The marked horizons were identified using formation tops from wells and their depths were confirmed through correlation with synthetic seismogram from Density log (RHOB) and Sonic log. After generating fault polygons, time grids and depth grids of marked horizons were prepared. From time and depth grids time and depth contour maps of the horizons of interest were generated to understand the spatial geometry of the structures and the nature of geological structures as identified by the seismic section of the area. Three dimensional surfaces are also generated to further confirm these anticlinal structures. Reverse faulting as identified on seismic sections confirmed compressional tectonic regime in the study area resulting due to Indian Eurasian plate’s collision. The seismic interpretation of these lines showed pop-up structures and snaked head bounded by reverse faulting. These pop-up structures were favorable places for hydrocarbons accumulation and extraction. Seismic attributes analysis of seismic section helps in identifying the different lithological boundaries and further confirmed the structural and stratigraphic interpretation and petroleum play of the study area. The Petrophysical analysis of Meyal-05 and Meyal-08 for the selected zones of the interest showed reservoir quality of different formations.