2D Seismic Data Interpretation and Petrophysical Analysis of Amirpur Oil Field, Upper Indus Basin, Pakistan

Abstract

The main aim of this research work is to understand the Petrophysical and Structural aspects of our study area which is Amirpur by using Well log and Seismic Data. Our research was divided into two steps. The first step was to perform the seismic interpretation and the second step was petrophysical analysis. The seismic interpretation consisted of base map generation, control line selection, TD chart generation and lastly horizons and faults picking. For the purpose of understanding the structural framework of the subsurface geology TWT contour maps were prepared for the Eocene formations. Upon interpreting the seismic line with contour maps, we got to know that there was the presence of a triangular zone which was bounded by a back and fore thrust with the basement decollement (SRT). The trapping mechanism in our area turned out to be structural. In petrophysical analysis, we were provided with Well Log Data and four Seismic Lines of Amirpur-01 by LMKR by consent of DGPC. Petrophysical analysis showed that two reservoir zones were present in our research area i.e. Sakesar Limestone and Chorgali Formation with sonic porosity 1.76% and 2%, effective porosity of 1.57% and 3.86%, a saturation of hydrocarbons 34.5% and 58.85% and the saturation of water is 64.2% and 41.05% respectively.