Interpretation of 2D seismic reflection data of Sinjhoro block, Sanghar area, Sindh, Pakistan (P-1051) (MFN 3025)

Abstract

This dissertation contains the study and interpretation of 2D seismic reflection data of selected seismic lines of Sinjhoro Exploration Lease (E.L.), Southern Indus Basin, Pakistan. The main objective of this research was delineation of subsurface structures favorable for hydrocarbon accumulation. This Exploration Lease is situated in the Sanghar District of Sindh Province and is licensed to Oil and Gas Development Corporation Limited (OGDCL). The seismic data for this dissertation was provided by the Land Mark Resources (LMKR) by the permission of Directorate General of Petroleum Concessions (DGPC). The data comprised four seismic lines, base map and well tops of well CHAK 63-01. The names of lines obtained are: (2001-SNJ-02, 2001-SNJ-24, 2001-SNJ-20 and 2001-SNJ-21). Seven prominent reflectors (pink, purple, green, orange, yellow, blue and brown) were marked on the basis of their reflection character. They represent Laki, Parh, Upper Goru, Top Lower Goru, Basal Sands, Massive Sands and Chiltan respectively. Two-way time (TWT) was read from the seismic sections and average velocities were used to create TWT and Depth Contour maps and 3D Time and Depth Surfaces for all the marked horizons.