SUBSURFACE STUDIES OF MISSAKASWAL AREA USING 2D SEISMIC AND WELL DATA

Abstract

Two dimensional seismic interpretation has been carried out in Missakeswal area located in Chakwal district of Punjab province, Pakistan to reveal the subsurface geology. The data used for this study was provided by department of Earth Sciences, the main purpose of this dissertation is the seismic structural interpretation of the Missa Kaswal area in order to demarcate the probable zone for the accumulation of hydrocarbons. Seismic structural interpretation includes marking of reflector with the help of synthetic seismogram, fault picking, generation of polygon and time and depth contour map. To complete this dissertation SMT Kingdom 8.8 were used. The study area is located in Potwar Basin, pop-up anticline is major structure. Five seismic lines GO-994-GNA-09, 994-GNA-10,994-GNA-15,994-GNA-16,994-GNA-19,994-GNA-08 and Qazian Well-01 are used. For the interpretation of the seismic lines, three reflectors are marked by correlating synthetic seismogram on seismic section. Prospect evaluation (including gridding, Time and Depth contouring and identification of structural traps) has been carried out using Kingdom suit of Software. Structural interpretation has identified pop-up and snaked head structures favorable for hydrocarbon accumulation and is marked on seismic sections and time contour maps. These structures have been marked at Chorgali, Sakesar and Nammal formations of Eocene level, which are acting as reservoir rocks in the study area. The horizons are identified and named on the basis of well and generalized stratigraphic data.