2D SEISMIC INTERPRETATION AND PETROPHYSICAL ANALYSIS OF SINJHORO BLOCK, SANGHAR DISTRICT, LOWER INDUS BASIN, PAKISTAN

Abstract

This dissertation supports the interpretation of 2D seismic data and the petrophysical analysis of seismic lines in Resham-01 well in the Lower Indus Basin, Pakistan. sResham-01 is located in Tehsil Sinjhoro, District Sanghar. The data sets provided by OGDCL include GR data sets, resistivity, SP and Sonic data sets. Three reflectors are marked, which represent the Parh formation, Basal sand of Lower Goru formation, and Massive sand of Lower Goru formation. Reflectors were identified with the help of T-D chart. The reflectors marked were all of early to late cretaceous. After that converting the time into depth with the help of average velocity. in the area, horst and graben structures were observed from time and depth surfaces of all the three marked formations. Fault seal analysis was also performed using one of the faults (F3) using the methodology of Allan mapping technique, juxtaposition diagram, Shale Smear Factor (SSF), and Shale Gouge Ratio (SGR). The results of the fault seal analysis showed that there can be fair sealing along this F3 fault. Afterwards petrophysical analysis was performed for determination of average porosity, effective porosity, saturation of hydrocarbons and saturation of water. On the basis of petrophysical analysis of the area, there is no potential hydrocarbon reservoir in this area.