2-D Seismic Reflection Interpretation of Line 2001-SNJ-02 (SP: 760-1099) of Sinjhoro Area (Southern Indus Basin) & Rock Physics Analysis

Abstract

Seismic line, 2001 -SNJ-02 (SP: 760-1100) of Southern Indus Basin, was provided by the Department of Earth Science, Q.A.U Islamabad for interpretation. To investigate the lateral and vertical variation in the velocity, average velocity and Iso velocity map was generated. A time section was produced from the seismic section using the shot points and the two-way-times (TWT) of the reflectors and faults. These average velocities were then used to find the depths of the formations for the Geoseismic Section or Depth Section. For the interpretation of seismic data five reflectors are marked on the seismic section and named on the basis of nearby wells (Chak 63-01) in Southern Indus Basin which are Reflector 1 (Possible Laki Formation), Reflector 2 (Possible Ranikot Formation) , Reflector 3 (Possible Khadro Formation), Reflector 4 (Possible Basal Sand) and Reflector 5(Possible Chiltan Limestone). Interpretation results indicate normal faulting in the Southern Indus Basin. Different physical properties of the rocks are calculated and establish their relationship with depth. Reflection coefficients are calcu lated on different shot points and with the help of reflection coefficients lithologies are marked.