The research work involves rock physics modeling and reservoir characterization of Suliman fold belt to sulamain fold depression. This area is a brighter zone for hydrocarbon exploration there are several discoveries of gas reserves in this area but there is still needed to estimate seismic characteristics of reflection amplitude properly for further discoveries. Therefore, in this research work we have estimated amplitude offset, inverse quality factor and reservoir characterization of Cretaceous and Paleocene strata of Dhodak-01 & 05, Savi Ragha-01 wells lie in Sulaiman fold belt and Litra formation of Ramak-01 well lie in Sulaiman Depression. To identify the production and reservoir zones. Second part of the research involves the sub surface stratigraphic correlation of Sulaiman fold belt to Sulaiman Depression. To quantify reservoir different well logs are used which are gamma ray log, neutron log, SP log, resistivity logs, sonic log, and density log. Based on different variation trend of well log curves of different zones of interest have been marked. Furthermore, inverse quality factor responses for gas reserves at different porosities showing that maximum variation is observed at low saturation of gas. Amplitude character is showing class three AVO trend which is showing that good hydrocarbon zone for gas reserves.