Source Rock Potential and Thermal Maturity of Datta Shale Using Well Logs Data of Chanda Deep-01 well, Upper Indus Basin, Pakistan

Several models have been developed in past years to evaluate thermal maturity and calculate total organic content of source rocks using wireline log data. An attempt is made in this current paper to apply one of these models to assess the hydrocarbon and source potential of Jurassic age Datta shales in Chanda Deep-01 through wireline logs and PetroMod-1 software. The extensive Datta shale in Upper Indus Basin serves as potential source and reservoir for unconventional and conventional oil and gas reservoirs. It has good geochemical parameters, which makes it attractive for exploration. Well logs depict various properties of source rock which is treated as Total Organic Carbon (TOC) content. Passey et al. (1990) overlay "Delta logR" technique has been adopted for TOC calculation in Datta shale. This method resulted in TOC ranging from 1.3-2.0 wt. %, which shows fair good source potential. The comparative similarities between the TOC calculated from logs and through the method of Geochemistry have been observed which validates our finding. Also, Datta shale is mature for hydrocarbons generation and fall in oil window based on VR data obtained by using PetroMod 1 software.