Petroleum geochemistry of the Potwar Basin, Pakistan: 1. Oil-oil correlation using biomarkers, δ13C and δD

► First study of its nature on oil correlation of Potwar Basin (Upper Indus Basin, Pakistan). ► Biomarkers and bulk stable isotopes reveal three oil families. ► Marine oxic/suboxic and deltaic oxic depositional environment of organic matter. ► Marine, marine mixed with little terrigenous and terrigenous source oils. ► Low level of biodegradation in similar thermal maturity oils.