Geochemical characterization of sediments samples of Sembar Formation from three different wells of Southern Indus Basin

Sediment samples from three boreholes namely Paniro-II, North Akri, and Bhadmi of Sembar Formation, Southern Indus Basin were geochemically analyzed. The Soxhlet extracted bitumen were fractionated by column chromatography. The saturate fractions were further analyzed to evaluate type and quality of organic matter (OM). Total organic carbon, determined by a wet combustion titration method, indicates fair-to-good source rock potential. The plot of isoprenoids/n-Alkanes shows a mixed source of OM. Pristane/Phytane values and distribution of hydrocarbons showed dysoxic depositional environment. Carbon preference indices suggested increase in maturity with depth.