Sequence Stratigraphic Analysis of the Lower Cretaceous of South Pakistan

Sedimentological, chronostratigraphic, and sequence stratigraphic interpretations were integrated in order to predict four types of systems tracts, which were used as the building blocks of each interpreted sequence, which, in turn, were used in prediction the chronostratigraphic framework and depositional history of the Lower Indus Basin within the Jati Block. The study highlighted the importance of forced regressive sands of the Falling Stage systems Tract, as high-quality reservoirs encased in shelf mudstones, forming favorable targets for hydrocarbons due to the effective lateral and vertical seals and the expected maturity of intra-formational source rocks. Several lines of evidence support the frequent presence of these forced regressive sands as indicated from seismic attributes, well log sedimentology and sequence stratigraphy, well to well correlation, and from the established sequence models.