Abstract:
The thesis involves the in-depth post well review of PakCan -01 weill Indus Offshorel Pakistan. The supplementary work includes the study of petroleum system including sourcel reservoirl seal/capi maturityI trapping mechanismsl and stratigraphy of Offshore Indus Basin as a whole. The presented work helps in the determination of lithologYI structurel and also the causes of failure of PakCan -01 Weill with prediction of hydrocarbon accumulationsl maturity and extent of source rocks. Offshore Indus Basin, Pakistan is by far the under-explored sedimentary basin of Pakistan. Ten
(10) exploratory wells have been drilled by the foreign oil companies but no economic discovery has been made so far, however only gas shows were observed in PakCan -01 well but these were not of economic significance. Cretaceous and younger stratigraphy is encountered in exploratory wells of Indus Offshore. Sembar, Goru, Mughalkot, Pab, Khadro, Bara, Laki -Gazij, Kirthar, Naril Gaj formations are encountered in wells explored followed by Siwalik Group. Shalesl limestonesl and argillaceous layers of Gaj, Naril Laki, Ranikotl and Mughalkot formations are main petroleum source rocks where as sandstones and limestones of Gaj, Nari, Kirthar, and Ranikot formations are acting as the main reservoir rocks in the basin. The intra-formational shales and compact limestones act as seal/cap rock. Isopach maps and migration fairway models are attached for better understanding of hydrocarbon generation and migration. A detailed post well analysis including well -velocity survey analysis, structural and stratigraphical interpretation, regional geological models, geothermal analysis, and burial history curves help in
