Prospects do we have in the Offshore basin of Pakistan and the Balochistan Basin!
In Potwar Patala shale (Paleocene) is the source rock. Salt Range Fm (Neoproterozoic) also reportedly contains random high TOC pockets, but salt being not permeable would inhibit the movement of generated hydrocarbons. In rest of Pakistan, except Balochistan Basin (west of Ornach-Nal-Chaman faults), Sembar shales (Lower Cretaceous) are considered as the source rock. Habib Rahi (Eocene) reportedly contains some higher TOC in Sulaiman Range and might be mature in the foredeep, but not yet proven.
Any depression can act as a source chenk source rock, enabling it to generate hydrocarbons. There are no names as such. In Potwar the main kitchen is Soan syncline, and other depressions between the anticlines may also act as kitchen, under the required temperature-pressure conditions. The Kirthar and Suliaman foredeeps are considered to feed the traps on their either side. Sui field has its own kitchen right beneath the Sui dome, which fed the surrounding structures also. Badin area represents horst-graben structural geometry, where grabens would act as kitchen.
In Pakistan the age of proven reservoirs ranges from Miocene to Cambrian. Offshore Indus has potential for gas. One of the wells produced 3 MMcfd gas from Miocene sands, and gas shows were encountered in some other wells. A systematic exploration campaign is required to fully evaluate the area; so far the efforts had been random.
Offshore Balochistan represents the subduction zone which are not considered suitable places for hydrocarbon accumulation.