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Lower Indus basin:

Sulaiman Range and areas to the south constitute prolific gas producing habitat where Dhodak, Rodho, Sui, Pirkoh, Zin, Loti fields in the north, and in the plains Qadirpur, Kandhkot fields are gas producers. These fields produce from Sui Main Limestone (SML, Eocene), Ranikot sands, Dungan limestone (Paleocene) and the Pab sandstone (Late Cretaceous). In Kirthar Range again Sui Main limestone and mostly Pab sandstone is the reservoir. These regions are part of the Indus basin. Badin area and northern part of Sindh province also fall in Indus Basin where Lower Goru Sands (Lower Cretaceous) are the main reservoir for oil and gas. In all these areas, Sembar shales are considered as the source rock. Habib Rahi limestone (Eocene) is the gas reservoir in the giant Mari Field. Ghazij shale is the cap rock for SML while Ranikot shale provides cap rock for Pab. The intraformational shale within Lower Goru provides the seal.

In Punjab Platform area the Jurassic Samana Suk formation (Jurassic) and Lumshiwal sandstone (Cretaceous) are the main gas reservoir, where source rock has not been clearly defined. Chicali shale (Lower Cretaceous) provides cap-rock for the reservoir.

Upper Indus basin:

In Koht-Potwar, where mostly oil is found, the proven reservoirs are Muree formation (Miocene), Sakesar limestone (Eocene), Hangu and Lockhart (Paleocene), Lumshiwal sandstone (Cretaceous) Datta sandstone (Jurassic), Wargal formation and Tobra formation (Permian)and Khewra sandstone (Cambrian). The source rock in Kohat area is probably Chichali formation (Lower Cretaceous), and in Potwar, Patala shale (Paleocene) is considered as the source rock

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