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Abstract

Over time, Neoproterozoic rocks in Pakistan have intermittently attracted the interest of oil and gas exploration companies. However, despite these rocks having been penetrated by nearly 40 wells and being exposed in various parts of Pakistan, no serious efforts have yet been made to investigate their reservoir potential. Neoproterozoic rocks are exposed along the outer periphery of the Salt Range and Nagar Parker in Pakistan and in Rajasthan (India). Surface and subsurface data suggest a good correlation between outcrops in Rajasthan and wells in the Punjab Platform. However, the Neoproterozoic of the Punjab Platform seems to be somewhat different from that in Potwar, suggesting the existence of a kind of barrier or palaeo-high, separating the two basins. Proterozoic stromatolite found in a number of Himalayan sequences seems to be correlatable with similar facies encountered in other parts of the world, such as in the Abalog-1 and Yarba-1 wells in the Toudeni Basin in Mauritania and Mali, respectively. Glacial Pokhran boulder beds (representing snowball Earth) in the Hazara Basin, and reportedly in Pokran and Lawan across the border in India, also correlate with similar Neoproterozoic facies found in other parts of the world. Neoproterozoic offers a complete petroleum system. Regional data demand that the Neoproterozoic reservoir potential be re-evaluated, and a proper understanding of basinal configuration may play a vital role in future exploration success in this region.

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