Sui Main Limestone: Regional geology and the analysis of original pressures of a closed-system reservoir in central Pakistan

摘要

The lower Eocene (Ypresian) Sui Main Limestone (Sui Main) is the most prolific gas reservoir in Pakistan south of latitude 29°N. It does not outcrop anywhere in Pakistan. In the Kirthar Range, southern Pakistan, and Punjab platform, the Sui Main's chronostratigraphic equivalent is the Laki Formation, which is a nonreservoir facies. To date, only gas has been encountered in Sui Main, which has recoverable reserves of more than 20 tcf in the 14 discovered fields.