The present activity of PGNiG in Pakistan is focused on the Kirthar concession which is situated in the Sindh Province, about 50 km to west to Dadu Town. The Block no 2667-7 Kirthar EL was awarded to PGNiG in May 2005. All the operations on Kirthar Block are performed through the Joint Venture with Pakistan Petroleum Limited (PPL) with 70% shares owned by PGNiG and 30% by PPL.
The Kirthar Block is geologically situated in the Kirthar Thrust and Fold Belt of southwestern Pakistan, approximately 30 kilometers northwest of the Bhit gas field and 40 kilometers west of the Zamzama gas field. The structuring of the Kirthar Fold Belt formed during Miocene to recent resulting in a series of anticlinal features bounded by longitudinal and transverse high angle reverse faults.
The Joint Venture discovered gas at Rehman-1 during 2009 which is currently producing 10 MM MMSCFD gas. The Rehman structure is a NW-SE trending, fault bounded anticline feature. Natural gas was discovered and tested from the Pab Formation. The structure is currently delineated by three wells, Hallel-1 (2003), Rehman-1 well (2009), and the most recent re-entry sidetrack Hallel X-1 drilled in 2011. The Pab reservoir in the area is declared a tight gas formation (Government of Pakistan, Ministry of Petroleum and Natural Resources, Tight Gas Policy).
The primary reservoir for the Rehman discovery is the late Cretaceous age Pab Formation. This sandstone is also the primary reservoir in the Bhit, Zamzama and Mehar Gas fields in the region. The Sembar Formation of early to middle Cretaceous age is considered the main source rock in the surrounding region, while the overlying Ranikot Formation shales provide the regional seal for the Pab reservoir. The Pab structure over the evaluated area is characterized by a four-way dip closure bounded by sealing faults.
A new gas discovery on the Kirthar concession has been made as a result of drilling and testing of Rizq-1 Exploratory Well. During initial testing Rizq-1 well could not produce commercial volume of gas, however after frac job well delivered up to 10.7 MMSCFD Gas from Pab formation of Cretaceous age.
PGNiG has been active in Pakistan since 1997 and Kirthar JV has so far invested approximately US$ 108 million in Pakistan which includes Rehman-1 and Rizq-1 exploratory wells and seismic acquisition in Kirthar Concession. The present success in Kirthar block would trigger more investment in petroleum exploration and development in Pakistan.