Pakistan Petroleum Limited (PPL) announced a gas and condensate discovery from its exploratory well Dolphin X-1 in the Sirani Block, Sujawal district, Sindh.
The find marks the first-ever hydrocarbon discovery from the Jurassic-age Chiltan Formation in the Lower Indus Basin, opening a new exploration play in the region.
What did PPL discover at the Dolphin X-1 well?
PPL's discovery establishes a working petroleum system in the Sirani Block and could expand exploration prospects across the onshore marshy terrain, including potential extensions into shallow offshore areas. The find represents the first hydrocarbon discovery from the Chiltan Formation in the Lower Indus Basin, opening a previously unexplored frontier.
Why was this area difficult to explore?
The area had long been considered challenging for exploration because of its difficult geography and marshy terrain. PPL said it became the first exploration and production company to overcome these challenges, deploying specialised transition equipment to acquire 2D and 3D seismic data. This allowed the company to evaluate the previously unexplored frontier for the first time.
How was the Dolphin X-1 well drilled and tested?
Dolphin X-1 was spudded on April 17, 2026, and drilled to a measured depth of 3,850 metres to assess the hydrocarbon potential of the Chiltan Formation. Drilling results and wireline log data identified a hydrocarbon-bearing zone. During testing, the Chiltan Formation flowed gas with a heating value of about 1,000 Btu/scf at a rate of 0.942 million standard cubic feet per day, at a wellhead flowing pressure of 211 psig through a 32/64-inch choke.
Who operates the Sirani Block?
PPL operates the Sirani Block with a 75% working interest, while Government Holdings Private Limited holds the remaining 25%. The well was drilled and tested using indigenous expertise, resulting in the identification of a new hydrocarbon play within the Chiltan Limestone. PPL also acknowledged the Pakistan Navy for its support throughout the project, which it said contributed to the successful outcome.
What are the next steps for this discovery?
Preliminary geological, geophysical and engineering data indicate that the reservoir may be tight. PPL said this assessment will require further confirmation through detailed evaluation of the geological and geophysical data, along with reservoir-engineering information gathered during drilling and testing.
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