InterOil suspends work on Wahoo-1 well in Papua New Guinea

InterOil Corp., Houston, has suspended drilling of its Wahoo-1 well in PPL 474 in Papua New Guinea after intersecting gas and higher-than-expected pressures that could compromise rig safety.

The company says significant concentrations of methane, ethane, propane, and butane have been recorded and are believed to be entering the wellbore from permeable zones above the predicted reservoir zone, which is yet to be penetrated.

The gas is characteristic of thermogenic hydrocarbons, indicative of an active hydrocarbon-generating source rock.

The Wahoo-1 well was designed for high pressures based on data from other wells in the region. However, pressures have exceeded that of the Antelope discovery, 170 km northwest, by about 50%.

After a review by drilling and engineering teams and expert advisers, InterOil has concluded that drilling ahead would pose an unacceptable safety risk to people and the rig, and the company has received approval from the PNG Department of Petroleum and Energy to suspend the well.

The company says operations will resume as soon it becomes feasible. The company will conduct a detailed review of well engineering, equipment, and options, and then allow a regulator to approve the company’s plans.

An option includes testing of the gas-bearing permeable zones encountered in the Orubadi mudstone.

Progress on Wahoo-1 has confirmed an effective seal in the Orubadi mudstone as well as the presence of thermogenic hydrocarbons.

InterOil says drilling is required to confirm the presence of a reservoir below the well’s current total depth before Wahoo can be considered a discovery.

Related Articles

DPE makes deep gas discovery offshore Dubai

10/14/2014 Dubai Petroleum Establishment (DPE) reported that its T-02 deep gas exploration well has identified largely natural gas with no hydrogen sulfide co...

BLM Rock Springs office seeks comments on proposed gas project

10/14/2014 The US Bureau of Land Management’s Rock Springs field office is seeking public comments on a proposal to develop up to 17 natural gas wells on as m...

Woodside farms into offshore Cameroon block

10/14/2014 Woodside Petroleum Ltd., Perth, has farmed into the Tilapia production-sharing contract offshore Cameroon under an agreement with Glencore and Nobl...

Statoil makes another gas discovery off Tanzania


Statoil ASA reported its seventh discovery on Block 2 offshore Tanzania, with the Giligiliani-1 finding 1.2 tcf of gas in place.

Careers at TOTAL

Careers at TOTAL - Videos

More than 600 job openings are now online, watch videos and learn more!


Click Here to Watch

Other Oil & Gas Industry Jobs

Search More Job Listings >>
Stay Connected