Houston’s Wison Offshore and Marine presented two concepts to the Pandora LNG joint venture partners for development of the Pandora gas field offshore Papua New Guinea, Cott Oil and Gas (40% interest) announced on 2 June 2014.
Wison was asked to deliver a floating liquefied natural gas (FLNG) concept study on 12 March for the field, located about 200km west of Port Moresby, which is also home to PNG LNG, in the Gulf of Papua and estimated to have a 2C contingent resource of around 792Bcf of gas (or 132MMboe).
The Pandora field is currently divided into two structures, A and B. Pandora A is a 290m-high Miocene-aged reef build-up proven at 57MMscuf/d. The top of the gas column was encountered at 1392m total vertical depth. The Pandora B structure is a 110m gas column tested at 43MMscf/d.
Based on a lean gas composition, Wison said it proposed two options, one offshore and one near shore. The offshore 1mtpa, 170,000cu. m-storage capacity FLNG vessel with an onboard processing, liquefaction, storage and offloading would cost between US$1.15-1.35 billion. Gas would be drawn from a three-well subsea development focusing on the Pandora A structure.
The second scenario was comprised of a near shore LNG vessel of identical storage capacity and 2.5mtpa of liquefaction capacity that would require offshore production facilities and pipeline. The Horton Wison-designed buoyant tower was suggested as possibility for Pandora's gas processing platform. The tower is currently in use offshore Peru at the CX-15 project. The near shore option was estimated to cost between $1.3–1.6 billion.
Wison also noted that first gas “could be delivered within 34 month of award of an EPCIC contract.” Sales would be shipped to north Asia.
Cott Oil and Gas said that its next steps would to discuss the concept study with its PRL 38 joint venture partners and the Papua New Guinea Department of Petroleum and Energy. Talisman Energy operates the Pandora gas discovery with 25% interest. Other JV partners include Kina Petroleum (25%) and Santos (10%).
Map from Cott Oil and Gas