Project Profile
Location: Kra Central sub-basin, Gulf of Thailand, Thailand
Prospective recoverable resources: 20 - 150 mmbo (>60 prospects)
Area: 5,800 sq km
Start-up Year: -
Block G4/50 contains five sub-basins, four of which have a proven oil source. G4/50-4 was the first well in the drilling programme. The Rayong Prospect is located in the north east of the block in the Central Kra sub-basin.
G4/50-4 exploration well, targeting the Rayong Prospect in the Kra Central sub-basin, Gulf of Thailand, has been drilled to a total vertical depth subsea of 1,889 metres. The well encountered a 119 metre section of excellent quality P20 Miocene sandstones, the primary target on depth prognosis. However, following the completion of a logging and sampling programme, these sandstones were found to be water-wet. In the deeper Permian carbonate target the well encountered a 34 metre section of Ratburi limestone, which was not deemed to be of reservoir quality. The well has been plugged and abandoned.
According to a previous Salamander report (acquired by Ophir Energy), the company planned to drill six exploration wells in G4/50 during 2013 with further exploration drilling to follow in 2014.
Ophir Energy did not make any commercial discoveries during the 2015 drilling programme; however, it confirmed a working hydrocarbon system in the previously undrilled basin.
Operators:
Ophir Energy (Ophir bought Salamander in 2015): Operator with 60% interest
SONA Petroleum: 40% interest
Contractors:
Atwood Oceanics: Drilling services contract using the Atwood Mako rig