PERTH, Australia – The jackup Valaris 115 has completed a 54-day development drilling/workover campaign for Mubadala Petroleum on the Manora oil field in the Gulf of Thailand.
This comprised four new development wells and the workover of two existing wells. According to partner Tap Oil, the program finished 8.5% under budget and 2.5 days ahead of schedule, with an estimated overall cost of $15.08 million.
Among the line-up, MNA-25 was a deviated development well designed to produce oil from a crestal location in the 600 series reservoirs of the Manora central fault block region. It reached TD at 1,975 m (6,479 ft) MD, with petrophysical analysis indicating around 40 m (131 ft) net oil pay in the target sands, and was completed with an electric submersible pump.
MNA-27, drilled in the eastern fault block (EFB) region, was effectively a twin of the MNA-22 well drilled in 2019 but not put into production due to poor cement bonding behind the production casing. It too was a deviated well, drilled to a TD of 2,405 m (7,890 ft) MD, encountering 45 m (147 ft) of net oil pay.
MNA-28 was designed as an additional drainage point in the thick oil bearing 490 series sand in the EFB. It penetrated at least 35 m (115 ft) net oil pay in the 490 and 500 reservoirs, and was fitted with a single zone completion with ESP in the 490 sands.
Workovers included conversion of the MNA-07 well in the EFB to a water disposal well to help optimize the field’s production and ultimate oil recovery.