Mubadala, partners start Manora drilling, workover campaign

Mubadala Petroleum (Thailand) Ltd. will drill, complete, and produce three wells in Manora oil field, 80 km offshore Prachuap Khiri Khan Province, Thailand, said partner Tap Oil in a statement. Drilling is scheduled to start around May 15 using the Valaris 115 jack-up drilling rig. The program includes wells MNA-25, MNS-26, and MNA-27.

The primary objective for MNA-25 is oil in the 600 series reservoirs of the Manora Central fault block. The well will be deviated and drilled close to the existing MNA-01 well, targeting 610, 620, and 650 sands in an updip location. MNA-01 is still producing at 680 b/d gross with 84% water cut from the 650 sand. The well will be drilled to 2,400 m maximum measured depth with a multi-zone completion. Gross estimated drilling and completion cost is $4.12 million ($1.24 million net to Tap).

MNA-26 primary objective is potentially undrained oil in the 370-10 reservoir first developed by the MNA-24 horizontal well in 2019, also in the Manora Eastern Fault Block. The targeted sand lobe is interpreted separate from the productive sand in MNA-24, which still produces about 900 b/d with 18% water cut.

The well will be drilled to 2,225 m maximum measured depth and include about 400 m of horizontal section in the upper 370-10 reservoir completed with a sand screen. Estimated initial production is 1,100 b/d. Gross estimated drilling and completion cost is $3.64 million ($1.09 million net to Tap).

MNA-27 will be drilled from a new platform slot and effectively twins MNA-22 drilled in 2019 that was unable to be put into production due to poor cement bond behind production casing. Petrophysical interpretation of MNA-22 logs show 56.5 m total oil net pay in the 490 and 500 series sands.

The deviated well will target these well-developed sands and provide an additional reservoir drainage point in the highly productive Eastern Fault Block of Manora oil field. The well will be drilled to a 2,011 m maximum measured depth with a multi-zone completion. Estimated initial production is 1,400 b/d. Gross estimated drilled and completed cost is $3.61 million ($1.08 million net to Tap).

While the rig is on location, the JV parties have decided to workover two wells.

MN-15 will replace an electric submersible pump (ESP). The original failed in February 2019. Expected initial production is 300 b/d. Gross estimated workover cost is $0.9 million ($0.27 million net to Tap).

MNA-7 will be re-completed as a water disposal well in shallow reservoirs and will provide additional water disposal capacity to help optimize Manora production and ultimate oil recovery. Gross estimated workover cost is $1.2 million ($0.36 million net to Tap).

Mubadala Petroleum is operator of the field with 60% interest. Tap Energy holds 30% interest while Northern Gulf Petroleum holds the remaining 10%.