Masirah Oil Ltd. completed its fourth-quarter 2022 drilling campaign in Block 50 offshore Oman with workover of Yumna-3 and drilling of Yumna-4.
Workover of Yumna-3 consisted of replacing the electrical submersible pump (ESP) in the well. Yumna-3 is now producing an average of 4,050 bo/d compared with 3,590 bo/d with the old ESP.
Yumna-4 was drilled as a dual objective well to test the eastern extension of the Aruma reservoirs of Yumna field and an exploration target below and northeast of the field. The well was successful at the Aruma level, where it penetrated 9.6 m of net oil pay, consistent with the pre-drill prognosis. The well was completed for production and has flowed at 4,050 bo/d. The flow rate has yet to stabilize, the company said.
After drilling to the Aruma target and setting a 9 5/8-in. casing, the well was deepened and directionally drilled to the northeast to test a structural closure in the Khufai carbonate formation at about 3,000 m. The well reached a total depth of 3,416 m. Oil shows were encountered in the Khufai, and 16.5 m of core were recovered from the formation.
The core has been sent to a laboratory for analysis. However, the planned formation evaluation program could not be completed due to a stuck wireline tool which could not be recovered from the borehole. Results of the core analysis will likely determine if additional drilling and evaluation of this Khufai prospect is justified.
MOL is operator with 100% interest in Block 50.
