Invictus Energy Ltd. discovered a working hydrocarbon system in the Mukuyu-1 well in license SG 4571, Cabora Bassa basin, Northern Zimbabwe.
After drilling the 8 ½-in. hole section, the well reached 3,618 m MD where preliminary TD was called. Elevated mud gas peaks (up to 135 times above background gas baseline while drilling through a depth of 3,171 m MD) have been observed with marked increases from C1 to C5 compounds (methane, ethane, propane, butanes, and pentanes).
Multiple additional zones with elevated mud gas and fluorescence were also encountered throughout the intersected Upper Angwa reservoir intervals which also have associated drilling breaks. Increasing background gas with heavier hydrocarbon components have been observed with the increase in depth to TD since the repair of the mud gas chromatograph system from about 2,820 m MD. Logging While Drilling (LWD) resistivity was unavailable prior to recommencement of drilling due to a tool integrity issue and was excluded from the deployed bottom hole assembly.
All zones of interest will be comprehensively evaluated through a planned wireline logging program which allow for identification of any potential hydrocarbon pay across the entire 8 ½-in. hole section to provide detailed geological information to confirm the presence of moveable hydrocarbons. Wireline logging and evaluation is anticipated to take 3-6 days to complete depending on logging conditions.
The company may elect to deepen the Mukuyu-1 well to test the deeper potential of the remaining Upper Angwa and Lower Angwa formations following the completion of wireline logging.
Invictus Energy is operator at Cabora Bassa with 80% interest.