Petroleum Africa
Find us on: 
Thursday, November 24, 2022
Since the last update by Invictus Energy, the Mukuyu-1 well was successfully deepened to 3,923 meters measured depth (MD) where total depth (TD) was called. The well encountered additional reservoir zones displaying elevated gas shows and fluorescence to TD.
This proves up the potential over an approx. 900-meter gross interval within the Upper Angwa, which is thicker than pre-drill estimates.
Following TD, the borehole was prepared for wireline logging, however the logging tools were unable to pass beyond a depth of 3,030 meters MD following several attempts. In addition, substantial amounts of overpull were required to free the tool from several points along the wellbore which is typically indicative of wellbore instability/breakdown.
Analysis shows borehole conditions have deteriorated over the last few days while waiting for the wireline formation testing tool to arrive. Further attempts to log the existing hole section is deemed to carry elevated risk of losing wireline tools and not fulfilling the objectives of the evaluation program to obtain a fluid sample.
Deterioration is likely due to heavy water-based mud utilized as a precaution during drilling, previous remedial action taken to stem the losses experienced in the Pebbly Arkose formation and the substantial length of time the current 8½” hole section has been open, which now exceeds 25 days.
Invictus Managing Director Scott Macmillan commented: “The existing Mukuyu-1 wellbore was successfully deepened to 3,923 MD and continued to encounter multiple reservoir units with elevated gas shows and fluorescence until total depth (TD), proving up the potential of the Upper Angwa formation over a 900-meter gross interval.
“Our primary Upper Angwa target formation is thicker than anticipated from pre-drill estimates, which bodes well for future prospectivity in the basin. After reaching TD, the borehole was prepared to run wireline logs, however, due to a deterioration in borehole conditions, the tools were unable to pass below a depth of approximately 3,030mMD where the primary fluid sampling targets are located.
“Current borehole conditions make logging the existing hole section extremely risky with an increased likelihood of losing tools and not meeting the objectives of the well. As a result, the decision has been made to sidetrack the Mukuyu-1 well in order to complete our evaluation and obtain a fluid sample.
“Results to date have been extremely encouraging and we plan to suspend the sidetrack well for future testing. We anticipate the remaining activities will require a further 12 to 18 days and we look forward to providing further updates in coming weeks.”
" alt="First LNG Realized at the Greater Tortue Ahmeyim Project">
" alt="United Energy Acquires Western Desert Producer APEX">
" alt="Baker Hughes Announces Major Gas Technology Orders for Venture Global LNG">
" alt="ReconAfrica: Naingopo Results Demonstrate a Working Petroleum System">
" alt="Tullow Highlights 2025 Operational Plans in Ghana">
" alt="TotalEnergies to Supply 1.5 TWh to STMicroelectronics in France Over 15 years">
" alt="Rockhopper Reaches Final Settlement with United on Egypt’s Abu Sennan Concession">
" alt="Oil & Gas Crucial for African Growth: AEC Calls for Industry Support to Defend African Market">
