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Friday, November 1, 2013
Lekoil provided an update on its Ogo-1 discovery well on Nigeria’s OPL 310. Following the discovery of a significant light oil accumulation, 216 ft of net stacked pay, Lekoil and partners, Afren and Optimum Petroleum Development, commenced drilling on the planned Ogo sidetrack (Ogo-1 ST). The sidetrack was drilled to test both the down-dip extension of the four-way dip close structure at the Ogo discovery and a new play of stratigraphically trapped syn-rift sediments that pinch-out onto the basement high.
The Ogo-1 ST reached a total measured depth of 17,987 ft on October 6. Based on logging-while-drilling (LWD) and mudlogging data, the well encountered hydrocarbon intervals in the same Turonian, Cenomanian, and Albian reservoirs that were successfully drilled and logged at the Ogo-1 well. All of the reservoir intervals came in high to prognosis, potentially indicating a larger structure than estimated post drilling of the Ogo-1. The LWD and mudlogging data also indicate that the syn-rift section encountered a 280 ft true vertical thickness gross hydrocarbon interval.
While circulating bottoms up at TD, prior to the acquisition of wireline logs, the drill string parted at 3,390 ft. The partners are in the process of recovering the drill string from the well bore.
Based on the positive results of drilling, it is believed that wireline data and testing of the sidetrack is necessary in order to define the extent of the hydrocarbon intervals. The partners are continuing with the evaluation of the existing logging data from the Ogo-1 well. Further updates will be provided in due course.
Commenting on the OPL 310 drilling results to date, Lekan Akinyanmi, Lekoil’s CEO said, “I am delighted that the geological and technical work we put in to this well and associated sidetrack have been validated with what appears to be a second significant discovery. It also substantiates our prior and extensive work on the Dahomey basin. We look forward to logging and testing the sidetrack before formulating an appraisal strategy.”
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