As a result, the decision has been made to call total depth for the current 8½ in. section (N structure) to preserve the oil already found in this section.
The interval just drilled commenced at approximately 3077 mMD (2970 mTVD), indicating a potential gross reservoir interval of possibly as much as 500 mMD (450 mTVD). The gas behaviour in this interval was better than anticipated and there have been significant oil shows present throughout on the shale shakers and in cuttings samples. Drilling of this section commenced with a mud weight of 1.54sg and had to increase up to 1.73sg to maintain well control.
Preparations are now underway to log the section just drilled, which should give a better understanding of the hydrocarbons that have been encountered.
Following the completion of logging of this section the 7 in. liner will be set before drilling ahead into the deeper zone with a 6 in. hole to test the Alameda structure - the second and largest primary target for this exploration well.
Melbana Energy’s Executive Chairman, Andrew Purcell, commented: “This well is not affording much chance for rest for our hard working team here on the ground in Cuba, but no one is complaining given what this well continues to tell us. We’re all looking forward to the results of the forthcoming logging program to learn more about this extensive oil interval we’ve intersected.”
Read the latest issue of Oilfield Technology in full for free: Issue 4 2021
The issue starts with a report from Rystad Energy focusing on the outlook for the upstream industry in the Middle East. The rest of the issue is dedicated to features covering production optimisation, drill bits, pipeline integrity, health and safety, and more.
Exclusive contributions come from Varel Energy Solutions, Rystad Energy, Gyrodata, 3X Engineering, Tracerco, Ulterra Drilling Technologies and more.
Read the article online at: https://www.oilfieldtechnology.com/exploration/07022022/significant-oil-interval-found-at-onshore-cuban-well/
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