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Cairn Energy has completed the operations of SNE-5 appraisal well in offshore Senegal.

The company completed all operations, including drilling, logging, drill stem testing and the setting of pressure gauges before schedule and within the budget.

Currently, the SNE-5 well has been plugged and abandoned.

Initial analysis of the dataset collected in this campaign is in line with the company’s expectations. SNE-5 well targeted a location in the Upper Reservoirs where two principal units are situated within the oil leg.

The figures of main reservoir units, pressure data and fluid contacts match previous SNE wells as expected. Several samples of oil and gas were recovered during wireline logging and drill stem tests and analysis indicates oil of similar quality to previous wells.

Cairn Energy conducted two drill stem tests within the Upper Reservoir units at gross intervals of 18m and 8.5m, which also produced results as expected.

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DST 1a flowed with oil from an 18m interval at a maximum rate of around 4,500bpd on a 60in/64in choke. 

"The target has a potential gross mean consolidated prospective resource of more than 100 million barrels of oil."

In DST 1b, an additional 8.5m zone was added. The well flowed at a maximum rate of 4,200bpd and for 24 hours at an average rate of around 3,900bpd through a 64in/64in choke.

The vessel that conducted SNE-5 drilling, Stena DrillMAX has been sent to Vega-Regulus (VR-1) well located around 5km west of the SNE-1 discovery. 

VR-1 well will target the Vega-Regulus exploration prospect in the Aptian Carbonates underlying the SNE field.

The target has a potential gross mean consolidated prospective resource of more than 100 million barrels of oil.

Image: Cairn Energy worker in Senegal. Photo: courtesy of Cairn Energy.