Oil and gas exploration company Cairn Energy has completed drilling operations ahead of schedule at the SNE-6 appraisal well, which is located off the shore of Senegal.

The company’s target was to flow oil from one of the main units in the upper (400 series) reservoirs and assess the connectivity between the SNE-6 well and the previous successful SNE-5 well.

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Pressure data from SNE-6 confirmed strong connectivity with SNE-5, which led Cairn to conduct drill stem testing (DST).

Subsequent analysis of the procured dataset found that the main reservoir units, pressure data and fluid contacts were in line with the previous SNE appraisal wells. Multiple samples of oil were recovered and exhibited similar quality during DST.

Pressure data from SNE-6 has confirmed that the upper reservoir is connected with SNE-5, which is located roughly 1.6km away.

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Cairn is currently working to integrate this new data to determine the extent of water flood secondary recovery, which can be applied to these upper reservoirs.

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"The results from this latest well provide essential data as we move towards submitting a development plan for the SNE field to the Government of Senegal in 2018."

The company noted that further evaluation is necessary to identify the impact on modelled reservoir architecture, recoverable resource base and forward development plan, which will commence after the collection of interference test data from the observation wells.

Cairn Energy CEO Simon Thomson said: “This is our ninth successful well in Senegal in three years.

“The results from this latest well together with SNE-5 and VR-1 provide essential data as we move towards submitting a development plan for the SNE field to the Government of Senegal in 2018.

“Operations now move to Fan South as we continue to test significant further prospectivity in the extensive acreage position.”

SNE-6 has been plugged and abandoned following completion, and the Stena DrillMAX drill ship has been mobilised to Fan South exploration well to commence operations.

The well is situated nearly 20km south-west of the SNE-3 well at water depths of approximately 2,175m.