Senegal

Cairn has been active in Senegal since 2013. In 2014 Cairn made two significant discoveries in Senegal, one of which was potentially the largest global oil discovery in 2014.

7

Successful wells drilled offshore Senegal

2

Basin opening oil discoveries

Map of Senegal assets

Summary of interest

Rufisque Offshore

Cairn 40% (operator), Woodside Energy 35%, FAR Limited 15%, Petrosen 10%

Sangomar Deep Offshore

Cairn 40% (operator), Woodside Energy 35%, FAR Limited 15%, Petrosen 10%

Sangomar Offshore

Cairn 40% (operator), Woodside Energy 35%, FAR Limited 15%, Petrosen 10%

Overview

Cairn has been active in Senegal since 2013 and drilled two wells in 2014, discovering oil in both and opening a new hydrocarbon basin on the Atlantic Margin, with the SNE-1 discovery recognised as the largest global oil discovery in 2014.

These were the first wells to be drilled offshore Senegal in more than 20 years and the first deep-water wells. The success of the programme and the discoveries have attracted the attention of the global oil industry.

Since the two initial basin opening discoveries in 2014, Cairn has drilled five successful wells in the area. In 2017, the third phase of evaluation is underway which is intended to improve the definition of the project. The prospectivity of Cairn’s Senegal acreage, an area of more than 7,000 km2 under licence, has high potential; the success of both the SNE discovery and follow on appraisal of the SNE field has proven there is a prolific source rock, excellent reservoir development and a good working seal.

Cairn has a 40% WI as Operator in three blocks offshore Senegal (Sangomar Deep, Sangomar Offshore and Rufisque); Woodside Energy has 35% WI, FAR Limited 15% WI and Petrosen, the national oil company of Senegal, 10% WI. The three blocks cover 7,490km2.