Offshore oil and gas services are not identified as a sector in the French classification of economic activities (NAF). They include a range of high value added segments among engineering services but also maritime works and manufacturing activities, some of which are included in other maritime activities analysed in the present report, e.g. maritime works (for offshore oil rig construction), LNG carrier building and cable and pipe making and laying. Turnover is analysed using a rough breakdown per main activity segment as proposed by the industry association. Value added and employment are estimated using INSEE data on larger business sectors. Exploration and production investment and fuel prices data are sourced from the oil and gas extraction industry and IMF, and supplement the description as key drivers of the activity.