Geoservices S.A., an oilfield services company, provides mud logging, well intervention, and field surveillance. Its mud logging services include drilling support services, such as depth, drilling speed, vibrations, and early kick detection, as well as formation evaluation services, including analysis of rock cuttings and gas in the mud. The company's Well Intervention services comprise light or heavy mechanical wireline operations; reservoir monitoring and downhole data acquisition; and replacement of faulty equipment, scraping, and perforation. Its field surveillance services include providing ad-hoc staff and procedures for the operation and maintenance of surface installations; equipment sales; and services solutions, such as solutions for the determination of well production rates for reservoir monitoring and well performance. The company was founded in 1958 and is headquartered in Le Blanc Mesnil, France. Geoservices has operations in the South East Asia/Pacific, North East Asia, the Mediterranean, Indonesia, Latin America, the Middle East, North Europe, North America, West Africa, and Singapore.