Oil operations are carried out by associations of investors. One of the latter, known as operator, is chosen to carry out activities in the field, on joint financing. Within this framework, SNH works with various leading international companies, including Glencore, EurOil (subsidiary of Bowleven), Noble Energy, Addax Petroleum (subsidiary of Sinopec), New Age, Tower Resources, Lukoil Overseas (subsidiary of Lukoil Oil Company), RSM Production Corporation (subsidiary of Grynberg Petroleum Company), Yan Chang, Perenco and Gaz du Cameroun (subsidiary of Victoria Oil & Gas).
SNH markets the share of national crude oil production accruing to the State on the international market and to the National Refining Company. SNH's main international customers include Glencore International AG, Cepsa Trading, Adria Trade AG, Perenco, Shell International Trading and Shipping, Repsol Trading, Unipec and Saras S.P.A.