Dongfang 1 1 is a large gas field located in the Yinggehai Basin. Dongfang 1 1 gas is high in carbon dioxide and nitrogen. Dongfang 1 1 was developed in two phases. Phase I came onstream in October 2003 followed by Phase II in 2006. CNOOC is working to bring onstream an adjustment project which involves one new platform and additional development wells to the Phase I development.