Sources said the tender was floated last month, and the workscope envisages engineering, procurement, construction and installation of five new platforms, N-19, N-21, N-22, N-23 and N-24.

The work also includes the clamp-on and associated modifications at the N-11 wellhead platform.

Indian contractors, such as Larsen & Toubro, Essar, Afcons,Sew Infrastructure, Great offshore, and some smaller players, are likely to show interest in the project, said a source.