The project’s first well, C24-P4 No. 3, flowed 3.8 MMcfd of sweet gas and 176 b/d of condensate.
ONGC said three more wells will begin producing within a month.
The first phase of the project includes installation of two wellhead platforms, C24-P3 and C24-P4, and a riser platform, C24-RP, and associated marine pipelines.
The full project will include seven wellhead platforms, the riser platform, and 28 wells.
It covers development of C-24 field and monetization of marginal fields designated B-12-11, B-12-13, and B-12-15, 90-100 km offshore Daman.
Gas and condensate flow through processing facilities on Tapti field to Hazira.
ONGC expects the project to produce 953 bcf of gas and 31.5 million bbl of condensate over 20 years.