June 29, 2012. Essar Projects Ltd said it has completed work on Oil and Natural Gas Corp's (ONGC) ' 1,064 crore project to develop D1 fields, 200-km off the Mumbai coast. The project will help ONGC scale up D1 field production to 35,000 barrels per day, Essar said but did not give the current output. The scope of the work included engineering, procurement, construction, installation and commissioning of the three unmanned four- legged fixed jacket platforms in water depths of about 90 metres. D1B platform will receive the 35,000 bpd of crude oil produced by the D1, D1C and D1D platforms and will then be transferred for processing to the D1 field FPSO.