Project Profile
Location: Arabian Sea, 80 km northwest of Mumbai in Maharashtra, west coast of India
Gas compressors capacity: 5 million cubic metres per day each (two compressors)
Wet gas separator capacity: 5 million cubic metres per day of gas and 6,000 bpd of liquids
Gas reserves: 393 billion cubic meters (IGIP)
Water depth: 70 metres
Start-up Year: -
Discovered in 1976, ONGC started the production of natural gas only in 1987 because of the high sulfide content of the field. The Bassein Platform A (BPA) and Bassein Platform B (BPB) were the first gas processing platforms to enter commercial operations in 1987 and 1988 respectively. Then after pre-treatment offshore, the gas is exported to the Hazira gas processing plant. Designed to last 25 years, the high content of sulfides and the new regulations edited by the Indian Oil Industry Safety Directorate (OISD) require the existing platforms and infrastructures to be revamped in parallel to the Bassein project expansion.
All together with the revamping/upgrading of the existing facilities and with the construction of additional production infrastructures, ONGC is planning to spend more than US$6 billion capital expenditure in order to maintain production until 2030. Planning this revamping/upgrading and expansion of the Bassein gas field in several phases, ONGC had planned for this first expansion with approximately $500 million capital expenditure covering a:
- New central processing platform (BCPA-3) to be bridged to the existing platform BCPA-
- New living quarters platform (BLQ-3) to host 50 to 100 persons
- New wellhead platform equipped with nine slots for exploration or production
- Modifications on the existing central processing platform BPA
The new central processing platform BCPA-3 should run:
- Two raw natural gas separators plus space for further expansion with a third unit
- Two gas compressors with a capacity of 5 million cubic metre per day each
The wet gas separators will have a production capacity per unit of:
- 5 million cubic meter per day (cbm) of gas
- 6,000 barrels per day (b/d) of liquids
Operator:
Oil & Natural Gas Corporation (ONGC): Operator with 100% interest
Contractor:
GOL Offshore: Reconstruct a pair of gas processing platforms
L&T Hydrocarbon Engineering Limited (LTHE) (a wholly owned subsidiary of Larsen & Toubro): Contract worth 2715 crores (US$426M) encompassing total Engineering, Procurement, Construction and Installation (EPCI) for the project with the scope including one new process platform with gas processing and compression facilities, one nine-slot wellhead platform, topside modification on existing platforms, associated subsea pipelines and one living quarter platform in the Bassein Field.