The B-80 oil and gas field is being developed in the Mumbai offshore basin, off the west coast of India, in the Arabian Sea.

The filed is jointly owned by operator Hindustan Oil Exploration Company (HOEC, 50%) and Adbhoot Estates (AEPL, 50%).

It is anticipated to produce 5,000 barrels of oil per day (bopd) and 15 million metric standard cubic feet per day (Mmscfd) of natural gas. First oil from the field is expected in June 2020.

Estimated to cost approximately $43m, the offshore upstream development is expected to generate up to 100 direct and 75 indirect jobs during drilling, as well as up to 25 direct and 50 indirect jobs during the production phase.

B-80 oil and gas field location and reserves

The B-80 oil and gas field is located on block MB/OSDSF/B-80/2016 of the Mumbai offshore basin, approximately 110km away from the Mumbai coast. Situated south of the Mukta field, the B-80 field spans 56km² in water depths ranging from 80m to 100m.

The field is estimated to hold 40 million barrels of oil and 44.5 billion cubic feet (bcf) of gas in-place.

Discovery and background details

B-80 oil and gas field was discovered by four exploration wells drilled by Oil and Natural Gas Corporation (ONGC) in 1987. The discovery wells B-80-1 and B-80-2 were tested at flow rates up to 6,500bopd of oil and 6.4Mmscfd of gas in the Pana 200 sandstone reservoir.

The block was awarded to the HOEC-AEPL joint venture under the Discovered Small Field (DSF) Bid Round 2016. The revenue sharing contract for the project was signed in March 2017, while the petroleum mining lease was transferred in May 2017.

HOEC submitted the field development plan to the Directorate General of Hydrocarbon (DGH) of India in November 2017. Additionally, an application for the environmental clearance for drilling was filed a month later.

The Ministry of Environment, Forest, and Climate Change (MoEFCC) of India granted terms of reference for conducting the environmental impact assessment in February 2018. The final project report was released in 2019.

B-80 oil and gas field development details

The B-80 offshore development project involves well completion, re-entry, and offshore hook-up of three existing wells, namely B-80-1, B-80-2 and B-80-4ST, as well as the drilling and offshore hook-up of six new subsea wells in the Panna reservoir sands.

Development is planned to be completed in two phases, with two subsea wells to be drilled in phase one. The wells will be drilled up to a vertical depth of 2,700m and an overall measured depth of 3,000m using a jack-up drilling rig.

The subsea wells will be connected to a mobile offshore production unit (MOPU) that will be capable of processing 10,000bopd of oil and 15Mmscfd of gas.

Oil and gas transportation

Processed oil and gas will be transported through two new subsea pipelines connecting the MOPU to ONGC’s two existing oil and gas pipelines near the field.

Gas produced at the B-80 field will be evacuated through a 1.35km-long and 6in diameter subsea pipeline connecting ONGC’s WO16-BPB line, while the oil will be transported through an 11.5km-long and 8in diameter subsea pipeline tying-in to ONGC’s ICP-Heera line.

Contractors involved in the B-80 project

HOEC carried out integrated subsurface studies, including 3D seismic data interpretation, as well as geological and reservoir modelling for the B-80 oil and gas field.

Expro, an oilfield services company based in the UK, was awarded a seven-year contract in June 2019 for the construction, maintenance and operation of all topside processing equipment, as well as a production handling facility on the MOPU for the offshore field.

Institute of Oil & Gas Production Technology (IOGPT), which is affiliated to ONGC, carried out engineering study for the subsea pipelines of the B-80 oil and gas field.

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