The Hindu Business Line : ONGC charts plan to hike output at Bombay High

ONGC is planning to step up production at Bombay High to 18 million tonnes through a specially designed re-development plan. The plan, which includes building of more wells, enhanced oil recovery (EOR) and adequate reservoir management programmes, has already pushed up recoveries in South Bombay High from 28 per cent to 31 per cent.

The company has already commenced the re-development project at South Bombay High and will be replicating it in North Bombay High soon.

Informed sources told Business Line that the production at Bombay High had dipped from 20 mt to 12 mt. "Production has started responding to the development plan and is on an upswing once again," sources said.

Apart from Bombay High, ONGC has also launched its re-development plan at Mehsana, Balol and Santhal fields in Gujarat, by using the in-situ combustion method.

The company has already adopted a Rs 1,200-crore programme for implementation of the EOR technology in all fields containing high viscosity oil, commonly known as `heavy oil', so as to oxidise some of it in the reservoir itself to make it lighter, and thereby increase the flow of recovery. The oxidisation is done by generating heat inside the reservoir.

Counted among the few companies globally that uses the in-situ combustion method successfully, ONGC is also considering taking up EOR consultancy projects.

Describing enhancement of recoveries as "equivalent to striking new oil reserves," sources said that the company is planning to increase recoveries in the West coast fields by 3-5 per cent.

Incidentally every percentage increase in recovery will generate an additional revenue of Rs 3,000 crore for the company.

Globally, Norway has recorded the highest recovery rate of 55 per cent. Though ONGC had recorded 60 per cent recovery in a well in Cambay, the average recovery rate was in the range of 25 to 28 per cent.

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