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Praising good work on Oseberg

“Decision-makers on producing fields should have had exploration experience,” said Director General Bente Nyland during the breakfast organised by the Norwegian Petroleum Directorate (NPD) at ONS the day after awarding the IOR prize to Statoil’s subsurface environment on the Oseberg field.

Celebrating the 2012 IOR award

Celebrating the 2012 IOR award.
From left: NPD jury members Leif Hinderaker and Sølvi Amundrud, Statoil’s head of petroleum technology for Oseberg, Carl-Frederik Eek-Jensen and VP Oseberg Field Karl Henrik Dalland. (Photo: Monica Larsen)

 

Nyland praised the thorough expert work on Oseberg. Gas injection alone has provided more than 60 million standard cubic metres, or about 400 million barrels, of additional oil from the field. All measures to extend and increase production have resulted in a recovery rate of 64 per cent. This figure is expected to rise in coming years.

“This recognition goes to the heart of every reservoir engineer and geologist,” said Carl-Frederik Eek-Jensen, head of petroleum technology on Oseberg.

“It is based on, and made possible by, an enthusiastic and competent organization and a constructive partnership in the licence, and the NPD’s clear and distinct role in the history of this field.”

Even though gas injection was not included in the original development plans, Oseberg utilised this method from the very beginning in 1988. In the period from 1991 to 2002, the field imported a total of 21.7 billion (giga) standard cubic metres of gas from Troll Øst for this purpose.

The Oseberg field was quick to utilise new methods early on, such as drilling horizontal wells and multilateral wells, and has tied in several minor discoveries near the main reservoir.

The subsurface environment on Oseberg consists of 70 people distributed over five different departments, according to Eek-Jensen. The field currently consists of four permanent facilities, and a large number of templates. The drilling equipment is constantly upgraded, new wells are drilled, and the reservoirs are monitored using 4D seismic.

“Between 2007 and 2011, we have been able to mature the same volume from the main reservoir as has been produced. This is a major contribution by a 20-year-old field”, he said.

With all planned measures, he hopes the field can increase the recovery rate to 70 per cent by 2035.

This year is the first time the IOR prize was awarded at ONS. It will now be awarded every two years, when the oil exhibition takes place in Stavanger.

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