A rare super-giant oilfield

Rumaila is one of the world’s greatest so-called super-giant oilfields – those that contain over a billion barrels of recoverable oil. It is estimated that some 17 billion barrels of recoverable oil are still contained within Rumaila’s reservoirs.

Location and surface area

 

A field spanning 1,600km2

The field is located 50km to the west of the city of Basra, southern Iraq. The Basra region is home to all six of Iraq’s ports, including the deep-water facility at Umm Qasr.

Rumaila encompasses an area of 1,600 square kilometres, extending approximately 80km north to south and 20km west to east, with the main anticline consisting of two domes, South Rumaila and North Rumaila.

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Geology

Mature and vast reservoirs

The stacked sandstone and carbonate mature reservoirs at Rumaila lie at depths of up to four kilometres.

The Main Pay reservoir has produced oil for more than 60 years, but in the north of the field, the Mishrif reservoir has to be managed by peripheral waterflood, to maintain pressure health and support production from a complex carbonate reservoir. Addressing these challenges is key to maintaining Rumaila’s current and long-term production rate.

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