Italy's biggest oil and gas group, Eni, has made a new hydrocarbon discovery offshore Indonesia as it aims to boost activity in the region, Eni said in a statement on Monday.

The Jangkrik discovery, drilled in 400 metre water depth, represents a significant success in Eni's exploration efforts in the Kutei Basin and further confirms the high potential of its portfolio in the area, said Eni, the operator of the Jangkrik structure located east of Kalimantan.

Eni said it planned to proceed with the appraisal of Jangkrik discovery and to assess the technical and commercial viability of a fast-track development of the new field.

Eni said it also participates in the development of the significant gas reserves located in the Rapak & Ganal blocks in the Kutei Basin.

In the nearby Tarakan Basin, Eni has in recent years made two other important hydrocarbon discoveries, Aster and Tulip, both of which are now in an advanced appraisal phase, it said.

Eni holds overall working interests in 11 permits in Indonesia and operates six of them. The offshore activities are located in the deep waters of the Tarakan and Kutei Basins and north of Sumatra Island.

Other activities are in the Mahakam River Delta, East Kalimantan, where Eni has an equity production of about 20,000 barrels of oil equivalent per day. (Writing by Svetlana Kovalyova, editing by Anthony Barker)