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Gazprom Neft finds new hydrocarbon field in Okhotsk Sea

EBR Staff Writer Published 05 October 2017

Gazprom Neft subsidiary Gazpromneft-Sakhalin has discovered new hydrocarbon field at Ayashsky licence block in Okhotsk Sea.

The company has completed drilling of an appraisal well, which is expected to include initial reserves of around 255 million tonnes of oil equivalent (mtoe). It is situated on the continental shelf of the Okhotsk Sea.

Based on the 3D seismic data, the company has drilled at the Ayashsky prospective formation and plans to prepare complete assessment on the reserves by mid-2018.

Gazpromneft has used advanced technologies to construct the well and carried out drilling by using a rotary steerable system to maintain vertical control with automatic corrections.

The firm has taken core samples running to 162m from anticipated productive strata (horizons) to build the 2,700m deep well. It has also undertaken broad open and closed geophysical and hydrodynamic borehole exploration works for the well.

Part of the Sakhalin-3 project, the Ayashsky block is situated in the north eastern part of Sakhalin Island’s continental shelf.

The 3D seismic works at an area of around 2,150m² have been completed in the Ayashsky block

Gazprom Neft CEO Alexander Dyukov said: “The development of Gazprom Neft’s offshore assets remains a strategic priority for the company.

“We continue the development and exploration of all offshore licence blocks in our portfolio. The discovery of a major field in the Okhotsk Sea proves the relevance of our experience and allows us to reassess prospects for developing offshore projects.”

Gazpromneft-Sakhalin is the operator of the Dolginskoye oil field, as well as the North-West block of the Pechora Sea and Kheisovsky block in the Barents Sea.

Image: Gazpromneft-Sakhalin has discovered new offshore field at Ayashsky licence block. Photo: courtesy of Gazprom Neft PJSC.