Gazprom Neft has become the first oil company in Russia to use the domestically produced standalone “CRAB” seabed station for seismic surveys — Russian oil and gas companies having previously had to largely rely on international equipment in operations of this kind. This technological solution is currently being used to conduct 3D seismic operations at the Ayashsky license block in the Sea of Okhotsk.
Gazpromneft-Sakhalin will be using this technology to complete 400 km2 3D seismic operations at its Neptune field, to be followed by approximately 300 km2 at the Triton field.
Denis Manturov, Minister for Industry and Trade of the Russian Federation, commented: “The CRAB project has already undergone a range of tests at Gazprom Neft facilities, with about 3,000 seabed stations having been produced so far. The 2019 polar season has seen JSC Marine Arctic Geological Expedition’s resources being used to help Gapzrom Neft undertake common depth point (CDP) seismic works using CRAB equipment.”Denis Manturov Minister for Industry and Trade of the Russian Federation
Andrey Patrushev Deputy CEO, Offshore Project Development, Gazprom Neft, commented: “Technological leadership, including in implementing cutting-edge domestic technologies, is one of the company’s priorities. This innovative development, being used on Sakhalin, is allowing Gazprom Neft to undertake seismic exploration at the Ayashsky license block to a high standard, and cost effectively — this block being one of the most promising in the company’s offshore portfolio.”Andrey Patrushev Deputy CEO, Offshore Project Development, Gazprom Neft
The “CRAB” seabed stations form part of a joint project between Gazprom Neft, the Ministry of Trade and Industry of the Russian Federation, JSC Marine Arctic Geological Exploration, and the International Tomography Centre (ITC SB RAS). The CRAB seabed station is a mobile hardware and software appliance for marine seismic surveying and monitoring, used in transit zones and offshore. Built from four-component autonomous seabed stations, serviced through the station’s container-laboratories, the CRAB station is designed for local seismic surveys and exploration at offshore hydrocarbon fields.
The Ayashsky license block in the Sea of Okhotsk is located 55 kilometres offshore from Sakhalin Island, in the north—east of the island’s continental shelf, where sea depths can reach up to 90 metres. The Neptune field (with reserves in place of 415 million tonnes (mt) of oil) was discovered in 2017, and the Triton field (with reserves in place of 137 mt) in 2018.
Gazpromneft Sakhalin is a subsidiary of Gazprom Neft. The company is primarily engaged in the exploration and development of offshore oil and gas fields. The company is operator of the Dolginskoye oil field, at which geological prospecting works are currently ongoing, as well as the North-West block of the Pechora Sea, the Kheisovsky block in the Barents Sea, the Severo-Vrangelevsky block, covering the East-Siberian and Chukhchi Seas, and the Ayashsky block in the Sea of Okhotsk.