Results of Offshore Exploration in Russia

In 2017, in line with its license commitments, Rosneft continued exploration and prospecting for oil and gas in offshore areas in the Russian Arctic, Far East and southern seas.

2D Seismic Surveys

During the 2017 field season, Rosneft carried out 2D seismic surveys on an unprecedented scale ahead of the schedules stipulated by its license obligations. Across a total of 11 license areas, 46,348 linear km of 2D seismic surveys were completed, including 36,598 linear km on 10 licenses on the Arctic shelf and 9,750 linear km in offshore license areas in the Far East. To gather data, streamers and hydrophones were used equipped with technology tailored for Arctic sea applications. 2D seismic surveys in offshore areas of the Russian Far East were accompanied with exploration activities such as gravity, magnetic, and bathymetric surveys.

Growth in 2D Seismic Data Acquisition, linear km

3D SEISMIC SURVEYS

To detail the geology of prospects and support planning for exploration drilling on selected prospects, 5,822 sq. km of 3D seismic data were acquired in 2017 for eight offshore license areas in the Arctic and the Far East, including 3,671 sq. km on the Arctic shelf, and 2,151 sq. km on offshore areas in the Sea of Okhotsk and the Sea of Japan.

The gathered seismic data will enable optimal decision making on further exploration of license areas.

All 2017 exploration programs covering the waters of Russian seas were carried out in strict compliance with the Russian environmental regulation and in line with all applicable environmental and industrial safety standards. Continuous observations of marine wildlife were carried out during the marine exploration campaigns.

Growth in 3D Seismic Data Acquisition, sq. km
EXPLORATION DRILLING

On 3 April 2017, Rosneft began drilling the Central Olginskaya-1 well in the Khatangsky license area in the Laptev Sea – the first exploration well on the Russian Western Arctic shelf. The Company completed the pre-drilling phase in record time, successfully carrying out a most complex logistics project of bringing a drilling rig, and necessary materials and equipment to the drilling site. Based on the drilling results from the Central Olginskaya-1 well, the northernmost appraisal well in the Western Arctic, Russia’s State Reserves Committee confirmed in October 2017 the discovery of the Central-Olginskoye field within the Khatangsky license area in the Laptev Sea containing recoverable reserves (С1+С2) of over 80 mmt of crude.

FIELD GEOLOGY EXPEDITIONS

Three field geology expeditions were organized at the Company’s offshore license areas in the Far East and the Arctic, aimed at minimizing the geological risks related to certain elements of petroleum systems such as source rocks for oil and gas, reservoir rocks, and cap rocks. Representative rock samples were collected for laboratory analysis, the results of which will be used to update the geological model of the region and survey areas.

SOIL SURVEYS

Soil surveys were completed on four prospects within license areas. The results of comprehensive marine surveys provided full sets of data for well design and construction in the license area, including for engineering and environmental protection. Detailed data on soil composition in the area will allow experts to predict geological and geological engineering processes, as well as address the risks that might arise at the drilling phase.

ENVIRONMENTAL MONITORING

In 2017, Rosneft completed its environmental monitoring program and mapping of fisheries for environmental purposes at the following license areas: Gusinozemelsky (the Barents Sea), Pritaimyrsky (the Laptev Sea), Vostochno-Sibirsky-1 (the East Siberian Sea), Central-Tatarsky (Sea of Japan, Strait of Tartary). The scope of environmental baseline assessment of the marine ecosystems status included metocean, hydrologic, hydrochemical, hydrobiological, and ichthyological studies and surveys; sampling of seabed sediments and sea water; and marine mammal and bird observations. The field surveys were followed by laboratory analysis of samples and data collected at the field phase.

The surveys yield input data for environmental initiatives, environmental impact assessments for different exploration activities, and damage and compensation calculations for offshore project planning and implementation.

Rosneft also performs industrial environmental control and monitoring for all its offshore activities, including marine mammals and birds observations at 19 license areas in the Arctic region and two license areas in the Far East during G&G studies in Russian seas in 2017.

The Central-Olginskoye field within the Khatangsky license area in the Laptev Sea The Central-Olginskoye field within the Khatangsky license area in the Laptev Sea