Gazovaya promyshlennost’ № 07 2022

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GEOLOGY AND GAS FIELDS DEVELOPMENT

» Geology and oil-and-gas presence of the South of the East Siberian petroleum megaprovince

The article characterizes the geology and oil-and-gas presence of individual petroleum bearing regions and structural elements of the South of the East Siberian petroleum megaprovince. It also shows the effect of tectonic dynamics on the gas and oil accumulation in various parts of the considered territory, depending on the compression stress induced by orogens. The geodynamic factor along with the thermal one has gained a major role in initiating organic matter transformation processes in ancient source rocks and generating in those zones where only hydrocarbon gas compression has an active effect. The hydrocarbon gases ensured formation (gas pools), reformation (multisystems of various transition stages), and destruction (oil accumulations) of hydrocarbon fields in traps. The Lena-Angara step is most distinctly affected by geodynamics. Among the multiple issues, the ones remaining and to be clarified are the complex geology of all the megaprovince’s petroleum bearing regions and the formation conditions of various phase state fields within them, primarily in the South of the territory under study.

Keywords: EAST SIBERIAN PETROLEUM MEGAPROVINCE, GEODYNAMICS, DISLOCATION WITH A BREAK IN CONTINUITY, COMPRESSION STRESS, ANTECLISE, PETROLEUM BEARING REGION, FIELD, POOL, GAS, OIL.

SHELF DEVELOPMENT

» Issues of systematic and consistent development of the Arctic subsoil

The article presents authors’ view of the approaches to the sequence of Arctic subsoil development. It is taken into account already explored and promising hydrocarbon resources in the Russian sector of the Arctic, which, according to a number of reputable scientists, will play a huge role in the second half of the 21st century. The data on the study of the Arctic Ocean seas water areas by seismic exploring and drilling are presented. A low degree of research coverage of the territory east of the Kara Sea is shown. The main reasons for this situation are named. Some physical and geographical features of the Arctic and Far Eastern seas (depths, presence of islands, features of the bottom topography) are considered. We propose an optimal sequence of planned works on the study and development of Arctic resources based on coastal areas and islands. The prospects of a new technical solution (underwater gas liquefaction) are shown in the development of deepwater resources in long-term freezing water areas. In conclusion, there are the proposed stages of systematic and consistent development of the Arctic subsoil.

Keywords: ARCTIC WATERS, ARCTIC, FAR EAST, ARCTIC OCEAN, ISLAND, OIL AND GAS RESOURCES, SEISMIC EXPLORATION, DRILLING.

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