Место работы автора, адрес/электронная почта: ФИЦ "Якутский научный центр СО РАН", Институт проблем нефти и газа СО РАН ; 677007, г. Якутск, ул. Автодорожная, 20 ; e-mail: a_obolkin@list.ru ; http://ipng.ysn.ru
Область научных интересов: Нефтегазовая геология, геофизика, сейсмостратиграфия, экология
ID Автора: SPIN-код: 4119-9660, РИНЦ AuthorID: 1090670
Количество страниц: 6 с.
This article contains data on the nature and level of study of the territories in which the north-eastern part of the Sakha Republic is located, which are potentially oil and gas bearing. In 1979-1992, seismic exploration of oil and gas was carried out in the Tastakh trough, the Zyryanka depression by JSC Yakutskgeofizika. The section of the Tastakh trough includes strata of terrigenous rocks of lithological unconstrained composition. Its capacity is 2.5-4.5 kilometers. The paper describes reflecting horizons based on Neogene-Quaternary, Jurassic-Cretaceous deposits. In addition, during the research, it was found that the Lower Cretaceous sediments present in the Tompon depression are divided by the Tomporuk-Kitchan zone of thrust divisions of the Late Cretaceous stage of activation of the Verkhoyano-Kolyma region. Upper Jurassic volcanogenic sedimentary rocks, Lower Cretaceous coal-bearing deposits are contained in the Zyryanka depression at 6 and 5 thousand meters, respectively. This article contains an opportunity for the allocation of time intervals, interpretation of sedimentary synchronous complexes of deflections, depressions, shelf. Seismic materials in these territories have a quality that can be recycled. The evidence of the need for this procedure appears during discussions on the topic of geological development, the structure of the mountain-folded Verkhoyano-Kolyma region, as well as the shelf that adjoins it. These data are confirmation of the presence of oil and gas in these territories. The work was carried out with the scientific equipment of the Center for Collective Use of the Federal research center ҺYakut Scientific Center of the Siberian Branch of the Russian Academy of Sciencesһ under grant No. 13.TsKP.21.0016. Support was received in the form of funds under the State Assignment from the Ministry of Science and Higher Education of the Russian Federation No. 122011100158-1.
Оболкин, А. П. Анализ сейсморазведочных исследований для оценки нефтегазоносности северо-востока Якутии / Оболкин А. П., Слепцова М. И., Севостьянова Р. Ф. ; Институт проблем нефти и газа // Успехи современного естествознания. - 2023. - N 12. - С. 193-198. - DOI: 0.17513/use.38191
DOI: 10.17513/use.38191
Количество страниц: 9 с.
- Краеведение. Археология. География. Биографии. История > Общие вопросы. География как наука. Географические исследования,
- Математика. Естественные науки > Экономическая геология. Месторождение полезных ископаемых,
- НАУКА ЯКУТИИ > КРАЕВЕДЕНИЕ. ГЕОГРАФИЯ. БИОГРАФИИ. ИСТОРИЯ > Общие вопросы. География как наука. Географические исследования,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Геология. Геологические и геофизические науки.
The materials of reports and publications on the seismogeological characteristics of the Anabar-Olenek structural zone, the shelves of the Laptev Sea and the East Siberian Sea have been studied. The work performed is aimed at clarifying, detailing and increasing the reliability of further research, previously updated in the process of scientific study of geological exploration materials of past years. The geological factors affecting the distribution of average and interval velocities of seismic reflection waves in the sedimentary cover are considered. For the entire territory, researchers have established an increase in reservoir and average velocities in the sedimentary cover as its thickness increases. This dependence is typical for the continental part of the platform. In the shelf deposits of the northern seas of Yakutia, the velocity dependence is determined by tectonic and magmatic factors, which become decisive for the Gakkel Ridge, Hyperborea, and the Novosibirsk-Chukotka structural zone. In the western part of the Laptev Sea, the surface of the consolidated crust corresponds to the surface of the Archean-Lower Proterozoic crystalline basement. In the rest of the territory, in the wave seismic field, the foundation is the asynchronous acoustic boundary of the surface of metamorphosed and dislocated strata with an age interval from the Riphean to the Paleogene. The observed complex wave pattern and various options for seismic reflector binding, in the opinion of the authors, are largely due to the structural and tectonic features of the evolution and interaction of the Siberian platform, Hyperborea, the Verkhoyansk-Kolyma folded region, the Arctic plume, the Novosibirsk-Chukotka structural-tectonic zone. The work was carried out with financial support within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation No. 122011100158-1 using the scientific equipment of the Center for Shared Use of the Federal Research Center ҺThe Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciencesһ within the framework of grant No. 13.TsKP.21.0016.
Оболкин, А. П. Особенности сейсмогеологических характеристик Анабаро-Оленекской структурной зоны, шельфов моря Лаптевых и Восточно-Сибирского моря / Оболкин А. П., Слепцова М. И. ; Институт проблем нефти и газа // Успехи современного естествознания. - 2023. - N 9. - С. 54-62. - DOI: 10.17513/use.38103
DOI: 10.17513/use.38103
Количество страниц: 10 с.
The results of geological exploration work of the past years on the structure, geological development and prospects of oil and gas potential of the northeastern territories of the Republic of Sakha (Yakutia) are summarized and analyzed. The available data on the geological and geophysical study of each of the prospective areas are systematized. There is a certain continuity in the development of scientific ideas. At the present stage, the main directions of geological exploration remain practically the same as in the middle of the last century. This is mainly coastal and intermountain depressions and deflections (Primorskaya, Tastakhskaya, Zyryanskaya, etc.), within which the total thickness of meso-Cenozoic deposits reaches 2 km or more. Taking into account the results of studying these deposits in natural outcrops in areas adjacent to the onboard parts of these depressions, the presence of terrigenous reservoir horizons with sufficiently high filtration and capacitance properties and overlapping substantially clayey strata - the shields - is predicted within the sedimentary cover. It is indicated that an additional role in the increase of hydrogeological closure of the earth's interior is played here, perhaps, by the fact of the presence and widespread development of a thick layer of permafrost in the upper part of the section. According to the results of geophysical studies, traps of various types have been detected, including traditional anticlinal structures with elements of tectonic and lithologic screening, traps associated with manifestations of thrust tectonics, non-anticlinal traps, etc. For the first time, the question is raised about the potential petroleum potential of Paleozoic carbonate and terrigenous deposits, which are accessible for deep drilling in the Kolyma-Indigir interfluve within the zone of the Prikolymskie uplifts. It was confirmed that all coastal depressions of different sizes are open to the north towards the East Siberian Sea and are developed mainly on its shelf, where the prevailing part of the initial geological resources of hydrocarbons is predicted. On the continental land, areas with optimal conditions for searching for oil and gas accumulations in different geological conditions are planned. Priority areas for setting initial works are recommended.
О строении и перспективах нефтегазоносности пришельфовых арктических территорий Восточной Якутии / В. С. Ситников, Н. Н. Алексеев, Н. А. Аржаков, А. П. Оболкин, К. А. Павлова, Р. Ф. Севостьянова, М. И. Слепцова // Наука и образование. — 2017. — N 4 (88), октябрь-декабрь. — С. 50-59.