Geological structure and some features of formation anomalous cuts of the Bazhenov Formation in Western Siberia

Бембель, С Р; Tsepliaeva, Anna

doi:10.15593/2224-9923/2014.10.1

Вестник ПНИПУ. Геология. Нефтегазовое и горное дело

2014

DOI: 10.15593/2224-9923/2014.10.1

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Geological structure and some features of formation anomalous cuts of the Bazhenov Formation in Western Siberia

С Р Бембель¹,

Anna Tsepliaeva²

Abstract: Тюменский государственный нефтегазовый университет, Тюмень, Россия Предмет исследованийаномальный разрез отложений баженовской свиты Западной Сибири. Представлено несколько гипотез формирования аномального разреза баженовской свиты, принадлежащих разным ученым: подводно-оползневая модель, модель палеоостровов, седиментологическая модель. Рассмотрены особенности формирования отложений баженовской свиты. Авторы раскрывают и анализируют причины образования аномальных разрезов баженовской свиты и выявляют необходи… Show more

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Structure and genesis of the Achimov olistostromic strata of Western Siberia

Sharafutdinov

2023

Georesursy

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The question of the genesis of the anomalous Bazhen-Achimov zones remains to be one of the most controversial problems in Western Siberia. By now, about dozen hypotheses of the sedimentary environment of this specific formation have been proposed. However, none of these hypotheses is generally accepted. All hypotheses have been classified by genesis and their critical analysis is given in the article. The solution is closely related with experience of the geological exploration works, since the prospects of oil and gas are associated with these deposits. The article highlights the key features of the structure of the anomalous section’s zones based on drilling and seismic data. The classification of the hypotheses is given and the features of sedimentation in the Bazhenov and Achimov times are highlighted. An accumulated data has allowed us to substantiate the olistostromous genesis of the anomalous section. Based on a set of data, including paleogeographic, sedimentological, paleotectonic reconstructions, a principal detailed model of the sedimentary environment of olistostromes is proposed for the first time. The proposed model seems to be the most logical, supported by the actual data known to date, is the most universal and fits into the paleogeographic situation and tectonic regime that prevailed in the Achimov time.

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Structure and genesis of the Achimov olistostromic strata of Western Siberia

Sharafutdinov

2023

Georesursy

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Integrated approach to the typification and localization of deposits of the anomalous section of the Bazhenov formation of the Frolov oil and gas region

Generalenko

Koltsun

Isaeva

et al. 2021

PROneftʹ, Prof. nefti

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Introduction. The subject of the study of this work is the deposits of the anomalous section of the Bazhenov formation (ASB) of Western Siberia, the disturbed occurrence of which was recorded by 2D, 3D seismic exploration and borehole data at many fields of the Frolov oil and gas region. The research area unites the company’s assets in the KhMAO and the Tyumen region, which are part of the large hydrocarbon cluster “ZIMA”. Aim. In order to typify various complexes of rocks of the Bazhenov formation and further localization of deposits, a comprehensive core analysis, GIS and seismic studies were performed. Materials and methods. According to the results of lithological study of the core and petrophysical interpretation of logging diagrams, have been identified various types of rocks in the interval of the Bazhenov formation. According to the results of the interpretation of the seismic survey materials, contoured zones that differ in the wave pattern by different coherence of the axes of common phase. The revealed differences in seismic sections compared with borehole data and geological bodies mapped based on the obtained patterns. Results. Based on a comprehensive interpretation of the core, GIS and seismic studies, established the zonality of the distribution of various types of deposits of the Bazhenov formation, the relationship of the development of ASB zones with the introduction of Early Cretaceous sedimentary bodies and showed the introduction of detrital material from the overlying rocks. Conclusions. The authors of the article conclude that the development of anomalous sections of the Bazhenov formation involves several stages of the introduction of landslide bodies of overlying rocks, according to the gradation of Neocomian clinocyclites in the north-west direction. Within the study area, mapped three large landslide bodies in the Bazhenov formation interval, each of which was formed an internal zonality and because of the introduction of rocks from the overlying interval.

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Geological structure and some features of formation anomalous cuts of the Bazhenov Formation in Western Siberia

Cited by 2 publications

References 0 publications

Structure and genesis of the Achimov olistostromic strata of Western Siberia

Structure and genesis of the Achimov olistostromic strata of Western Siberia

Integrated approach to the typification and localization of deposits of the anomalous section of the Bazhenov formation of the Frolov oil and gas region

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