РАЗНОМАСШТАБНЫЕ ИССЛЕДОВАНИЯ ГЕОЛОГИЧЕСКОЙ НЕОДНОРОДНОСТИ БАЖЕНОВСКОЙ СВИТЫ КАК ОСНОВА ДЛЯ ОЦЕНКИ ЕЕ УГЛЕВОДОРОДНОГО ПОТЕНЦИАЛАстатья
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Дата последнего поиска статьи во внешних источниках: 23 сентября 2020 г.
Аннотация:In the article actual different-scale lithological, petrophysical and geochemical investigations of the Bazhenov rocks are considered. The authors stated hierarchy levels of structure model including nano-, micro-, rock layer and zones. New methods of investigation are described, specifically ''microstructure'' modeling. As a result, it was found that the rocks of Bazhenov formation have two types of kerogen distribution on microstructure level. The first type is characterized by even kerogen distribution as tiny aggregates in mineral intergrain space. In the second type kerogen gathered in restricted aggregates lenticular-layer shape. The main components are silica, clay, carbonate and kerogen. The rock layer consists of these components and it is a base of section zone determination. Section zones are different in texture and contents of rocks included, and in porosity types, reservoir types that give an opportunity for hydrocarbon potential evaluation. The lower zone has intercalation of kerogen-clay and clay-kerogen silicite, the upper part has an interval build of kerogen-clay-carbonate and clay-carbonate-kerogen silicite. In the lower part of middle zone clay-kerogen and kerogen-clay silicite are prevalent, in the upper part of zone interval of kerogen-clay-carbonate and clay-carbonate-kerogen silicite are found. In the upper zone of section kerogen-clay-carbonate and clay-carbonate-kerogen silicite are prevalent.