Prospects for the allocation of productive sites in the Jurassic interval of the section in the territory of Syngegan terrace were considered, based on the analysis of seismic survey, drilling and core studies. We identified the interrelation between productive sites of local oil deposits and the centers of rock area of destruction allocated according to seismic survey materials.

The middle Jurassic Tyumen sediments have been involved in the development of oil facilities in the territory of the Khanty-Mansiysk Autonomous Okrug — Ugra for the last decade. The Jk2-5 formation is represented by complex interlayering of poorly permeable sandy-aleurite lenses and clay barriers with low reservoir properties. Recoverable oil reserves of the Jk2-5 formation on the Krasnoleninsky arch amounts to several hundred million tons. According to the collector permeability, the reserves of the object are classified as hard-to-recover. There are no effective technologies to involve such reserves in the development now. Standard methods of drilling and operation of inclined wells doesn't allow achieving acceptable oil production rates under these reservoir conditions. Based on the analysis of seismic survey data, correlation of well sections, field information, a geological model of a productive reservoir on the Krasnoleninsky arch was created. The multi-step hydrodynamic calculations made it possible to clarify the parameters of the profile of horizontal wells, the number and configuration of operations for multi-stage hydraulic fracturing. Based on the results of the research, recommendations were developed to well placement, drilling and well operation for specific field areas in order to increase the oil resource development efficiency.

Based on the well-known results of studies of the ether-geosoliton concept of the growing Earth, the article presents the conclusions that made it possible to propose a model of thermonuclear synthesis of chemical elements that form renewable reserves of developed oil and gas fields. It was revealed that local zones of abnormally high production rates of production wells and, accordingly, large cumulative production at developed fields in Western Siberia are due to the restoration of recoverable reserves due to geosoliton degassing. Therefore, when interpreting the results of geological and geophysical studies, it is necessary to pay attention to the identified geosoliton degassing channels, since in the works of R. M. Bembel and others found that they contributed to the formation of a number of hydrocarbon deposits in Western Siberia. When interpreting the results of geological-geophysical and physicochemical studies of the fields being developed, it is recommended to study the data of the ring high-resolution seismic exploration technology in order to identify unique areas of renewable reserves, which can significantly increase the component yield of hydrocarbon deposits.

The article deals with the results of studies of the geological structure features of the US2 oil-bearing stratum in the upper part of Tyumen suite (a case study of the Surgut arch fields). Object US2 is represented by low-permeability reservoirs with complex facies variability and an uneven distribution of reservoir properties over area and section, characterized by a thin-layered structure. In this regard, the oil reserves of the US2 structure are naturally classified as hard-torecover, requiring additional work to further study its structure and features for effective development of oil reserves. The facies of river channels, riverbank shoals and sands of floodplain spills were identified, based on the analysis of geological and geophysical materials: 3D seismic survey, core studies, well testing data, sampling and dynamics of wells operation in the area of the deposits in the upper part of the US2 horizon. Based on the analysis of the detailed correlation, three types of section of the US2/1 formation were identified, differing in the nature of the reservoir spread. Based on the 3D seismic survey data, in order to clarify the structure of the US2 formation, a dynamic analysis of the attributes of the seismic record was carried out. Significant coefficients of cross-correlation between the dynamic characteristics and production parameters of the US2/1 formation were not obtained. It is necessary to develop optimal methods for exploration and clarification of the features of the geological structure and forecasting the distribution of reservoir properties, rational methods and approaches to the development of hard-to-recover reserves of Tyumen suite objects with a complex distribution of reservoir properties and variability of productive thicknesses.

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 необходимость рассмотрения этих явлений в тесной связи с геодинамическими и тектоническими процессами. Знание генезиса аномальных разрезов позволит правильно проектировать поисковые работы, точнее оценивать запасы углеводородов в отложениях такого типа. Отмечено, что благодаря сейсмическим исследованиям можно выделить различные типы аномального разреза отложений баженовской свиты, картировать их и прогнозировать поиск ловушек УВ, учитывая распространение зон аномального разреза как в песчано-алевролитовых отложениях баженовской свиты, так и в вышезалегающих породах ачимовской толщи. Сказано, что в связи со специфическими условиями залегания запасов баженовской свиты необходимы разработка и внедрение новых инновационных технологий поиска и разведки высокопродуктивных участков в этом интервале геологического разреза Важной задачей становится введение в активную разработку трудноизвлекаемых запасов залежей баженовских отложений. Решением проблемы обеспечения добычи нефти на действующих и вновь разбуриваемых месторождениях Западной Сибири станет создание технологии разработки баженовских отложений.