Tectonic causes of uneven cementation zones distribution in the bituminous sandstones productive part of the Sheshminsky horizon of the South Tatar arch

Mullakaev, A; Delev, A.N.; Usmanov, Sergey; Sudakov, Vladislav; Khasanov, R. R.

doi:10.24887/0028-2448-2018-2-23-25

Cited by 5 publications

(1 citation statement)

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“…The bitumen deposit is around 20 m thick in the dome of the structure. The bitumen reservoir is lithologically represented by greywacke sandstones [7]. The optical microscopic tests show that the detrital component accounts 70-85% and cemented material accounts 15-30% in the rock.…”

Section: Methodsmentioning

confidence: 99%

Effect of lithological heterogeneity of bitumen sandstones on SAGD reservoir development

Королев

Usmanov

Nikolaev

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Section: Methodsmentioning

confidence: 99%

Effect of lithological heterogeneity of bitumen sandstones on SAGD reservoir development

Королев

Usmanov

Nikolaev

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Construction of geological model of a shallow super-viscous oil deposit based on core analyses and geophysical monitoring data

Delev

Нургалиев

Сидоров

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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Deficiency of fossil minerals, limited reserves of conventional hydrocarbon raw materials indicates the need to involve in the fuel and energy complex of other sources of hydrocarbons. Fields of super-viscous oil are one of the sources. Development of super-viscous oil deposits opens new challenges in the field of building geological models associated with the shallow occurrence of these deposits. This article is devoted to the study of sediments of the Permian sedimentary complex containing super-viscous oil deposits. Study object is Sheshmian sandstone pack of the Ufimian stage. The pack is composed of sands and sandstones with different degree of carbonate cementation with small interlayers of siltstones. Cementation is the main factor which affect reservoir quality. In the process of analysis and preparation of the initial data and, subsequently, the geological model construction, the main features of the super-viscous oil deposits were revealed.

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Thermal properties of the bituminous sandy rocks of the Volga-Ural oil and gas province.

Mullakaev

Khasanov

2019

IOP Conf. Ser.: Earth Environ. Sci.

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Natural accumulations of bitumen in the Volga-Ural oil and gas province are unconventional sources of hydrocarbons. They are mainly concentrated in the Republic of Tatarstan and are confined to psammitic (sandy) rocks of lower Permian age (Sheshmian Horizon of Ufimian Stage). Sands and sandstones belong to the greywacke group, so rock-forming minerals are represented by quartz, feldspars and effusive fragments. The internal structure of the bitumen-containing reservoir is characterized by an extreme degree of lithological and mineralogical heterogeneity, which is the result of the imposition of a whole complex of processes. Since the beginning of the development of bitumen deposits by thermal methods, the issues of studying the internal heterogeneity and its influence on the production process become particularly acute. Internal reservoir heterogeneity may prevent uniform heating and the formation of a full-fledged steam chamber. Sands and sandstones of the productive part are divided into three rock types (bituminous sands, bituminous sandstones and residual bituminous sandstones). Thermal studies using methods of thermogravimetry (TG) and differential scanning calorimetry (DSC) showed differences in rock types in terms of the decomposition of mineral and organic components, as well as the removal of gaseous components. As a result of thermal studies, it was found that not only loose, bitumen-saturated sands, but also denser, cemented rock types can serve as a reservoir for hydrocarbons. This is due to the conservation of hydrocarbon fractions in the intergranular space during the formation of carbonate cement.

show abstract

Tectonic causes of uneven cementation zones distribution in the bituminous sandstones productive part of the Sheshminsky horizon of the South Tatar arch

Cited by 5 publications

References 0 publications

Effect of lithological heterogeneity of bitumen sandstones on SAGD reservoir development

Effect of lithological heterogeneity of bitumen sandstones on SAGD reservoir development

Construction of geological model of a shallow super-viscous oil deposit based on core analyses and geophysical monitoring data

Thermal properties of the bituminous sandy rocks of the Volga-Ural oil and gas province.

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