Geochemical technique of organic matter research in deposits enrich in kerogene (the Bazhenov Formation, West Siberia)

The paper presents a study of the structure and reservoir properties of rocks of the Bazhenov formation in the sections of three wells located in different structural zones of the Priobskoye field. It is shown that the porosity of the samples varies from 0.02% to 6.95%, the absolute gas permeability of the rocks reaches 1.364 mD. It is established that the collectors in the Bazhenov formation are confined to silicite-radiolarites (possessing porosity associated with the leaching of radiolarian shells) and kerogen-clay-siliceous rock and kerogen-clay silicite (porosity is associated with the release of space between the clay-siliceous matrix and kerogen by ripening organic matter). The following secondary processes influenced the formation of voids in these lithotypes: recrystallization of radiolarians and local warming up.

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THREE-DIMENSIONAL MODEL OF ORGANIC MATTER DISTRIBUTION OF THE BAZHENOV FORMATION IN THE CONVERGATION ZONE OF THE MANSI SYNECLISE AND THE KRASNOLENINSK MEGAMONOCLIS

10.25205/978-5-4437-1248-2-169-172 ◽

2021 ◽

Author(s):

V. V. Lapkovskiy ◽

◽

E. V. Ponomareva ◽

Keyword(s):

Organic Matter ◽

Three Dimensional ◽

Dimensional Model ◽

Matter Distribution ◽

Three Dimensional Model ◽

Bazhenov Formation ◽

Organic Matter Distribution

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Distribution of organic matter in Bazhenov high-carbon formation

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2019-2-46-56 ◽

2019 ◽

pp. 46-56

Author(s):

M. S. Topchii ◽

N. V. Pronina ◽

A. G. Kalmykov ◽

G. A. Kalmykov ◽

M. M. Fomina ◽

...

Keyword(s):

Organic Matter ◽

Geological Structure ◽

Heterogeneous Structure ◽

Carbon Formation ◽

High Carbon ◽

Mixed Composition ◽

Shale Formations ◽

Bazhenov Formation ◽

Geological Features ◽

Micro Level

One of the most famous and promising shale formations in Russia is the Bazhenov formation. The ambiguity of ideas about its geological features, caused by the complex, heterogeneous structure of the strata, attracts the attention of many researchers. In this work, the Bazhenov formation is singled out in conjunction with its stratigraphic counterparts in the Bazhenov high-carbon formation (BVCHF). In this were considered the main characteristics of its allotment and distribution over the area, as well as the geological structure. Being an unconventional reservoir of hydrocarbons, BVCHF has properties of a petroleum-bearing rock, one of the main characteristics of which is organic matter, its type and maturity. The paper presents the results of the study of organic matter by various methods at the micro level, as well as their integration with larger-scale studies. The need for detailed consideration of the organic matter of the BVCHF is justified by the fact that it has a mixed composition and, as a consequence, a different degree of transformation and spatial distribution.

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