The impact of the peculiarities of the geological and geophysical structure of Domanic deposits on the assessment of the hydrocarbons reserves and resources

UDK: 553.98(470.4/.5)
DOI: 10.24887/0028-2448-2019-12-16-20
Key words: Domanic formation, unconventional reservoir, temporary method of reserves calculation, natural reservoir, organic porosity, interpretation of geological and geophysical studies, geochemical studies
Authors: A.А. Vashkevich (Gazprom Neft PJSC, RF, Saint-Petersburg), K.V. Strizhnev (Technological Center Bazhen LLC, RF, Saint-Petersburg), V.A. Shashel (Gazpromneft NTC LLC, RF, Saint-Petersburg), O.A. Zakharova (Gazpromneft NTC LLC, RF, Saint-Petersburg), D.E. Zagranovskaya (Gazpromneft NTC LLC, RF, Saint-Petersburg), N.V. Morozov (Gazpromneft NTC LLC, RF, Saint-Petersburg)

Gazprom Neft Company has been organizing a directed exploration for the study of Domanic formation since 2016. Domanic bituminous deposits is a complex object for predicting and prospects estimation. It is associated with the low state of knowledge and structural features of these deposits, as well as the absence of single valued criteria which determine the prospects of this type deposits. The expansion to new territories is not justified without an accurate definition possible production characteristics of Domanic deposits and oil-producing potential for bituminous formation of Volga-Ural Basin. The article considers the special aspects of geological, geophysical and geochemical parameters, determined to study a reliable estimate of the Domanic deposits’ reserves and resource potential. The structure conceptual model is proposed, as well as a number of methodological techniques and useful recommendations to study and analysis of the bituminous formation. As a result of Domanic-type sediments studying, a number of geological, geophysical and geochemical uncertainties were identified, including geological-geophysical conceptual solutions, such as ambiguous vertical object boundaries and extension area; reservoir properties, determination of organic porosity, and a number of geological and geochemical parameters that affect the potential of considered deposits. Domanic bituminous deposits are not clearly understood; a number of questions remain that can be solved by performing scientific studies with a number of experiments. Domanic deposits are characterized by a wide range of occurrence with a different number of bituminous packs, ambiguous geological, geophysical and geochemical properties over the extension area. There are a lot of questions to the methodological determination of the studied geological and geophysical parameters without deeply developed methods, norms and determination.


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