Composition of Shale Oil from Poorly Permeable Carbonate Rocks of Domanikovian Deposits of Dankov-Lebedyan Horizon of Romashkino Field

Kayukova, G. P.; Mikhailova, A. N.; Kosachev, I. P.; Nazimov, N.A.; Sotnikov, O. S.; Evdokimov, Alexander; Хисамов, Р С

doi:10.1007/s10553-018-0912-0

Cited by 5 publications

(6 citation statements)

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“…According to the data of [36], along with the destruction processes, it is also possible to release light hydrocarbons under the influence of hydrothermal factors from the kerogen matrix in the structure of which they remain in the free state. The chromatograms of the products of hydrothermal experiments are similar to the chromatograms of shale oil extracted from the Dankov-Lebedyan deposits of the Bavlinskaya area in the territory of Tatarstan [30]. This is reflected in the values of chromatographic indices (Table 4).…”

Section: Characteristic Of Products Of Hydrothermal Experimentssupporting

confidence: 60%

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Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

et al. 2018

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The model experiments regarding the conversion of organic matters from carbonate rock samples of Dankov-Lebedyan deposits of Zelenogorskaya area and siliceous-carbonate rocks of Semiluki-Mendym deposits of Berezovskaya area of Domanic formations of Romashkino oil field were carried out. Two types of experiments were carried out: (1) the hydrothermal treatment of rocks at a temperature of 350°C in the presence of carbonic acid and a water content of 30%; (2) pyrolysis at temperatures of 350 and 600°C in the presence of hydrogen. The yield and quality of extracted hydrocarbons from the rocks depending on the mineral composition of rocks, content and composition of organic matter, and thermal stability of kerogen under hydrothermal influences were evaluated. Application of electron paramagnetic resonance in pyrolysis processes revealed the difference in mineral content of rocks (Mn2+, SO3−, and SO2− ions) and free radicals R∗, as well as in vanadyl ion (VO2+) concentration. It is established that an increasing temperature of pyrolysis promotes the formation of new free organic radicals in rock samples: in Domanic rocks of Semiluki-Mendym deposits at 350°С and in carbonate rocks of Dankov-Lebedyan horizon at 600°С. This indicates different ability of oil-generating potential of rocks with hydrothermal and pyrolysis technologies.

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Section: Characteristic Of Products Of Hydrothermal Experimentssupporting

confidence: 60%

“…The content of free hydrocarbons (S 1 ) and kerogen (S 2 ) in the rock is also reduced: S 1 from 2.29 to 0.04 mg/g of rock and S 2 from 1.49 to 0.05 mg/g of rock. The rock samples were studied by Rock-Eval method after extraction [30].…”

Section: Resultsmentioning

confidence: 99%

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

et al. 2018

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“…Along the destruction processes, the release of light hydrocarbons from the kerogen matrix is also possible . Under such conditions, the chromatogram becomes similar to the oil shale chromatogram from the Bavlinskoye oil field . It should be noted that chromatograms of saturated fractions, received at 200 and 250 °C from rock samples of the Berezovskaya area, are similar to those of the initial extracts, the chromatograms of which are given in ref .…”

Section: Resultsmentioning

confidence: 53%

“…64 Under such conditions, the chromatogram becomes similar to the oil shale chromatogram from the Bavlinskoye oil field. 66 It should be noted that chromatograms of saturated fractions, received at 200 and 250 °C from rock samples of the Berezovskaya area, are similar to those of the initial extracts, the chromatograms of which are given in ref 27. Because the yield of extracts from rocks at given temperatures increases compared to the initial extract (Table 2), it means that the intensive extractions of free hydrocarbons from rocks are carried out at relatively low temperatures.…”

Section: Methodsmentioning

confidence: 91%

Hydrothermal Impact on Hydrocarbon Generation from Low-Permeable Domanic Sedimentary Rocks with Different Lithofacies

et al. 2021

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This study is intended to reveal the impact of hydrothermal treatments at temperatures of 200, 250, 300, and 350 °C on organic matter (OM) of low-permeable rocks of two different lithofacies types (carbonate and carbonate–siliceous rocks) from Domanic deposits of Upper Devonian Tatarstan. Autoclave experiments were carried out in a carbon dioxide environment. The content of OM and the yield of rock extracts, as well as the stability of kerogen structures to hydrothermal influences, were evaluated. The content of saturated hydrocarbons in the rock extracts increases after the hydrothermal transformation of kerogen and high-molecular-weight compounds, while the content of aromatic hydrocarbons and asphaltenes decreases. The results of molecular weight distribution of normal alkanes and isoprenoids show that rock extracts according to the classification of A. Petrov correspond to the A type of crude oil. Exposing hydrothermal factors on Domanic rocks at low and high temperatures provides more total extraction of hydrocarbons from rocks. The most intensive kerogen transformation process occurred at 350 °C. Hydrothermal impact on the carbonate rocks leads to almost complete transformation of kerogen with the formation of hydrocarbons, while in carbonate–siliceous rock samples, significant part of kerogen does not undergo transformation. The specific features of some biomarkers such as alkanes, aryl isoprenoids, steranes, and terpanes in petroleum products before and after hydrothermal treatment were discussed. The results indicate the general genetic nature of OM, but different geochemical conditions of its maturation in the sedimentary strata. Thus, steam injection leads to different hydrocarbon generating potential from different reservoir rocks.

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“…The results of the investigation justify the correspondence of hydrocarbon fluids to a single genetic series and its connection with sapropel matter of marine genesis [33,39,40]. The hydrocarbon composition of shale oil after hydrothermal treatment becomes similar to the shale oil produced by PJSC Tatneft from low-permeable carbonate rocks of the Dankovo-Lebedyan horizon of the Bavlinsky reservoir [14,57,58], which is located in the east of Tatarstan.…”

Section: Zelenogorskaya Area Berezovskaya Areamentioning

confidence: 52%

Composition of Oil after Hydrothermal Treatment of Cabonate-Siliceous and Carbonate Domanic Shale Rocks

et al. 2021

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The hydrocarbon compositions of shale oils, generated from two different lithological–facial Domanic deposits of the Tatarstan Republic (Russia), were studied under hydrothermal impact with 30% of water addition in a 350 °С and CO2 environment. The samples were extracted from carbonate–siliceous rocks of the Semiluky–Mendym deposits of the Berezovskaya area, and carbonate deposits of the Dankovo–Lebedyan horizon of the Zelenogorskaya area of the Romashkino oil field. The distinctive features of rocks are in the composition and content of organic matter (OM), its thermal stability, as well as the structural-group composition of the shale oil products. The hydrothermal treatment of the rock samples increased the content of saturates and decreased the content of aromatics, resins and asphaltenes in the composition of crude oil. The decomposition of the polymer-like kerogen structure and destruction processes of high-molecular compounds, such as resins and asphaltenes, are accompanied with the formation of substances highly rich in carbons—carbenes and carboids. The contents of n-alkanes and acyclic isoprenoids increase in the composition of saturated hydrocarbons. According to the chemical classification of Al. A. Petrov, the character of the molecular mass distribution of such substances corresponds to oil type A1, which is considered paraffinic. The contents of dibenzothiophene, naphthalene and phenanthrene are increased in the composition of aromatic hydrocarbons, while the contents of tri-methyl-alkyl-benzene and benzothiophene are decreased. The increase in the aryl isoprenoid ratio (AIR = С13–С17/С18–С22) and maturity parameter (4-MDBT/1-MDBT) under the influences of hydrothermal factors indicates the increasing thermal maturity degree of the hydrocarbon system. The differences in the distribution behavior of saturated and aromatic hydrocarbons—biomarkers in rocks of various lithological-facies types, which are reasoned by different conditions of initial organic matter transformation as well as under the impact of hydrothermal factors—were revealed.

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Composition of Shale Oil from Poorly Permeable Carbonate Rocks of Domanikovian Deposits of Dankov-Lebedyan Horizon of Romashkino Field

Cited by 5 publications

References 1 publication

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

Hydrothermal Impact on Hydrocarbon Generation from Low-Permeable Domanic Sedimentary Rocks with Different Lithofacies

Composition of Oil after Hydrothermal Treatment of Cabonate-Siliceous and Carbonate Domanic Shale Rocks

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