The West Siberian Super Basin: The largest and most prolific hydrocarbon basin in the world

Khafizov, S.F.; Syngaevsky, Pavel E.; Dolson, John

doi:10.1306/11192121086

Cited by 12 publications

(8 citation statements)

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“…Permafrost zonation in this map was taken from Obu et al (2018), version 5.0. Oil and gas fields' locations are indicated after Khafizov et al (2022). Peatland cover is based on Lehner and Döll (2004).…”

Section: Methodsmentioning

confidence: 99%

“…The West Siberian Basin, which overlaps geographically with the West Siberia Lowlands, is the largest known hydrocarbon reservoir in the world with more than 30,000 Pg of proven methane deposits (Khafizov et al, 2022). Oil and gas reservoirs are located in late‐Jurassic and Cretaceous deposits, between 0.6 and 3 km below the surface (Khafizov et al, 2022; Milkov, 2010). According to this hypothesis, methane from source deposits migrates to the upper layers through faults and fractures in impermeable cap deposits, then discharges with groundwater on the surface.…”

Section: Introductionmentioning

confidence: 99%

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Methane in West Siberia terrestrial seeps: Origin, transport, and metabolic pathways of production

Сабреков

Terentieva

McDermid

et al. 2023

Global Change Biology

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The expansive plains of West Siberia contain globally significant carbon stocks, with Earth's most extensive peatland complex overlying the world's largest‐known hydrocarbon basin. Numerous terrestrial methane seeps have recently been discovered on this landscape, located along the floodplains of the Ob and Irtysh Rivers in hotspots covering more than 2500 km2. We articulated three hypotheses to explain the origin and migration pathways of methane within these seeps: (H1) uplift of Cretaceous‐aged methane from deep petroleum reservoirs along faults and fractures, (H2) release of Oligocene‐aged methane capped or trapped by degrading permafrost, and (H3) horizontal migration of Holocene‐aged methane from surrounding peatlands. We tested these hypotheses using a range of geochemical tools on gas and water samples extracted from seeps, peatlands, and aquifers across the 120,000 km2 study area. Seep‐gas composition, radiocarbon age, and stable isotope fingerprints favor the peatland hypothesis of seep‐methane origin (H3). Organic matter in raised bogs is the primary source of seep methane, but observed variability in stable isotope composition and concentration suggest production in two divergent biogeochemical settings that support distinct metabolic pathways of methanogenesis. Comparison of these parameters in raised bogs and seeps indicates that the first is bogs, via CO2 reduction methanogenesis. The second setting is likely groundwater, where dissolved organic carbon from bogs is degraded via chemolithotrophic acetogenesis followed by acetate fermentation methanogenesis. Our findings highlight the importance of methane lateral migration in West Siberia's bog‐dominated landscapes via intimate groundwater connections. The same phenomenon could occur in similar landscapes across the boreal‐taiga biome, thereby making groundwater‐fed rivers and springs potent methane sources.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methane in West Siberia terrestrial seeps: Origin, transport, and metabolic pathways of production

Сабреков

Terentieva

McDermid

et al. 2023

Global Change Biology

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“…Территория исследований относится к арктической зоне Западной Сибири, для которой характерны наличие многолетней мерзлоты и обилие болот, озёр и рек, а также наличие крупнейших залежей углеводородов в мире [16]. Почвенный покров представлен в основном торфяными, преимущественно олиготрофными, почвами.…”

Section: объекты и методы исследованияunclassified

Distribution of stable Н, О and С isotopes in natural waters in the area of the Taz oil and gas condensate field (Yamalo-Nenets autonomous region)

Lepokurova,

Ivanova,

Pyrayev

et al. 2024

IZVESTIYA

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Relevance. The study of isotopic composition of water and dissolved substances makes it possible to determine not only their genesis, but also the fractionation processes occurring in the “water–rock–gas–organic matter” system over time, i. e. as different stages of the evolution of water composition pass through. Interest in the groundwater of the Arctic regions of Western Siberia is additionally associated with the widespread occurrence of oil deposits at the depths of formation waters and the possible influence of cryogenic metamorphization processes on composition of near-surface waters. Aim. To study and compare the isotopic composition of oxygen, hydrogen and carbon in natural waters of the Yamalo-Nenets autonomous region to identify conditional isotopic markers, as well as to be able to trace the evolution of the isotopic composition of waters along a vertical section in the area of the Taz oil and gas condensate field. Objects. Surface (river, soil and lake), underground waters of the active water exchange zone of the Yamalo-Nenets autonomous region and formation waters of oil and gas deposits of the Taz field. Methods. The study of the isotopic composition of oxygen, hydrogen, and carbon of water-dissolved carbon dioxide was carried out in the Research Equipment Sharing Center at the Institute of Geology and Mineralogy SB RAS using Isotope Ratio Mass Spectrometer FinniganTM MAT 253 equipped with H/Device and GasBench II for sample preparation. Results and conclusions. The paper introduces the data on isotopic composition of O, H and C for natural waters of the Yamalo-Nenets autonomous region. The authors have determined the characteristic trends in changes in the isotopic composition of water and dissolved carbon dioxide for various water bodies. Surface and underground waters with active water exchange in terms of isotopic composition (δD and δ18О) are infiltration. As water moves down the section, with an increase in the time of interaction of the “water–rock” system and increase in temperatures, the isotopic composition becomes significantly heavier with a slope from the GMWL to the right. The authors compiled the diagram of the evolution of water-dissolved carbon isotopic composition in the region according to the obtained and some literature data. Despite the wide range of δ13C values from –30.4 to 23.6 ‰, there are, obviously, only two sources of carbon dioxide in the region: biogenic and atmospheric, with biogenic being predominant for groundwater.

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“…ST is a giant gas field located in the north of the West Siberia Basin (Figure 1) [1,2]. Previous studies in this area often focus on post-Jurassic shallow marine to continental sandstone reservoirs which host most of the dry gas reserves.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies in this area often focus on post-Jurassic shallow marine to continental sandstone reservoirs which host most of the dry gas reserves. A lot has been done in terms of its tectonostratigraphic evolution [3,4], structural framework [5,6], stratigraphic sequence division and correlations [2,7], interpretation of the sedimentary facies and facies associations [8,9], as well as hydrocarbon accumulations [1,[10][11][12]. However, limited research has been conducted on the underlying Jurassic strata which are expected to host potential oil and wet gas, and may represent future exploration and exploitation targets [1,2].…”

Section: Introductionmentioning

confidence: 99%

Sequence Stratigraphy of the Jurassic Strata and Occurrences of Potential Sandstone Reservoirs in the ST Gas Field, Northern West Siberia Basin

Chen,

Yang,

Talha

et al. 2023

Applied Sciences

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Jurassic strata in the ST gas field of the northern West Siberia Basin have been regarded as a potential exploration target with undiscovered hydrocarbon resources. However limited research has been performed on the sequence stratigraphy of the Jurassic strata, as well as its sandstone distribution controlled by variable sea level change and sediment input. In this paper, four third-order sequences (SQ1, SQ2, SQ3, and SQ4) and nine fourth-order sequences for the Jurassic strata are interpreted based on seismic facies analysis and the lithology stacking patterns of seven wells. SQ1 is characterized by the special Bazhenov Formation which is featured by regionally distributed deep marine shales. SQ2 (J1) is composed of a coarsening upward sequence, the base of which is an unconformable surface that can be recognizable in both seismic profiles and well logging data. SQ3 (J2-J8) is composed of a complete fining-upward and coarsening-upward sequence, showing a series of transgressive and regressive successions. A complete SQ4 has not been drilled through by all the seven wells, only showing a coarsening upward succession on its top (J9) which evolves into a fining upward succession at the base of SQ3. Combined with the seismic inversion result, which predicts sandstone distribution, a sequence evolution model was built for SQ3 showing a full unit of transgressive system tract and highstand system tract (TST-HST) which often occurs in shallow marine shelves. During sequence development, most reservoir sandstones are deposited in the shelf and tidal delta environment at the bottom of the TST and the top of HST, and mudstones are deposited as shelf mudstones, especially at maximum flooding surface. That is controlled by both accommodation and sediment input. Generally, under this sequence framework, the depositional architecture can be further analyzed with implications for source rock, reservoir sandstones, and sealing rock, which may guide future gas exploration and exploitation in this area.

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The West Siberian Super Basin: The largest and most prolific hydrocarbon basin in the world

Cited by 12 publications

References 0 publications

Methane in West Siberia terrestrial seeps: Origin, transport, and metabolic pathways of production

Methane in West Siberia terrestrial seeps: Origin, transport, and metabolic pathways of production

Distribution of stable Н, О and С isotopes in natural waters in the area of the Taz oil and gas condensate field (Yamalo-Nenets autonomous region)

Sequence Stratigraphy of the Jurassic Strata and Occurrences of Potential Sandstone Reservoirs in the ST Gas Field, Northern West Siberia Basin

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