Introduction to Basin Modeling

Hantschel, Thomas; Kauerauf, Armin I.

doi:10.1007/978-3-540-72318-9_1

Cited by 48 publications

(105 citation statements)

References 5 publications

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“…where u is the excess pore pressure ( p – p hydrostatic ), C =0.09613 × 10 −6 Pa −1 is the Athy compaction constant, k is permeability, ϕ is the friction angle and µ is the temperature-dependent viscosity. We use a porosity-dependent permeability function for shales 50 and assume that the permeability further changes with hydrate saturation S h within the GHSZ 34 : …”

Section: Methodsmentioning

confidence: 99%

Submarine slope failures due to pipe structure formation

et al. 2018

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There is a strong spatial correlation between submarine slope failures and the occurrence of gas hydrates. This has been attributed to the dynamic nature of gas hydrate systems and the potential reduction of slope stability due to bottom water warming or sea level drop. However, 30 years of research into this process found no solid supporting evidence. Here we present new reflection seismic data from the Arctic Ocean and numerical modelling results supporting a different link between hydrates and slope stability. Hydrates reduce sediment permeability and cause build-up of overpressure at the base of the gas hydrate stability zone. Resulting hydro-fracturing forms pipe structures as pathways for overpressured fluids to migrate upward. Where these pipe structures reach shallow permeable beds, this overpressure transfers laterally and destabilises the slope. This process reconciles the spatial correlation of submarine landslides and gas hydrate, and it is independent of environmental change and water depth.

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Section: Methodsmentioning

confidence: 99%

Submarine slope failures due to pipe structure formation

et al. 2018

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“…One-dimensional basin and petroleum systems modelling was performed using PetroMod 1D software (Schlumberger Version 2012). The concept of modelling burial and temperature history based on outcrop information was discussed by Welte & Yükler (1981), Welte, Horsfield & Baker (1997) and Hantschel & Kauerauf (2009). Measured vitrinite reflectance data was used to calibrate the 1D model.…”

Section: Methodsmentioning

confidence: 99%

Organic geochemistry, petrology and palynofacies of Middle Devonian lacustrine flagstones in the Orcadian Basin, Scotland: depositional environment, thermal history and petroleum generation potential

et al. 2016

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During Middle Devonian time a thick succession of organic-rich, mainly lacustrine flagstones developed within the Orcadian Basin. These petroleum source rocks crop out in northern Scotland. Nineteen samples were studied using organic petrology, palynology and organic geochemistry in order to characterize kerogen type, depositional environment, thermal maturity and petroleum generation potential. Corg, carbonate and sulphur content as well as hydrogen index (HI) values are quite variable (e.g. HI from 79 to 744 mg HC/g Corg). Based on biomarker data, organic material mainly originates from aquatic organic matter deposited under lacustrine conditions with oxygen-depleted, but not permanently anoxic, bottom waters. Petrography reveals small quantities of vitrinite particles, indicating minor input of terrestrial material. This is supported by biomarker data and the palynofacies, which is characterized by a high amount of oil-prone amorphous organic matter (AOM) and generally few miospores. Maturity of the succession studied in Caithness and Orkney is between immature and oil mature. One-dimensional basin modelling shows that a significant remaining hydrocarbon generation potential exists within the Middle Devonian succession. In contrast to the low hydrocarbon generation in the onshore area, offshore oil generation was significant, especially after deposition of thick Upper Jurassic – Upper Cretaceous sediments. At the end of Cretaceous time, hydrocarbon generation ceased due to uplift. The contribution to known oil fields from the Devonian flagstones is a realistic scenario, including a contribution to the Beatrice oil field in the south of the modelled area.

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“…Throughout this study, a constant thermal conductivity of B = 1.5 W/m/K is used, which is based on the characteristic properties of shaly sandstones [Hantschel and Kauerauf, 2010]. With these assumptions, the steady state geotherm can be calculated:…”

Section: Stability Analysis Of Gas Hydratesmentioning

confidence: 99%

Modeling the fate of methane hydrates under global warming

Kretschmer

Biastoch

Rüpke

et al. 2015

Global Biogeochemical Cycles

127

146

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Large amounts of methane hydrate locked up within marine sediments are vulnerable to climate change. Changes in bottom water temperatures may lead to their destabilization and the release of methane into the water column or even the atmosphere. In a multimodel approach, the possible impact of destabilizing methane hydrates onto global climate within the next century is evaluated. The focus is set on changing bottom water temperatures to infer the response of the global methane hydrate inventory to future climate change. Present and future bottom water temperatures are evaluated by the combined use of hindcast high‐resolution ocean circulation simulations and climate modeling for the next century. The changing global hydrate inventory is computed using the parameterized transfer function recently proposed by Wallmann et al. (2012). We find that the present‐day world's total marine methane hydrate inventory is estimated to be 1146 Gt of methane carbon. Within the next 100 years this global inventory may be reduced by ∼0.03% (releasing ∼473 Mt methane from the seafloor). Compared to the present‐day annual emissions of anthropogenic methane, the amount of methane released from melting hydrates by 2100 is small and will not have a major impact on the global climate. On a regional scale, ocean bottom warming over the next 100 years will result in a relatively large decrease in the methane hydrate deposits, with the Arctic and Blake Ridge region, offshore South Carolina, being most affected.

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Introduction to Basin Modeling

Cited by 48 publications

References 5 publications

Submarine slope failures due to pipe structure formation

Submarine slope failures due to pipe structure formation

Organic geochemistry, petrology and palynofacies of Middle Devonian lacustrine flagstones in the Orcadian Basin, Scotland: depositional environment, thermal history and petroleum generation potential

Modeling the fate of methane hydrates under global warming

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