Marine Biogeochemistry

Subproject A4 Numerical Modelling

The formation of submarine gas hydrates and their spatial distribution in the subsurface depends on a variety of sensitive control parameters, e.g. the in-situ production of methane, the advection of dissolved and gaseous methane, the existence of fluid pathways as well as the porosity and permeability of sediments. Hence, the quantification of gas hydrate inventories is still largely unconstrained in most regions. This project aims at the numerical simulation of potential gas hydrate reservoirs for selected, well-known locations to predict their 3-D-distribution within the sedimentary sequence. In addition, we plan to give constraints on the long-term stability of gas hydrate reservoirs in order to get a better understanding of their temporal dynamics.

Methods
The numerical model „PetroMod“ (IES company), a standard exploration tool in the oil and gas industry will be used to develop a new, 3-D-model for the simulation of sub-seafloor gas hydrate occurrences. A major task is the implementation of biogeochemical approaches with respect to gas hydrate formation / dissolution as well as the temporal and spatial resolution of the basis model. This approach will particularly enhance our knowledge with regard to the simulation of pathways for fluid and gas transport in consolidated sediments and hence, the potential enrichment of gas hydrates within certain sedimentary strata.

3-D basin model approach for gas hydrate stability fields. Grey body: 8°C to 16°C temperature field Brown area: 400m to 1100m hydrate-bearing depth interval. Red lines: fracture development that allows bubble migration.

Literatur

Author

Title

Year

Journal/Proceedings

Reftype

DOI/URL

Clennell, M., Hovland, M., Booth, J.S., Henry, P. & Winters, W.J.

Formation of natural gas hydrates in marine sediments 1. Conceptual model of gas hydrate growth conditioned by host sediment properties

1999

Journal of Geophysical Research-Solid Earth
Vol. 104(B10), pp. 22985-23003 

article

 

Haeckel, M., Boudreau, B.P. & Wallmann, K.

Bubble-induced porewater mixing: A 3-D model for deep porewater irrigation

2007

Geochimica et Cosmochimica Acta
Vol. 71, pp. 5135–5154 

article

DOI  

Haeckel, M., Suess, E., Wallmann, K. & Rickert, D.

Rising methane gas bubbles form massive hydrate layers at the seafloor

2004

Geochimica Et Cosmochimica Acta
Vol. 68(21), pp. 4335-4345 

article

DOI  

Hensen, C. & Wallmann, K.

Methane formation at Costa Rica continental margin - constraints for gas hydrate inventories and cross-decollement fluid flow

2005

Earth and Planetary Science Letters
Vol. 236(1-2), pp. 41-60 

article

DOI  

Luff, R. & Wallmann, K.

Fluid flow, methane fluxes, carbonate precipitation and biogeochemical turnover in gas hydrate-bearing sediments at Hydrate Ridge, Cascadia Margin: Numerical modeling and mass balances

2003

Geochimica Et Cosmochimica Acta
Vol. 67(18), pp. 3403-3421 

article

DOI  

Milkov, A.V.

Molecular and stable isotope compositions of natural gas hydrates: A revised global dataset and basic interpretations in the context of geological settings

2005

Organic Geochemistry
Vol. 36(5), pp. 681-702 

article

DOI  

Schmidt, M., Hensen, C., Morz, T., Muller, C., Grevemeyer, I., Wallmann, K., Mau, S. & Kaul, N.

Methane hydrate accumulation in "Mound 11" mud volcano, Costa Rica forearc

2005

Marine Geology
Vol. 216(1-2), pp. 83-100 

article

DOI  

Sloan, E.D.J. & Koh, C.

Clathrate hydrates of natural gases

2008

, pp. 537-628 

inbook

URL 

Tishchenko, P., Hensen, C., Wallmann, K. & Wong, C.S.

Calculation of the stability and solubility of methane hydrate in seawater

2005

Chemical Geology
Vol. 219(1-4), pp. 37-52 

article

DOI  

Torres, M.E., Wallmann, K., Trehu, A.M., Bohrmann, G., Borowski, W.S. & Tomaru, H.

Gas hydrate growth, methane transport, and chloride enrichment at the southern summit of Hydrate Ridge, Cascadia margin off Oregon

2004

Earth and Planetary Science Letters
Vol. 226(1-2), pp. 225-241 

article

DOI  

Tréhu, A., Torres, M., Bohrmann, G. & Colwell, F.

Leg 204 synthesis: Gas hydrate distribution and dynamics in the central Cascadia accretionary complex.

2006

Proceedings of the Ocean Drilling Program, Scientific Results, pp. 1-41 

incollection

DOI  

Wallmann, K., Aloisi, G., Haeckel, M., Obzhirov, A., Pavlova, G. & Tishchenko, P.

Kinetics of organic matter degradation, microbial methane generation, and gas hydrate formation in anoxic marine sediments

2006

Geochimica Et Cosmochimica Acta
Vol. 70(15), pp. 3905-3927 

article

DOI  

Wellsbury, P., Goodman, K., Barth, T., Cragg, B.A., Barnes, S.P. & Parkes, R.J.

Deep marine biosphere fuelled by increasing organic matter availability during burial and heating

1997

Nature
Vol. 388(6642), pp. 573-576 

article

URL

(Kopie 1)

Contact

GEOMAR Helmholtz-Centre for Oceanresearch Kiel

Coordination:

Dr. Christian Hensen 
Tel.: +49 431 600 2567
Tel.: +49 431 600 2916
chensen(at)ifm-geomar.de

Staff:

Prof. Dr. Klaus Wallmann
Tel: 0431-600 2287
Fax: 0431-600 2928
kwallmann(at)ifm-geomar.de

Dr. Matthias Haeckel
Tel.: +49 431 600 2123
Tel.: +49 431 600 2928
mhaeckel(at)ifm-geomar.de

Schlumberger (IES GmbH)
www.ies.de

Dr. Wolf Rottke
Dr. Thomas Hantschel