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  • 1
    Online Resource
    Online Resource
    TIPTEQ-Teilvorhaben : Seismoturbidite ; fachlicher Abschlussbericht ; Projektlaufzeit: 01.01.2004 - 30.06.2005 (2005)
    Hannover : BGR
    Details Availability
    Keywords: Forschungsbericht ; Turbidit
    Type of Medium: Online Resource
    Pages: Online-Ressource (53 S., 3,02 MB) , Ill., graph. Darst., Kt.
    URL: https://edocs.tib.eu/files/e01fb06/509130801.pdf
    URL: https://doi.org/10.2314/GBV:509130801
    URL: https://edocs.tib.eu/files/e01fb06/509130801l.pdf
    DOI: 10.2314/GBV:509130801
    Language: German , English
    Note: Förderkennzeichen BMBF 03G0595A. - Literaturangaben , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Auch als gedr. Ausg. vorh , Systemvoraussetzungen: Acrobat reader. , Text überw. engl., teilw. dt.
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  • 2
    Book
    Book
    Rekonstruktion der paläozeanographischen Entwicklung des Marmarameers anhand multipler Analyseverfahren (2004)
    Details Availability
    Keywords: Hochschulschrift ; Marmarameer ; Jungpleistozän ; Paläoozeanographie ; Meeressediment ; Mikropaläontologie ; Geochemie ; Marmarameer ; Holozän ; Paläoozeanographie ; Meeressediment ; Mikropaläontologie ; Geochemie
    Type of Medium: Book
    Pages: 169 Bl , Ill., graph. Darst., Kt , 30 cm
    DDC: 550
    Language: German
    Note: Berlin, Freie Univ., Diss, 2004
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  • 3
    Online Resource
    Online Resource
    Turbidites deposited on Southern Central Chilean seamounts : evidence for energetic turbidity currents (2008)
    Associated volumes
    Details Availability
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, 251(2008), 1/2, Seite 15-31, 1872-6151
    In: volume:251
    In: year:2008
    In: number:1/2
    In: pages:15-31
    Type of Medium: Online Resource
    ISSN: 1872-6151
    DOI: 10.1016/j.margeo.2008.01.008
    Language: English
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  • 4
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    Introduction to special section: Exploration and characterization of gas hydrates (2016)
    Society of Exploration Geophysicists
    In:  Interpretation, 4 (1). SAi-SAii.
    Details
    Publication Date: 2019-02-01
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1190/INT-2016-0103-SPSEINTRO.1
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Basin-scale gas hydrate-free gas re-cycling process derived from 3D numerical modeling at the Green Canyon province, Gulf of Mexico (2016)
    In:  [Poster] In: Gordon Research Conference on Natural Gas Hydrate Systems, 28.02.-04.03.2016, Galvestone, TX, US .
    Details
    Publication Date: 2016-03-08
    Description: Gas migration pathways in the Gulf of Mexico are strongly influenced by the extensive formation and time evolution of salt canopies, welds and sheets. This multi-level salt system (known as the Louann Salt formation) deposited mostly within Callovian age (upper Middle Jurassic) and mobilized during late Miocene up to Pliocene-Pleistocene times controls the extension and direction of petroleum components migration over the entire history of the basin which, in return, has a major impact on potential gas transportation into the gas hydrate stability zone (GHSZ). In the context of gas hydrate formation, presence of extensive salt deposits tends to bend gas migration pathways from vertical (typical for the Gulf of Mexico region) towards rather horizontal and dispersed. However, amalgamation of two or more salt structures often results in re-focusing of the flow towards the local topographic subsalt heights. Together with the formation of local sediment discontinuity structures such as faults developing at the rims and tops of rootless salt deposits related to further stages of allochthonous salt mobilization, new high-permeability migration pathways develop and act as direct connection for the thermogenic gas to the GHSZ. Our study presents the 3D modeling solution quantifying and exploring the gas hydrate accumulation potential in the marine environment experiencing salt tectonics such as the Green Canyon, Gulf of Mexico. This modeling study evaluates the potential of bio- and thermogenic gas hydrate formation within Pliocene-Pleistocene reservoir layers based on full basin re-construction which accounts for depositional and transient thermal history of the basin, source rock maturation, petroleum generation, expulsion and migration, salt tectonics and associated faults development. Based on a numerical study calibrated with the existing field data, we present a new distribution pattern of gas hydrates attributed to both microbial and thermogenic origin. We present here an explanation for a formation mechanism of large gas hydrate amounts (〉 70 vol. %) wide-spread at the base of the stability zone as a result of the gas hydrate-free gas recycling process enhanced by very high Neogene sedimentation rates in the region. We suggest that the rapid development of secondary intra-salt mini-basins situated on top of the allochthonous salt deposits and following sediment subsidence caused a consequent dislocation of the GHSZ lower boundary and led to efficient gas hydrate dissociation process followed by a free gas re-charge into the GHSZ.
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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  • 6
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    3D basin-scale modeling of a natural gas hydrate system at the Green Canyon, Gulf of Mexico (2016)
    In:  [Poster] In: 13. International Conference on Gas in Marine Sediments (GIMS13), 19.-22.09.2016, Tromsø, Norway .
    Details
    Publication Date: 2016-10-13
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 7
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    3-D basin-scale reconstruction of natural gas hydrate system of the Green Canyon, Gulf of Mexico (2017)
    AGU (American Geophysical Union) | Wiley
    In:  Geochemistry, Geophysics, Geosystems, 18 (5). pp. 1959-1985.
    Details
    Publication Date: 2020-02-06
    Description: Our study presents a basin-scale 3D modeling solution, quantifying and exploring gas hydrate accumulations in the marine environment around the Green Canyon (GC955) area, Gulf of Mexico. It is the first modeling study that considers the full complexity of gas hydrate formation in a natural geological system. Overall, it comprises a comprehensive basin re-construction, accounting for depositional and transient thermal history of the basin, source rock maturation, petroleum components generation, expulsion and migration, salt tectonics and associated multi-stage fault development. The resulting 3D gas hydrate distribution in the Green Canyon area is consistent with independent borehole observations. An important mechanism identified in this study and leading to high gas hydrate saturation (〉 80 vol. %) at the base of the gas hydrate stability zone (GHSZ), is the recycling of gas hydrate and free gas enhanced by high Neogene sedimentation rates in the region. Our model predicts the rapid development of secondary intra-salt mini-basins situated on top of the allochthonous salt deposits which leads to significant sediment subsidence and an ensuing dislocation of the lower GHSZ boundary. Consequently, large amounts of gas hydrates located in the deepest parts of the basin dissociate and the released free methane gas migrates upwards to recharge the GHSZ. In total, we have predicted the gas hydrate budget for the Green Canyon area that amounts to ∼3,256 Mt of gas hydrate which is equivalent to ∼340 Mt of carbon (∼7 x 1011 m3 of CH4 at STP conditions), and consists mostly of biogenic hydrates.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/2017GC006876
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  • 8
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    Gas hydrate dynamics at the Green Canyon Site, Gulf of Mexico - recovery prospects based on new 3-D modeling study (2014)
    China Geological Survey
    In:  [Paper] In: 8. International Conference on Gas Hydrates (ICGH8), 28.07.-01.08.2014, Beijing, China . Proceedings of the 8th International Conference on Gas Hydrates (ICGH8-2014), Beijing, China, 28 July - 1 August, 2014 ; T3-63 .
    Details
    Publication Date: 2019-09-23
    Description: Due to their favorable P-T conditions and organic-rich deposits, sub-seafloor sediments in the northern Gulf of Mexico are known to have a large potential for gas hydrate accumulations. The presence of gas hydrates within sediments of the Green Canyon block has been proven by various methods, incl. seismic imaging, geochemical analysis, and drilling conducted mainly as a part of Joint Industry Project (JIP) Phase II. Gas hydrates reported therein usually occur as tens up to hundreds of meters thick sections with moderate to high concentrations within a range of 50 – 70 vol. % of pore space, and hence, seem to offer a considerable natural deposit of methane gas. The main focus of this study was to explore the complex effects of a set of control- parameters responsible for hydrocarbon migration and storage within the Gas Hydrate Stability Zone (GHSZ) on the accumulation of gas hydrates. To investigate the processes of basin formation and its subsidence history, source rock maturation, hydrocarbon migration and expulsion, and to quantify the gas hydrate accumulation potential, 3-D numerical study has been conducted using PetroMod. The area of interest extends over ~14 km x 33 km and covers the edge of the Sigsbee Escarpment representing the main salt mobility front in the region. The simulation contains full depositional history of the Green Canyon block, incl. salt deposition and re-mobilization as well as its further implications for temperature field, fluids migration and sedimentary layers distribution. Methane generation has been resolved by in-situ POC degradation and deep thermogenic mobilization from two distinct hydrocarbon sources. As a result, we present a number of likely scenarios of gas hydrate formation and accumulation in the study area that have been calibrated against available data.
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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  • 9
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    Turbidites deposited on Southern Central Chilean seamounts: evidence for energetic turbidity currents (2008)
    Details
    Publication Date: 2022-02-18
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 10
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    Basin-scale gas hydrate-free gas re-cycling process derived from 3D numerical modeling at the Green Canyon province, Gulf of Mexico (2016)
    In:  [Talk] In: Gordon Research Seminar on Natural Gas Hydrate Systems, 27.-28.02.2016, Galveston, TX, US .
    Details
    Publication Date: 2016-03-08
    Description: Gas migration pathways in the Gulf of Mexico are strongly influenced by the extensive formation and time evolution of salt canopies, welds and sheets. This multi-level salt system (known as the Louann Salt formation) deposited mostly within Callovian age (upper Middle Jurassic) and mobilized during late Miocene up to Pliocene-Pleistocene times controls the extension and direction of petroleum components migration over the entire history of the basin which, in return, has a major impact on potential gas transportation into the gas hydrate stability zone (GHSZ). In the context of gas hydrate formation, presence of extensive salt deposits tends to bend gas migration pathways from vertical (typical for the Gulf of Mexico region) towards rather horizontal and dispersed. However, amalgamation of two or more salt structures often results in re-focusing of the flow towards the local topographic subsalt heights. Together with the formation of local sediment discontinuity structures such as faults developing at the rims and tops of rootless salt deposits related to further stages of allochthonous salt mobilization, new high-permeability migration pathways develop and act as direct connection for the thermogenic gas to the GHSZ. Our study presents the 3D modeling solution quantifying and exploring the gas hydrate accumulation potential in the marine environment experiencing salt tectonics such as the Green Canyon, Gulf of Mexico. This modeling study evaluates the potential of bio- and thermogenic gas hydrate formation within Pliocene-Pleistocene reservoir layers based on full basin re-construction which accounts for depositional and transient thermal history of the basin, source rock maturation, petroleum generation, expulsion and migration, salt tectonics and associated faults development. Based on a numerical study calibrated with the existing field data, we present a new distribution pattern of gas hydrates attributed to both microbial and thermogenic origin. We present here an explanation for a formation mechanism of large gas hydrate amounts (〉 70 vol. %) wide-spread at the base of the stability zone as a result of the gas hydrate-free gas recycling process enhanced by very high Neogene sedimentation rates in the region. We suggest that the rapid development of secondary intra-salt mini-basins situated on top of the allochthonous salt deposits and following sediment subsidence caused a consequent dislocation of the GHSZ lower boundary and led to efficient gas hydrate dissociation process followed by a free gas re-charge into the GHSZ.
    Type: Conference or Workshop Item , NonPeerReviewed
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