全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

深拖曳多道地震系统在北Cascadia边缘陆坡天然气水合物勘探中的应用

, PP. 331-342

Keywords: 深拖曳地震系统,北Cascadia边缘陆坡,海洋天然气水合物,碳酸盐丘,冷泉

Full-Text   Cite this paper   Add to My Lib

Abstract:

?深拖曳多道地震勘探系统(DTAGS)由声学和地球物理阵列组成,具有220~820Hz的激发震源,一般拖曳于海底之上300m左右的高度.DTAGS系统具有低于6m的勘探波长,比传统地震勘探更小的第一菲涅尔带半径和更大的波数采样空间,因此能够提供高分辨率的海底沉积和构造信息.由于高频扫描和深海拖曳的特殊性,DTAGS震源和水听器相对位置的精确定位是后续地震成像和速度分析的基础,因此DTAGS勘探数据处理质量的关键在于其阵列几何形态的反演.在北Cascadia边缘陆坡天然气水合物勘探的实际应用中,DTAGS系统显示了与低温流体汇集和水合物相关的Cucumber碳酸盐丘和Bullesye冷泉构造在横向和纵向上(海底300~400m深度范围内)的高分辨率沉积和构造特征,为评价水合物的资源状况,研究海底低温热液的运移和汇聚模式,及其对天然气水合物形成和分布的控制机制,提供了丰富的信息.

References

[1]  13 Spence G, Coffin R, Hoehne J. VENTFLUX2: Report of PGC01-03, C. C. G. Vessel John P. Tully, 23 July-12 August 2001. University of Victoria, 2002
[2]  14 Gettrust J, Chapman R, Walia R, et al. High resolution seismic studies of deep sea gas hydrate using the DTAGS deep towed multichannel system. EOS Trans Ame Geophys Union, 1999, 80: 439-440??
[3]  15 Walia R, Hannay D. Source and receiver geometry corrections for deep towed multichannel seismic data. Geophys Res Lett, 1999, 26:1993-1996??
[4]  16 Rowe M M, Gettrust J F. Fine structure of methane hydratebearing sediments on the Blake Outer Ridge as determined from deep-tow multichannel seismic data. J Geophys Res, 1993, 98: 463-473??
[5]  17 He T, Spence G D, Riedel M, et al. Fluid flow and origin of a carbonate mound offshore Vancouver Island: Seismic and heat flow constraints. Mar Geol, 2007, 239: 83-98??
[6]  18 Gorman A R, Holbrook W S, Hornbach M J, et al. Migration of methane gas through the hydrate stability zone in a low-flux hydrate province. Geology, 2002, 30: 327-330??
[7]  1 Collett T S. Resource potential of marine and permafrost associated gas hydrates. In: Max M D, Pallenbarg R E, Rath B B, eds. Oceanic Gas Hydrate: Guidance for Research and Programmatic Development at the Naval Research Laboratory. Proceedings of the Workshop on Naval Research Laboratory Gas Hydrate Research Program, NRL/MR/6100-97-8124. Washiongton DC: Naval Research Laboratory, 1997. 24-33
[8]  2 Kvenvolden K A. Methene hydrate--A major reservoir of carbon in shallow geosphere. Chem Geol, 1988, 71: 41-51??
[9]  3 Kvenvolden K A. Gas hydrates as a potential energy resource—A review of their methane content. In: Howell D G, ed. The Future of Energy Gases—U.S. Geological Survey Professional Paper 1570, 1993. 555-561
[10]  4 Shine K P, Derwent, R G, Wuebbles, D J, et al. Radiative forcing of climate. In: Houghton J, Jenkins G J, Ephraums J J, eds. Climate Change—The IPCC Scientific Assessment. New York: Cambridge University Press, 1990. 41-68
[11]  5 Mciver R D. Role of naturally occurring gas hydrate in sediment transport. AAPG Bull, 1982, 66: 789-792
[12]  6 Davis E E, Hyndman R D. Accretion and recent deformation of sediments along the northern Cascadia subduction zone. Geol Soc Am Bull,1989, 101: 1465-1480??
[13]  7 Hyndman R D, Spence G D. A seismic study of methane hydrate marine bottom-simulating reflectors. J Geophys Res, 1992, 97: 6683-6698??
[14]  8 Haacke R, Westbrook G, Hyndman R. Formation of the bottom-simulating reflector and its link to vertical fluid flow. In: Dallimore S R, ed. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008). Vancouver, British Columbia, Canada, 2008
[15]  9 Hyndman R D, Davis E E. A mechanism for the formation of methane hydrate and seafloor bottom-simulating reflectors by vertical fluid expulsion. J Geophys Res, 1992, 97: 7025-7041??
[16]  10 Riedel M, Collett T S, Malone M J. Proceedings of the Integrated Ocean Drilling Program, Vol. 311. Integrated Ocean Drilling Program Management International Inc, 2006
[17]  11 He T, Spence G D, Wood W T, et al. Imaging a hydrate-related cold vent offshore Vancouver Island from deep-towed multichannel seismic data. Geophysics, 2009, 74: B23-B36
[18]  12 Gettrust J F, Wood W T, Spychalski S E. High-resolution MCS in deepwater. Leading Edge, 2004, 23: 374-377??
[19]  19 Baba K, Yamada Y. BSRs and associated reflections as an indicator of gas hydrate and free gas accumulation: An example of accretionary prism and forearc basin system along the Nankai Trough, off central Japan. Resour Geol, 2004, 54: 11-24??
[20]  20 Wood W T, Gettrust J F, Chapman N R, et al. Decreased stability of methane hydrates in marine sediments owing to phase-boundary roughness. Nature, 2002, 420: 656-659??
[21]  21 Wood W T, Hart P E, Hutchinson D R, et al. Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery. Mar Petrol Geol, 2008, 25: 952-959??
[22]  22 Chapman N R, Gettrust J F, Walia R, et al. High-resolution, deep-towed, multichannel seismic survey of deep-sea gas hydrates off western Canada. Geophysics, 2002, 67: 1038-1047??

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133