试论天然气水合物成藏系统

摘要/Abstract

摘要：

针对天然气水合物理论预测和实际产出的不一致性、各种标志或异常未与天然气水合物建立起严格的对应关系、世界范围内已知或由BSR等间接指标所指示的天然气水合物在垂直方向和水平方向上分布的不确定性，如何更好地从地质系统论角度研究天然气水合物成藏过程和分布规律，尝试提出天然气水合物成藏系统概念，分别从烃类生成体系、流体运移体系、成藏富集体系对天然气水合物成藏过程进行了初步探讨；同时运用此思路对世界上调查研究程度较高的分布区开展了天然气水合物成藏系统初步分析。

关键词: 天然气水合物, 成藏系统, 烃类生成体系, 成藏富集体系

Abstract:

In consideration of the discrepancy between gas hydrate theoretical prediction and its real occurrence, the inconsistent relationship between gas hydrate indicator and its existence, the irregular gas hydrate distribution law(vertically and horizontally)indicated by drilling and indirect evidence such as BSR around the world, how to strengthen studies on gas hydrate formation process and its distribution law seems practically significant in geological view. This paper attempts to bring forward the concept of gas hydrate geological system，which contains three components of gaseous hydrocarbon source subsystem, gas-bearing fluid migration sub-system and gas hydrate reservoir accumulation sub-system. In the meanwhile,some key gas hydrate geological systems are preliminarily summarized based on worldwide typical gas hydrate occurrences.

Key words: gas hydrate, geological system, gaseous hydrocarbon source sub-system, gas-bearing fluid migration sub-system, gas hydrate reservoir accumulation subsystem

中图分类号:

P744.4
TE122

卢振权,吴能友,陈建文,龚建明,吴必豪. 试论天然气水合物成藏系统[J]. 现代地质, 2008, 22(3): 363-375.

LU Zhen-quan, WU Neng-you, CHEN Jian-wen,GONG Jian-ming, WU Bi-hao. Preliminary Discussion on Gas Hydrate Geological System[J]. Geoscience, 2008, 22(3): 363-375.

参考文献

[1]Dickens G R. Rethinking the global carbon cycle with a large, dynamic and microbially mediated gas hydrate capacitor[J]. Earth and Planetary Science Letters, 2003，213:169-183.

[2]Holbrook W S. Seismic studies of the Blake Ridge: implications for gas hydrate distribution, methane expulsion, and free gas dynamics[M]//Paull C K, Dillon W P. Natural Gas Hydrates: Occurrence, Distribution, and Detection, Geophysical Monograph 124. Washing D C: American Geophysical Union, 2001:235-256.

[3]Tréhu A M, Bohrmann G, Rack F R, et al. Proceedings of the Ocean Drilling Program, Initial Reports，204 [CDROM]. College Station,Texas: Texas A & M University(Ocean Drilling Program),2003. 

[4]Bunz S, Mienert J, Berndt C. Geological controls on the Storegga gashydrate system of the midNorweigian continental margin[J]. Earth and Planetary Science Letters, 2003,209: 291-307.

[5]苏新. 海洋天然气水合物分布与“气-水-沉积物”动态体系——大洋钻探204航次调查初步结果的启示[J]. 中国科学(D辑)，2004，34(12)：1091-1099.

[6]陈多福，苏正，冯东，等. 海底天然气渗漏系统水合物成藏过程及控制因素[J]. 热带海洋学报，2005，24(3)：38-46.

[7]樊栓狮，刘锋，陈多福. 海洋天然气水合物的形成机理探讨[J]. 天然气地球科学，2004，15(5)：524-530.

[8]Lu Z, Sultan N. Empirical expressions for the gas hydrate stability law, its fraction and the layer density at temperatures 273.15K to 290.15K[J]. Geochemical Journal,2008,42(2):163-175.

[9]卢振权, Nabil Sultan, 金春爽, 等. 天然气水合物形成条件与含量影响因素的半定量分析[J]. 地球物理学报，2008，51(2)：125-132.

[10]龚再升，李思田，谢泰俊，等. 南海北部大陆边缘盆地分析与油气聚集[M]. 北京：科学出版社，1997：364-442.

[11]Xu W, Ruppel C. Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments[J].Journal of Geophysical Research,1999，104 (B3):5081-5095.

[12]Milkov A V, Claypool G, Lee Y J, et al. Gas hydrate systems at Hydrate Ridge offshore Oregon inferred from molecular and isotopic properties of hydratebound and void gases[J]. Geochimica et Cosmochimica Acta, 2005，69 (4): 1007-1026.

[13]吴能友，王宏斌，陆红锋，等. 地质—生物系统中的甲烷研究——德国天然气水合物研究现状综述[J].海洋地质动态，2006，22(5)：1-7.

[14]Soloviev V A, Ginsburg G D. Water segregation in the course of gas hydrate formation and accumulation in submarine gasseepage fields[J]. Marine Geology, 1997，137: 59-68.

[15]狄永军，郭正府，李凯明，等. 天然气水合物成因探讨[J]. 地球科学进展，2003，18(1)：138-143.

[16]Davie M K, Buffett B A. Sources of methane for marine gas hydrate: inferences from a comparison of observations and numerical models[J]. Earth and Planetary Science Letters,2003，206 : 51-63.

[17]Borowski W S. A review of methane and gas hydrates in the dynamic, stratified system of the Blake Ridge region, offshore southeastern North America[J]. Chemical Geology, 2004，205：311-346.

[18]Hyndman R D, Davis E E. A mechanism for the formation of methane hydrate and seafloor bottomsimulating reflectors by vertical fluid expulsion[J]. Journal of Geophysical Research,1992，97: 7025-7041.

[19]Sassen R, Losh S L, Cathles Ⅲ L, et al. Massive veinfilling gas hydrate: relation to ongoing gas migration from the deep subsurface in the Gulf of Mexico[J]. Marine and Petroleum Geology, 2001，18: 551-560.

[20]Torres M E, Wallmann K, Tréhu A M, et al. Gas hydrate growth, methane transport, and chloride enrichment at the southern summit of Hydrate Ridge, Cascadia margin off Oregon[J]. Earth and Planetary Science Letters, 2004，226: 225-241.

[21]Pecher I A, Kukowski N, Huebscher C, et al. The link between bottomsimulating reflections and methane flux into the gas hydrate stability zone – new evidence from Lima Basin, Peru Margin[J]. Earth and Planetary Science Letters, 2001，185: 343-354.

[22]Mienert J, Bünz S, Guidard S, et al. Ocean bottom seismometer investigations in the Ormen Lange area offshore midNorway provide evidence for shallow gas layers in subsurface sediments[J].Marine and Petroleum Geology, 2005，22 (1-2)〗: 287-297.

[23]Torres M E, McManus J, Hammond D E, et al. Fluid and chemical fluxes in and out of sediments hosting methane hydrate deposits on Hydrate Ridge, OR, I: Hydrological provinces[J]. Earth and Planetary Science Letters,2002, 201: 525-540.

[24]Holbrook W S, Lizarralde D, Pecher I A, et al. Escape of methane gas through sediment waves in a large methane hydrate province[J]. Geology, 2002,30 (5): 467-470.

[25]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[J]. Geology, 2002, 30 (4): 327-330.

[26]Flemings P B, Liu X, Winters W J. Critical pressure and multiphase flow in Blake Ridge gas hydrates[J]. Geology, 2003,31 (12): 1057-1060.

[27]Gering K L. Simulation of methane hydrate phenomena over geological timescales, Part I: Effect of sediment compaction rates on methane hydrate and free gas accumulations[J]. Earth and Planetary Science Letters, 2003,206: 65-81.

[28]Suess E, von Huene R, Emeis K, et al. Proceedings of the Ocean Drilling Program, Initial Results,112[R].College Station,Texas: Texas A & M University(Ocean Drilling Program), 1988. [29]Tryon M D, Brown K M, Torres M E. Fluid and chemical fluxes in and out of sediments hosting methane hydrate deposits on Hydrate Ridge, OR, II: Hydrological processes[J]. Earth and Planetary Science Letters, 2002,201: 541-557.

[30]Sassen R, Sweet S T, Milkov A V, et al. Geology and geochemistry of gas hydrates, central Gulf of Mexico continental slope[J]. Transactions of Gulf Coast Association of Geological Societies, 1999,49: 462-468.

[31]Behrmann J, Lewis S, Musgrave S, et al. Proceedings of the Ocean Drilling Program, Initial Results,141[R].College Station,Texas: Texas A & M University(Ocean Drilling Program),1992.

[32]Taira A, Hill I, Firth J, et al. Proceedings of the Ocean Drilling Program, Initial Report, 131[R].College Station,Texas: Texas A & M University(Ocean Drilling Program),1991.

[33]Milkov A V, Claypool G E, Lee Y J, et al. In situ methane concentrations at Hydrate Ridge, offshore Oregon: New constraints on the global gas hydrate inventory from an active margin[J]. Geology, 2003, 31 (10): 833-836.

[34]Fehn U, Snyder G T, Muramatsu Y. Iodine as a tracer of organic material: 129I results from gas hydrate systems and fore arc fluids[J]. Journal of Geochemical Exploration, 2007, 95:66-80.

[35]Rowe M M, Gettrust J F. Faulted structure of the bottom simulating reflector on the Blake Ridge, western North Atlantic[J]. Geology, 1993,21: 833-836.

[36]Rowe M M, Gettrust J F. Fine structure of methane hydratebearing sediments on the Blake Outer Ridge as determined from DeepTow multichannel seismic data[J]. Journal of Geophysical Research, 1993,98: 463-473.

[37]Hutchinson D R, Ruppel C D, Pohlman J, et al. An integrated geological, geophysical, and geochemical analysis of subsurface gas hydrates in the northern Gulf of Mexico.AAPG Hedberg Research Conference, Natural Gas Hydrates: Energy Resource Potential and Associated Geological Hazards, September 12-16, 2004, Vancouver, B C, Canada.

[38]BenAvraham Z, Smith G, Reshef M, et al. Gas hydrate and mud volcanoes on the southwest African continental margin off South African[J]. Geology, 2002, 30 (10): 927-930.

[39]Lu H, Wright F, Okui T, et al. Sediment control on hydrate occurrence in natural sediments-from experimental results.AAPG Hedberg Research Conference, Natural Gas Hydrates: Energy Resource Potential and Associated Geological Hazards, September 12-16, 2004, Vancouver, B C, Canada.

[40]苏新，宋成兵，方念乔. 东太平洋水合物海岭BSR以上沉积物粒度变化与气体水合物分布[J]. 地学前缘，2005，12(1)：234-242.

[41]Paull C K, Matsumoto R. Leg 164 overview[M]//Paull C K, Matsumoto R, Wallace P J, et al. Proceedings of the Ocean Drilling Program, Scientific Results. College Station,Texas: Texas A & M University(Ocean Drilling Program), 2000:3-10.

[42]Dillon W P, Paull C K. Marine gas hydrates: II. Geophysical evidence[M]//Cox J L. Natural Gas Hydrates, Properties, Occurrence, and Recovery. Woburn, Massachusetts: Butterworth Publishers,1983:73-90. 

[43]Egeberg P K. Hydrates associated with fluid flow above salt diapers (Site 996)[M]//Paull C K, Matsumoto R, Wallace P J, et al.Gas Hydrate Sampling on the Blake Ridge and Carolina Rise. Proceedings of the Ocean Drilling Program, Scientific Results,164.College Station,Texas: Texas A & M University(Ocean Drilling Program), 2000: 219-228.

[44]Taylor M H, Dillon W P, Pecher I A. Trapping and migration of methane associated with the gas hydrate stability zone at the Blake Ridge diapir: new insights from seismic data[J]. Marine Geology, 2000,164: 789-790.

[45]Van Dover C L, Aharon P, Berhard J M, et al. Blake Ridge methane seeps: characterization of a soft sediment, chemosynthetically based ecosystem[J]. Deep Sea Research, Part 1,2003, 50: 281-300.

[46]Suess E, Torres M E, Bohrmann G, et al. Gas hydrate destabilization: Enhanced dewatering, benthic material turnover and large methane plumes at the Cascadia convergent margin[J]. Earth and Planetary Science Letters, 1999,170: 1-15.

[47]Lu Z, Tomaru H, Fehn U. Iodine ages of pore waters at Hydrate Ridge(ODP Leg 204), Cascadia Margin: implications for sources of methane in gas hydrates[J].Earth and Planetary Science Letters, doi: 10.1016/j.epsl.2007.12.015.

[48]Shipboard Scientific Party. Leg 204 summary[M]//Tréhu A M, Bohrmann G, Rack F R, et al. Proceedings of the Ocean Drilling Program, Initial Results, 204. College Station,Texas: Texas A & M University(Ocean Drilling Program),2003:1-75.

[49]Tréhu A M, Long P E, Torres M E, et al. Threedimensional distribution of gas hydrate beneath southern Hydrate Ridge: constraints from ODP Leg 204[J]. Earth and Planetary Science Letters, 2004,222 : 845-862.

[50]Brooks J M, Cox H B, Bryant W R, et al. Association of gas hydrate and oil seepage in the Gulf of Mexico[J]. Organic Geochemistry, 1986,10: 221-234.

[51]Milkov A V, Sassen R. Preliminary assessment of resources and economic potential of individual gas hydrate accumulations in the Gulf of Mexico continental slope[J]. Marine and Petroleum Geology,2003,20: 111-128.

[52]Whelan J, Eglinton L, Cathles Ⅲ L, et al. Surface and subsurface manifestations of gas movement through a NS transect of the Gulf of Mexico[J]. Marine and Petroleum Geology, 2005,22: 479-497.

[53]Bouriak S, Volkonskaia A, Galaktionov V. ‘Split’strata bounded gas hydrate BSR below deposits of the Storegga Slide and at the southern edge of the Voring Plateau[J]. Marine Geology, 2003,195: 301-318.

[54]Andreassen K，Mienert J , Bryn P, et al. A double gashydrate related bottom simulating reflector at the Norwegian continental margin[J]. Annals of New York Academy of Sciences, 2000,912:126-135.

[55]Dore A G, Lundin E R. Cenozoic compressional structures on the NE Atlantic margin: Nature, origin and potential significance for hydrocarbon exploration[J]. Petroleum Geoscience, 1996,2 : 299-311.

[56]吴能友，张海啟，杨胜雄，等. 南海神狐海域天然气水合物成藏系统初探[J]. 天然气工业，2007，27(9)：1-6.