Patterns of gas hydrate accumulation in mass transport deposits related to canyon activity: Example from Shenhu drilling area in the South China Sea

FU Chao; LI Shengli; YU Xinghe; LIANG Jinqiang; KUANG Zenggui; HE Yulin; JIN Lina

doi:10.1007/s13131-019-1443-1

南海北部水道活动引起的不同类型滑塌体对应的水合物赋存模式

doi: 10.1007/s13131-019-1443-1

1.
中国地质大学(北京)能源学院北京 100083
2.
国土资源部广州海洋地质调查局广东广州 510760

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出版历程
- 收稿日期: 2017-12-06

Patterns of gas hydrate accumulation in mass transport deposits related to canyon activity: Example from Shenhu drilling area in the South China Sea

1.
School of Energy Resources, China University of Geosciences, Beijing 100083, China
2.
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510760, China

摘要

摘要: 2015~2016年在神狐新钻探区钻遇大量水合物岩心，证实南海北部神狐新钻探区具有较好的水合物成藏环境和勘探前景。结合2008~2009年该区采集的地震资料，我们对晚中新世以来细粒峡谷的沉积特征及其相应的水合物成藏模式进行了分析。通过对大量地震剖面进行解释，发现该区峡谷两侧的隆起上发育大量的滑塌体。本文通过岩心粒度分析，地震相识别分析和水合物测井响应分析等手段综合识别出对水合物成藏有控制作用的三种类型的滑塌体：原生滑塌体、峡谷切割滑塌体、和同生断裂滑塌体。结合沉积速率、流体流速分析和峡谷迁移等沉积学要素对滑塌体成因进行分析，认为峡谷切割滑塌体由于后期峡谷迁移对前期滑塌体切割形成的、同生断裂滑塌体是由于隆起区基底不平引起差异性沉降而形成的。不同类型的滑塌体发育位置不同：原生滑塌体常发育在隆起中坡度较缓的区域、峡谷切割成因滑塌体常发育在不定向迁移的峡谷两侧、同生断裂滑塌体常发育在隆起中坡度起伏较大的区域。三种类型滑塌及其相应的水合物成藏模式不同，其中原生滑塌体有利于水合物成藏，而另外两种类型的滑塌体由于其不能对自由气进行有效封堵而不利于水合物成藏。根据三种滑塌体对水合物成藏的响应指出在粗粒的含有孔虫粉砂岩储层上，覆盖细粒的泥岩对自由气进行封堵有利于水合物成藏，并且多层的泥岩覆盖是造成水合物稳定带中水合物多个分层成矿现象出现的原因。
- 南海北部陆坡 /
- 水合物富集 /
- 水道特征 /
- 成因分析
Abstract: Since 2017, a plenty of gas hydrates have been drilled in a new area of Shenhu, and good heterogeneity has been found throughout the spatial distribution of the reservoir. After distinguishing different sedimentary sequence types and matching their formation with slope deposition settings, this study proposes three mass transport deposit (MTD) patterns related to canyon activity that occurred contemporaneously or epigenetically with it:well preserved MTDs, MTDs eroded by canyon migration, and MTDs dislocated by contemporaneous faults. Based on seismic reflection characteristics, this study proposed methods of quantitatively analyzing sedimentary factors, such as measuring the turbidities flow rate in the canyon, and results are interpreted with respect to canyon activity. Combining the above parameters and their relationship with gas hydrate accumulation, fine-grained seals overlapping coarse MTDs reservoirs are found to be indispensable to gas hydrate accumulation, as they prevent the release of free gas. Based on grain size data of hydrate samples from drilling wells, multi-layered gas hydrate reservoirs capped by fine-grained sediments and overlapping mud show favorable hydrate-bearing prospects. The release of gas hydrates, however, is mostly caused by the lack of mud sealing in relation to canyon activity, such as turbidities flow erosion and contemporaneous fault breaking. Canyon migration with respect to MTDs may be the actual cause of erosion of overlapping syn-sedimentary layers, and high bottom flows may contribute to an increase in the release of free gas. It is believed that contemporaneous faults caused by unstable canyon walls may break the muddy over layers and decrease the accumulation pressure of gas hydrate bearing. Thus, according to the sedimentary characteristics of MTDs and the hydrate accumulation process, three responding accumulation or releasing patterns are proposed, which respond to the different types of MTDs distinguished above:a well-preserved MTD accumulation pattern; a canyon migration eroded MTD release pattern; and a micro-contemporaneous fault dislocated MTD release pattern.
- South China Sea /
- gas hydrate /
- sedimentary characteristics /
- MTDs

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参考文献(32)

Alsop G I, Marco S, Weinberger R, et al. 2016. Sedimentary and structural controls on seismogenic slumping within mass transport deposits from the Dead Sea Basin. Sedimentary Geology, 344:71-90, doi: 10.1016/j.sedgeo.2016.02.019

Bangs N L B, Hornbach M J, Berndt C. 2011. The mechanics of intermittent methane venting at South Hydrate Ridge inferred from 4D seismic surveying. Earth and Planetary Science Letters, 310(1-2):105-112, doi: 10.1016/j.epsl.2011.06.022

Behseresht J, Bryant S L. 2012. Sedimentological control on saturation distribution in Arctic gas-hydrate-bearing sands. Earth and Planetary Science Letters, 341-344:114-127, doi: 10.1016/j.epsl.2012.06.019

Boswell R, Frye M, Shelander D, et al. 2012. Architecture of gas-hydrate-bearing sands from Walker Ridge 313, Green Canyon 955, and Alaminos Canyon 21:Northern deepwater Gulf of Mexico. Marine and Petroleum Geology, 34(1):134-149, doi: 10.1016/j.marpetgeo.2011.08.010

Chen Duanxin, Wang Xiujuan, Völker D, et al. 2016. Three dimensional seismic studies of deep-water hazard-related Features on the northern slope of South China Sea. Marine and Petroleum Geology, 77:1125-1139, doi: 10.1016/j.marpetgeo.2016.08.012

Clift P, Lin Jian, Barckhausen U. 2002. Evidence of low flexural rigidity and low viscosity lower continental crust during continental break-up in the South China Sea. Marine and Petroleum Geology, 19(8):951-970, doi: 10.1016/S0264-8172(02)00108-3

Di Celma C. 2011. Sedimentology, architecture, and depositional evolution of a coarse-grained submarine canyon fill from the Gelasian (early Pleistocene) of the Peri-Adriatic basin, Offida, central Italy. Sedimentary Geology, 238(3-4):233-253, doi: 10.1016/j.sedgeo.2011.05.003

Gong Chenglin, Wang Yingmin, Zheng Rongcai, et al. 2016. Middle Miocene reworked turbidites in the Baiyun Sag of the Pearl River Mouth Basin, northern South China Sea margin:Processes, genesis, and implications. Journal of Asian Earth Sciences, 128:116-129, doi: 10.1016/j.jseaes.2016.06.025

Han Jianhui, Xu Guoqiang, Li Yangyang, et al. 2016. Evolutionary history and controlling factors of the shelf breaks in the Pearl River Mouth Basin, northern South China Sea. Marine and Petroleum Geology, 77:179-189, doi: 10.1016/j.marpetgeo.2016.06.009

Handa Y P. 1990. Effect of hydrostatic pressure and salinity on the stability of gas hydrates. The Journal of Physical Chemistry, 94(6):2652-2657, doi: 10.1021/j100369a077

He Yunlong, Xie Xinong, Kneller B C, et al. 2013. Architecture and controlling factors of canyon fills on the shelf margin in the Qiongdongnan Basin, northern South China Sea. Marine and Petroleum Geology, 41:264-276

Holbrook W S, Hoskins H, Wood W T, et al. 1996. Methane hydrate and free gas on the Blake ridge from vertical seismic profiling. Science, 273(5283):1840-1843, doi: 10.1126/science.273.5283.1840

Horozal S, Kim G Y, Bahk J J, et al. 2015. Core and sediment physical property correlation of the second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) results in the East Sea (Japan Sea). Marine and Petroleum Geology, 59:535-562, doi: 10.1016/j.marpetgeo.2014.09.019

Jeong T, Byun J, Choi H, et al. 2014. Estimation of gas hydrate saturation in the Ulleung basin using seismic attributes and a neural network. Journal of Applied Geophysics, 106:37-49, doi: 10.1016/j.jappgeo.2014.04.006

Lee M W, Collett T S, Lewis K A. 2012. Anisotropic models to account for large borehole washouts to estimate gas hydrate saturations in the Gulf of Mexico Gas Hydrate Joint Industry Project Leg Ⅱ Alaminos Canyon 21 B well. Marine and Petroleum Geology, 34(1):85-95, doi: 10.1016/j.marpetgeo.2011.06.010

Li Gang, Yan Wen, Zhong Lifeng, et al. 2015. Provenance of heavy mineral deposits on the northwestern shelf of the South China Sea, evidence from single-mineral chemistry. Marine Geology, 363:112-124, doi: 10.1016/j.margeo.2015.01.015

Malinverno A. 2010. Marine gas hydrates in thin sand layers that soak up microbial methane. Earth and Planetary Science Letters, 292(3-4):399-408, doi: 10.1016/j.epsl.2010.02.008

Mitchum R M Jr. 1977. Seismic stratigraphy and global changes of sea level, Part 11, Glossary of terms used in Seismic Stratigraphy. In:Payton C E, ed. Seismic Stratigraphy-Applications to Hydrocarbon Exploration. USA:AAPG Memoir, 205-212

Riedel M, Bahk J J, Kim H S, et al. 2013b. Seismic facies analyses as aid in regional gas hydrate assessments. Part-I:Classification analyses. Marine and Petroleum Geology, 47:248-268

Riedel M, Collett T S, Kim H S, et al. 2013a. Large-scale depositional characteristics of the Ulleung Basin and its impact on electrical resistivity and Archie-parameters for gas hydrate saturation estimates. Marine and Petroleum Geology, 47:222-235, doi: 10.1016/j.marpetgeo.2013.03.014

Scholz N A, Riedel M, Bahk J J, et al. 2012. Mass transport deposits and gas hydrate occurrences in the Ulleung Basin, East Sea-Part 1:Mapping sedimentation patterns using seismic coherency. Marine and Petroleum Geology, 35(1):91-104, doi: 10.1016/j.marpetgeo.2012.03.004

Sha Zhibin, Liang Jinqiang, Zhang Guangxue, et al. 2015. A seepage gas hydrate system in northern South China Sea:Seismic and well log interpretations. Marine Geology, 366:69-78, doi: 10.1016/j.margeo.2015.04.006

Shi Xiaobin, Qiu Xuelin, Xia Kanyuan, et al. 2003. Characteristics of surface heat flow in the South China Sea. Journal of Asian Earth Sciences, 22(3):265-277, doi: 10.1016/S1367-9120(03)00059-2

Strozyk F, Huhn K, Strasser M, et al. 2009. New evidence for massive gravitational mass-transport deposits in the southern Cretan Sea, western Mediterranean. Marine Geology, 263(1-4):97-107, doi: 10.1016/j.margeo.2009.04.002

Vadakkepuliyambatta S, Hornbach M J, Bünz S, et al. 2015. Controls on gas hydrate system evolution in a region of active fluid flow in the SW Barents Sea. Marine and Petroleum Geology, 66:861-872, doi: 10.1016/j.marpetgeo.2015.07.023

Wang Xiujuan, Collett T S, Lee M W, et al. 2014. Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea. Marine Geology, 357:272-292, doi: 10.1016/j.margeo.2014.09.040

Wang Xiujuan, Wu Shiguo, Lee W, et al. 2011. Gas hydrate saturation from acoustic impedance and resistivity logs in the Shenhu area, South China Sea. Marine and Petroleum Geology, 28(9):1625-1633, doi: 10.1016/j.marpetgeo.2011.07.002

Wood W T, Hart P E, Hutchinson D R, et al. 2008. Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery. Marine and Petroleum Geology, 25(9):952-959, doi: 10.1016/j.marpetgeo.2008.01.015

Wu Nengyou, Zhang Haiqi, Yang Shengxiong, et al. 2011. Gas hydrate system of Shenhu Area, northern south China Sea:geochemical results. Journal of Geological Research, 2011:370298

Yu Xinghe, Wang Jianzhong, Liang Jinqiang, et al. 2014. Depositional characteristics and accumulation model of gas hydrates in northern South China Sea. Marine and Petroleum Geology, 56:74-86, doi: 10.1016/j.marpetgeo.2014.03.011

Zhang Yi, He Lijuan, Wang Jiyang, et al. 2011. Heat flow pattern, base of methane hydrates stability zones and BSRs in Shenhu Area, northern South China Sea. Acta Oceanologica Sinica, 30(1):59-67, doi: 10.1007/s13131-011-0091-x

Zhou Wei, Wang Yingmin, Gao Xianzhi, et al. 2015. Architecture, evolution history and controlling factors of the Baiyun submarine canyon system from the middle Miocene to Quaternary in the Zhujiang River Mouth Basin, northern South China Sea. Marine and Petroleum Geology, 67:389-407, doi: 10.1016/j.marpetgeo.2015.05.015

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文章访问数: 626
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南海北部水道活动引起的不同类型滑塌体对应的水合物赋存模式

doi: 10.1007/s13131-019-1443-1

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出版历程

Patterns of gas hydrate accumulation in mass transport deposits related to canyon activity: Example from Shenhu drilling area in the South China Sea

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出版历程

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