南海北部陆坡神狐海域浅地层与单道地震剖面联合解释——水合物区沉积地层特征

doi:10.11978/j.issn.1009-5470.2010.04.056

Abstract

Abstract:

The study area of this paper is the slope of the Shenhu Area in the northern South China Sea. We interpreted both sub-bottom and single-channel seismic profiles to describe the acoustic characteristics of gas hydrate sediment and to discuss the cause of its formation. We distinguished some abnormal physiognomy and geologic objects that are relevantrelative to gas hydrate in profiles. Protuberance, shallow fault, acoustic blank patch, partial enhanced reflection and acoustic blank zone were discovered in the legible sub-bottom profile. The shallow gassy belt locates under the seabed from 34 to 82m. Contrasting the sub-bottom profile with the data of China’s first gas hydrate expedition, we believed that the gas in the shallow gassy belt came from the decompounding of deeper gas hydrate. Pockmark, seepage, drape and Bottom Simulating Reflector(BSR)were recognized in the single-channel seismic profile. The depth of BSR is slightly deeper than that for the sample of China’s first gas hydrate expedition in the study area. The BSR in the seismic profile might be the bottom of gas hydrate. Based on the time-depth conversion, we plotted out Oligocene, early Miocene epoch, middle Miocene epoch and Pliocene in the seismic profile according to the sediment depth, sediment speed and age of ODP1148 and set up the chronology of the gas hydrate sediment.

Key words: north slope of South China Sea, Shenhu Sea Area, gas hydrate, sub-bottom profile, single-channel seismic profile, chronology

LI Shou-jun,CHU Feng-you,FANG Yin-xia,WU Zi-yin,NI Yu-gen. Associated interpretation of sub-bottom and single-channel seismic profiles from slope of Shenhu Area in the northern South China Sea—characteristics of gas hydrate sediment[J].Journal of Tropical Oceanography, 2010, 29(4): 56-62.

References

[1] 王海荣, 王英民, 邱燕, 等. 南海北部陆坡的地貌形态及其控制因素[J]. 海洋学报, 2008, 30(2): 70-79.
[2] 吴能友, 张海启, 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): 1-7.
[3] 陆敬安, 杨胜雄, 吴能友, 等. 南海神狐海域天然气水合物地球物理测井评价[J]. 现代地质, 2008, 22(3): 447-451.
[4] 蒋少涌, 杨涛, 薛紫晨, 等. 南海北部海区海底沉积物中孔隙中的Cl−和SO42−浓度异常特征及其对天然气水合物的指示意义[J]. 现代地质, 2005, 19(1): 45-54.
[5] 王宏斌, 张光学, 杨木壮, 等. 南海陆坡天然气水合物成藏的构造环境[J]. 海洋地质与第四纪地质, 2003, 23(1): 81-86.
[6] 何廉声. 多旋回的板块构造运动与南海新生代构造[J]. 南海地质研究, 1988, 1: 98-108.
[7] 吕文正. 南海中央海盆条带磁异常特征及构造演化[J]. 海洋学报, 1987, 9(1): 69-78.
[8] 姚伯初. 南海海盆新生代的构造演化史[J]. 海洋地质与第四纪地质, 1996, 16(2): 1-13.
[9] BRIAIS A, PATRIA T P, TAPPONNIER P. Updated interpretation of magnetic anomlies and seafloor spreading stages in the South China Sea: implications for the Tertiary tectonics of Southeast Asia[J]. Journal of Geophysical Research, 1993, 98(B4): 6299-6328.
[10] 陈忠, 颜文, 陈木宏, 等. 南海北部大陆坡冷泉碳酸盐结核的发现—海底天然气渗漏活动的新证据[J]. 科学通报, 2006, 51(9): 1065-1072.
[11] 阎贫, 刘昭蜀, 姜绍仁. 南海北部地壳的深地震地质结构探测[J]. 海洋地质与第四纪地质, 1997, 17(2): 21-27.
[12] 葛倩, 王家生, 向华, 等. 南海天然气水合物稳定带厚度及资源量估算[J]. 地球科学: 中国地质大学学报, 2006, 31(2): 245-249.
[13] 陈林, 宋海斌. 海底天然气渗漏的地球物理特征及识别方法[J]. 地球物理学进展, 2005, 20(4): 1067-1073.
[14] 陈林, 宋海斌. 海底天然气渗漏地震探测方法的研究进展[J]. 天然气工业, 2006, 26(7): 35-40.
[15] 王虑远, 徐振中, 陈世悦, 等. 天然气水合物的识别标志及研究进展[J]. 海洋通报, 2006, 25(2): 55-63.
[16] 徐华宁, 郑晓东, 张光学. 南中国海存在天然气水合物的地球物理证据[J]. 地质科技情报, 2006, 25(2): 60-63.
[17] 钱建中, 曾久岭. 地震剖面上的天然气水合物识别方法[J].海洋石油, 2002, 3: 54-59
[18] 沙志彬, 杨木壮, 梁劲, 等. 南海北部陆坡海底异常地貌特征与天然气水合物的关系[J]. 南海地质研究, 2002, 00: 29-34.
[19] XIE X, LI S, HE H, et al. Seismic evidence for fluid migration pathways from an overpressured system in the South China Sea[J]. Geofluids, 2003, 3(4): 245-253.
[20] CHEN D F, HUANG Y Y, YUAN X L, et al. Seep carbonates and preserved methane oxidizing archaea and sulfate reducing bacteria fossils suggest recent gas venting on the seafloor in the Northeastern South China Sea[J]. Marine and petroleum Geology, 2005, 22(5): 613-621.
[21] 李家彪, 高抒. 中国边缘海岩石层结构与动力过程[J]. 北京: 海洋出版社, 2003.
[22] 李家彪, 高抒. 中国边缘海海盆演化与资源效应[J]. 北京:海洋出版社, 2004.
[23] 祝有海, 张光学, 卢振权, 等. 南海天然气水合物成矿条件与找矿前景[J]. 石油学报, 2001, 22(5): 6-11.
[24] 吴时国, 姚根顺, 董冬冬, 等. 南海北部陆坡大型气田区天然气水合物的成藏地质构造特征[J]. 石油学报, 2008, 29(3): 324-328.
[25] 李守军, 陶春辉, 初凤友, 等. 浅地层剖面在富钴结壳调查研究中的应用[J]. 海洋技术, 2007, 26(1): 54-57.
[26] ZHANG H, YANG S, WU N, et al. GMGS-1 science team: China’s first gas hydrate expedition successful [J]. Methane Hydrate Newsletter: Fire in the Ice, 2007, Spring/Summer issue: 1.
[27] Guangzhou Marine Geological Survey. Deepwater Gas Hydrate Investigation, Shenhu Survey Area, South China Sea, Off Shore China(Factual Field Report)[R]. Guangzhou: Guangzhou Marine Geological Survey, 2007.
[28] 倪玉根, 郑玉龙, 李守军. 南海神狐海域上陆坡区典型浅地层剖面的初步解释[J]. 海洋学研究, 2009, 27(1): 30-36.
[29] 李前裕, 郑洪波, 钟广法, 等. 南海晚渐新世滑塌沉积指示的地质构造事件[J]. 地球科学: 中国地质大学学报, 2005, 30(1): 19-24.
[30] 邵磊, 李献华, 汪品先, 等. 南海渐新世以来构造演化的沉积记录——ODP1148站深海沉积物中的证据[J]. 地球科学进展, 2004, 19(4): 539-544.
[31] 唐松, 邵磊, 赵泉鸿. 南海渐新世以来粘土矿物的演变特征及意义[J]. 沉积学报, 2004, 22(2): 337-342.
[32] 房殿勇, 王汝建, 邵磊, 等. 南海ODP1148站深海相渐新统硅质成岩作用[J]. 海洋地质与第四纪地质, 2002, 22(2): 75-79.
[33] 董冬冬, 吴时国, 张功成, 等. 南海北部深水盆地的裂陷过程及裂陷期延迟机制探讨[J]. 科学通报, 2008, 53(19): 2342-2351.
[34] 李学杰. 南海北部陆坡水合物初步研究: ODP钻孔证据[J]. 南海地质研究, 2004: 16-28.
[35] 田军, 汪品先, 成鑫荣, 等. 南海ODP1148站中中新世 12—18Ma天文调谐的年代标尺[J]. 地球科学: 中国地质大学学报, 2005, 30(5): 513-518.
[36] 陈晓良, 赵泉鸿, 剪知湣. 南海北部ODP1148站中新世以来的碳酸盐含量变化及其古环境意义[J]. 海洋地质与第四纪地质, 2002, 22(2): 69-74.

Associated interpretation of sub-bottom and single-channel seismic profiles from slope of Shenhu Area in the northern South China Sea—characteristics of gas hydrate sediment

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