冲绳海槽天然气水合物稳定带特征及资源量评价
|
摘要
根据冲绳海槽多道地震资料的处理解释,在16条地震剖面上发现了水合物似海底反射层BSR,经过AVO、波形反演等特殊的处理技术,首次直接利用BSR圈定了冲绳海槽天然气水合物的具体分布范围,直接利用数据得出了天然气水合物稳定带厚度在冲绳海槽的分布趋势,认为海槽南部最厚,中部次之,北部最薄,并通过计算得出了冲绳海槽水合物稳定带的厚度和水合物资源量,对今后海槽水合物勘查和资源量评价具有一定的指导意义。
According to the processing and interpretation of multichannel seismic reflection data in the area of Okinawa Trough,the BSR(bottom simulating reflector) are identified in 16 seismic profiles.By special processing technology such as AVO and waveform inversions,the authors,for the first time,directly used BSR to outline the distribution extent of gas hydrate in the Okinawa Trough,used the data to know the distribution tendency of thickness of gas hydrate stability zone in the Trough and thought that the largest stability zone thickness was in the south and the smallest in the north.Then through calculation the authors got the thickness of hydrate stability zone and resources of the hydrate.This would be useful to the future hydrate explorations and resource evaluations in the Okinawa Trough.
According to the processing and interpretation of multichannel seismic reflection data in the area of Okinawa Trough,the BSR(bottom simulating reflector) are identified in 16 seismic profiles.By special processing technology such as AVO and waveform inversions,the authors,for the first time,directly used BSR to outline the distribution extent of gas hydrate in the Okinawa Trough,used the data to know the distribution tendency of thickness of gas hydrate stability zone in the Trough and thought that the largest stability zone thickness was in the south and the smallest in the north.Then through calculation the authors got the thickness of hydrate stability zone and resources of the hydrate.This would be useful to the future hydrate explorations and resource evaluations in the Okinawa Trough.
引文
[1]Xu W,Rupple C.Predicting the occurrence,distribution,and e-volution of methane gas hydrate in porous marine sediments[J].J.Geo-phys.Res.,1999,104:5 081—5 096.
[2]方银霞,黎明碧,金翔龙,等.东海冲绳海槽天然气水合物的形成条件分析[J].科技通报,2003(1):1—5.[FANG Yin-xia,LIMing-bi,JIN Xiang-long,et al.The formation analysis of gashydrate in Okinawa Trough,East China Sea[J].Bulletin of Sci-ence and Technology,2003(1):1—5.]
[3]Mallick S,Lauve J,Workman R.Analysis of bottom simulatingreflector data[J].Soc.Expl.Geophys.Expanded Abstracts,1998,36—41.
[4]Ingo A,Timothy A,et al.Velocity structure of a bottom simu-lating reflector offshore Peru:Results from full waveform in-version[J].Earth and Planetary Letters,1996,139:459—469.
[5]宋海斌.海洋天然气水合物的地震反演研究展望[A].层状介质弹性参数反演研究[M].北京:高等教育出版社,2002.98—102.[SONG Hai-bin.Seismic inversion prospect of marine gashydrate[A].Inversion Research on Elastic Parameters ofStratified Media[M].Beijing:High Education Press,2002.98—102.]
[6]Yuan G D,Hyndman R D,et al.Seismic velocity studies of agas hydrate bottom-similating reflector on the northern Casca-dia continental margin:amplitude modeling and full waveforminversion[J].Journal of Geophysical Reseach,1999,104(B1):1 179—1 191.
[7]Satishs C,Timothy A M.Velocity structure of a gas hydratereflector at Ocean Drilling Programe site 889 from a globalseismic waveform inversion[J].JGR,1994,99:24 221—24233.
[8]Ganyuan Xia,Mrinal K S,Paul L.Mapping of elastic proper-ties of gas hydrates in the Carolina trough by waveform inver-sion[J].Geophysics,2000,65(3):735—744.
[9]Singh S C,Minshull T A,Spence G D.Velocity structure of agas hydrate reflector[J].Science,1993,260:204—207.
[10]Korenaga J,Holbrook W S,Singh S C,et al.Natural gas hy-drates on the southeast US margin:constraints from fullwaveform and travel time inversions of wide-angle seismic da-ta[J].J.Geophys.Res.,1997,102:15 345—15 365.
[11]Susan E M,William W S.Full waveform inversion of marinereflection data in the plane-wave domain[J].Geophysics,1997,62(2):540—553.
[12]马在田,耿建华,董良国.海洋天然气水合物的地震识别方法研究[J].海洋地质与第四纪地质,2002,22(1):1—4.[MAZai-tian,GONG Jian-hua,DONG Liang-guo.Seismic distin-guish study of marine gas hydrate[J],Marine Geology andQuaternary Geology,2002,22(1):1—4.]
[13]宋海斌,松林修.海洋天然气水合物的地球物理研究[J].地球物理学进展,2001,16(2):118—126.[SONG Hai-bin,Mat-subayashi Osamu.Geophysical researches on marine gas hy-drate[J].Progress in Geophysics,2001,16(2):118—126.]
[14]金翔龙.东海海洋地质[M].北京:海洋出版社,1992.323—330.[JIN Xiang-long.Marine Geology of East China Sea[M].Ocean Press,1992.323—330.]
[15]孟宪伟.冲绳海槽中段西陆坡下缘天然气水合物存在的可能性分析[J].沉积学报,2000,18(4):629—633.[MENG Xian-wei.Possibility of gas hydrate occurring in the western lowerslope of Mid-Okinawa Trough[J].Acta Sedimentologica Sini-ca,2000,18(4):629—633.]
[16]唐勇,金翔龙,方银霞,等.冲绳海槽天然气水合物BSR的地震研究[J].海洋学报,2003,25(4):59—66.[TANG Yong,JIN Xiang-long,FANG Yin-xia,et al.Seismic study of gashydrate BSR In Okinawa Trough[J].Acta Oceanologica Aini-ca,2003,25(4):59—66.]
[17]方银霞.冲绳海槽天然气水合物稳定带厚度的计算[J].矿床地质,2002,21(4):414—419.[FANG Yin-xia.Calculation ofgas hydrate stability zone in Okinawa Trough[J].Mineral De-posits,2002,21(4):414—419.]
[18]方银霞,黎明碧,金翔龙.海底天然气水合物稳定带的特征分析[J].海洋地质与第四纪地质,2001,21(1):103—106.[FANG Yin-xia,LI Ming-bi,JIN Xiang-long.Character anal-ysis of gas hydrate stability zone in seabed[J].Marine Geolo-gy and Quaternary Geology,2001,21(1):103—106.]
[19]Christine Ecker,Jack Dvorkin,Amos M.Estimating the a-mount of gas hydrate and free gas from marine seismic data[J].Geophysics,2000,65(2):565—573.
[20]龚建明,杨文达,卢振权,等.东海天然气水合物的区域地质特征及可能的远景区[J].海洋地质动态,2001,17(7):20—23.[GONG Jian-ming,YANG Wen-da,LU Zhen-quan,et al.Character of regional geology and possible perspective zone ofgas hydrate in East China Sea[J].Marine Geology Letters,2001,17(7):20—23.]
[2]方银霞,黎明碧,金翔龙,等.东海冲绳海槽天然气水合物的形成条件分析[J].科技通报,2003(1):1—5.[FANG Yin-xia,LIMing-bi,JIN Xiang-long,et al.The formation analysis of gashydrate in Okinawa Trough,East China Sea[J].Bulletin of Sci-ence and Technology,2003(1):1—5.]
[3]Mallick S,Lauve J,Workman R.Analysis of bottom simulatingreflector data[J].Soc.Expl.Geophys.Expanded Abstracts,1998,36—41.
[4]Ingo A,Timothy A,et al.Velocity structure of a bottom simu-lating reflector offshore Peru:Results from full waveform in-version[J].Earth and Planetary Letters,1996,139:459—469.
[5]宋海斌.海洋天然气水合物的地震反演研究展望[A].层状介质弹性参数反演研究[M].北京:高等教育出版社,2002.98—102.[SONG Hai-bin.Seismic inversion prospect of marine gashydrate[A].Inversion Research on Elastic Parameters ofStratified Media[M].Beijing:High Education Press,2002.98—102.]
[6]Yuan G D,Hyndman R D,et al.Seismic velocity studies of agas hydrate bottom-similating reflector on the northern Casca-dia continental margin:amplitude modeling and full waveforminversion[J].Journal of Geophysical Reseach,1999,104(B1):1 179—1 191.
[7]Satishs C,Timothy A M.Velocity structure of a gas hydratereflector at Ocean Drilling Programe site 889 from a globalseismic waveform inversion[J].JGR,1994,99:24 221—24233.
[8]Ganyuan Xia,Mrinal K S,Paul L.Mapping of elastic proper-ties of gas hydrates in the Carolina trough by waveform inver-sion[J].Geophysics,2000,65(3):735—744.
[9]Singh S C,Minshull T A,Spence G D.Velocity structure of agas hydrate reflector[J].Science,1993,260:204—207.
[10]Korenaga J,Holbrook W S,Singh S C,et al.Natural gas hy-drates on the southeast US margin:constraints from fullwaveform and travel time inversions of wide-angle seismic da-ta[J].J.Geophys.Res.,1997,102:15 345—15 365.
[11]Susan E M,William W S.Full waveform inversion of marinereflection data in the plane-wave domain[J].Geophysics,1997,62(2):540—553.
[12]马在田,耿建华,董良国.海洋天然气水合物的地震识别方法研究[J].海洋地质与第四纪地质,2002,22(1):1—4.[MAZai-tian,GONG Jian-hua,DONG Liang-guo.Seismic distin-guish study of marine gas hydrate[J],Marine Geology andQuaternary Geology,2002,22(1):1—4.]
[13]宋海斌,松林修.海洋天然气水合物的地球物理研究[J].地球物理学进展,2001,16(2):118—126.[SONG Hai-bin,Mat-subayashi Osamu.Geophysical researches on marine gas hy-drate[J].Progress in Geophysics,2001,16(2):118—126.]
[14]金翔龙.东海海洋地质[M].北京:海洋出版社,1992.323—330.[JIN Xiang-long.Marine Geology of East China Sea[M].Ocean Press,1992.323—330.]
[15]孟宪伟.冲绳海槽中段西陆坡下缘天然气水合物存在的可能性分析[J].沉积学报,2000,18(4):629—633.[MENG Xian-wei.Possibility of gas hydrate occurring in the western lowerslope of Mid-Okinawa Trough[J].Acta Sedimentologica Sini-ca,2000,18(4):629—633.]
[16]唐勇,金翔龙,方银霞,等.冲绳海槽天然气水合物BSR的地震研究[J].海洋学报,2003,25(4):59—66.[TANG Yong,JIN Xiang-long,FANG Yin-xia,et al.Seismic study of gashydrate BSR In Okinawa Trough[J].Acta Oceanologica Aini-ca,2003,25(4):59—66.]
[17]方银霞.冲绳海槽天然气水合物稳定带厚度的计算[J].矿床地质,2002,21(4):414—419.[FANG Yin-xia.Calculation ofgas hydrate stability zone in Okinawa Trough[J].Mineral De-posits,2002,21(4):414—419.]
[18]方银霞,黎明碧,金翔龙.海底天然气水合物稳定带的特征分析[J].海洋地质与第四纪地质,2001,21(1):103—106.[FANG Yin-xia,LI Ming-bi,JIN Xiang-long.Character anal-ysis of gas hydrate stability zone in seabed[J].Marine Geolo-gy and Quaternary Geology,2001,21(1):103—106.]
[19]Christine Ecker,Jack Dvorkin,Amos M.Estimating the a-mount of gas hydrate and free gas from marine seismic data[J].Geophysics,2000,65(2):565—573.
[20]龚建明,杨文达,卢振权,等.东海天然气水合物的区域地质特征及可能的远景区[J].海洋地质动态,2001,17(7):20—23.[GONG Jian-ming,YANG Wen-da,LU Zhen-quan,et al.Character of regional geology and possible perspective zone ofgas hydrate in East China Sea[J].Marine Geology Letters,2001,17(7):20—23.]
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心