琼东南海域天然气水合物地震反射特征
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摘要
天然气水合物是一种新能源,目前,世界上许多国家都在进行天然气水合物研究。琼东南盆地是天然气水合物可能赋存的重点目标区,笔者针对琼东南海域二维地震资料进行以突出含天然气水合物地层地震反射特征为目的的处理,进一步识别含天然气水合物地层地震反射特征与分布。通过应用地震资料保幅处理技术,对该海域含天然气水合物地层地震反射特征,如似海底反射(BSR)、BSR强反射界面之上的高速异常带、BSR附近的振幅空白带、BSR的极性反转等,有了更多的认识,对开展全区含BSR特征研究有借鉴意义。
Gas hydrate is a new energy,and many countries in the world are doing research on gas hydrate.Southeast Hainan is the most important objective place on the northern slope of the South China Sea.Therefore,the research on two-dimensional seismic data in Southeast Hainan for seismic reflection characteristics of gas hydrate formation is helpful for further clarifying the relationship between distribution of gas hydrate and seismic reflection characteristics.The authors have obtained more knowledge on seismic reflection characteristics of gas hydrates in Southeast Hainan,such as bottom simulating reflector(BSR),BSR strong reflectors above the speed anomaly,BSR near amplitude blanking,BSR polarity reversal.The results achieved by the authors are of important significance for the study of BSR-containing characteristics of the whole study area.
Gas hydrate is a new energy,and many countries in the world are doing research on gas hydrate.Southeast Hainan is the most important objective place on the northern slope of the South China Sea.Therefore,the research on two-dimensional seismic data in Southeast Hainan for seismic reflection characteristics of gas hydrate formation is helpful for further clarifying the relationship between distribution of gas hydrate and seismic reflection characteristics.The authors have obtained more knowledge on seismic reflection characteristics of gas hydrates in Southeast Hainan,such as bottom simulating reflector(BSR),BSR strong reflectors above the speed anomaly,BSR near amplitude blanking,BSR polarity reversal.The results achieved by the authors are of important significance for the study of BSR-containing characteristics of the whole study area.
引文
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[16]吴志强.地震反射技术在水合物调查评价中的应用前景及设想[J].海洋地质动态,2001,17(7):30-33.
[17]甘华阳,王家生,陈建文,等.海底天然气水合物储集层饱和度的估算方法[J].物探与化探,2005,29(3):189-193.
[18]王祝文,李舟波,刘菁华.天然气水合物评价的测井相应特征[J].物探与化探,2003,27(1):13-17.
[2]岳振欢,童思友,吴志强,等.地震多参数约束下的真假BSR识别[J].海洋地质前沿,2012,28(12):60-66.
[3]刘怀山,周正云.用于研究东海天然气水合物的地震资料处理方法[J].青岛海洋大学学报:自然科学版,2002,32(3):441-448.
[4]符溪,杨木壮,文鹏飞,等.南海天然气水合物地震资料处理及其特征[J].地质科技情报,2001,20(4):33-40.
[5]王影,龚定康.东海冲绳海槽天然气水合物地震资料处理方法研究[J].海洋石油,2007,3(1):14-18.
[6]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.
[7]张光学,黄永祥,陆邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003:238-239.
[8]徐翠娥,郝小红,王影.密度双谱分析法在各向异性介质速度分析中的初步应用[J].海洋石油,2008,28(1):1-5.
[9]庄祖垠,麻志国,王志亮,等.高密度各向异性速度分析技术及应用[J].工程地球物理学报,2013,10(1):51-56.
[10]许红,刘守全,王建桥,等.国际天然气水合物调查研究现状及其主要技术构成[J].中国地质,2001,28(3):1-4.
[11]Shiply T H,Houstan M H,Buffler R T,et al.Seismic evidence for widespread possible gas hydrate horizons on continental slopes and rises[J].AAPG Bulletin,1979,63(12):2204-2213.
[12]Holbrook W S,Hoskins H,Wood W T,et al.Methane hydrate and free gas on the blake ridge from vertical seismic profiling[J].Seience,1996,273:1840-1843.
[13]Rempel A W,Buffett B A.Formation and accumulation of gas hydrate in porous media[J].Journal of Geophysical Research,1997,102(B5):10151-10164.
[14]Singh S,Minshull T A,Spence G.Velocity structure of a gas hydrate reflector[J].Science,1993,260:204-207.
[15]Hyndman R D,Spence G D.A seismic study of methane hydrate marine bottom simulating reflectors[J].Journal of Geophysical Research,1992,97(B5):6683-6698.
[16]吴志强.地震反射技术在水合物调查评价中的应用前景及设想[J].海洋地质动态,2001,17(7):30-33.
[17]甘华阳,王家生,陈建文,等.海底天然气水合物储集层饱和度的估算方法[J].物探与化探,2005,29(3):189-193.
[18]王祝文,李舟波,刘菁华.天然气水合物评价的测井相应特征[J].物探与化探,2003,27(1):13-17.
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