琼东南盆地南部隆起带丘状地震相成因讨论
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摘要
琼东南盆地南部隆起带地震剖面上梅山组普遍存在丘状反射现象,关于该丘状反射存在两种成因认识,即冲刷水道或生物礁。为了辨别梅山组丘状反射成因,分析总结了典型的水道冲刷和生物礁地震反射特征,认为两者在地震相上明显不同:冲刷水道具有典型的下切特征,常呈明显的期次性;生物礁多呈透镜状、塔状,常见上覆岩层的披覆构造。利用地震相分析技术、瞬时属性技术、地层切片技术对丘状反射体进行了识别和刻画,结合琼东南盆地梅山期构造运动的背景,认为该丘状反射为生物礁。
Meishan Formation at the uplift of the southern Qiongdongnan Basin commonly displays domal reflections on the seismic section.There are two recognitions on the genesis of the domal reflection formerly,including erosion channels and reef.In order to identify the genesis of the domal reflections,we analyzed and concluded the typical seismic reflection characteristics of channels and reef,which indicates that the two are obviously different.Erosion channels display typical down cutting feature and always shows obvious multiphase.However,reef mostly displays lenticular,tower,commonly draping structure of its overburden.By applying seismic facies analysis,instantaneous attribute and strata slice technique,the domal reflections were identified and characterized.Combined with the tectonic movement background of Meishan stage within Qiongdongnan Basin,the geology body with domal reflections is identified as reef.
Meishan Formation at the uplift of the southern Qiongdongnan Basin commonly displays domal reflections on the seismic section.There are two recognitions on the genesis of the domal reflection formerly,including erosion channels and reef.In order to identify the genesis of the domal reflections,we analyzed and concluded the typical seismic reflection characteristics of channels and reef,which indicates that the two are obviously different.Erosion channels display typical down cutting feature and always shows obvious multiphase.However,reef mostly displays lenticular,tower,commonly draping structure of its overburden.By applying seismic facies analysis,instantaneous attribute and strata slice technique,the domal reflections were identified and characterized.Combined with the tectonic movement background of Meishan stage within Qiongdongnan Basin,the geology body with domal reflections is identified as reef.
引文
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[14]Gee M J R,Gawthorpe R L,Bakke K,et al.Seismicgeomorphology and evolution of submarine channelsfrom the Angolan continental margin[J].Journal ofSedimentary Research,2007,77(5):433-446
[15]袁圣强,曹锋,吴时国,等.南海北部陆坡深水曲流水道的识别及成因[J].沉积学报,2010,28(1):68-74Yuan S Q,Cao F,Wu S G,et al.Architecture andorigin of deepwater sinuous channel on the slope ofNorthern South China Sea[J].Sedimentary Journal,2010,28(1):68-74
[2]魏喜,邓晋福,谢文彦,等.南海盆地演化对生物礁的控制及礁油气勘探潜力分析[J].地学前缘,2005,12(3):245-252Wei X,Deng J F,Xie W Y,et al.Constraints on bio-genetic reef formation during evolution of the SouthChina Sea and exploration potential analysis[J].Earth Science Frontiers,2005,12(3):245-252
[3]张永贵,宋在超,周小进,等.琼东南盆地南部中新统生物礁的识别[J].石油实验地质,2011,33(3):307-309Zhang Y G,Song Z C,Zhou X J,et al.Identification ofreef in Miocene,south of Qiongdongnan Basin[J].Pe-troleum Geology&Experiment,2011,33(3):307-309
[4]李绪宣,朱光辉.琼东南盆地断裂系统及其油气输导特征[J].中国海上油气,2005,17(1):1-7Li X X,Zhu G H.The fault system and its hydrocar-bon carrier significance in Qiongdongnan basin[J].China Offshore Oil and Gas,2005,17(1):1-7
[5]姚根顺,袁圣强,吴时国,等.琼东南盆地深水区双物源沉积模式及勘探前景[J].石油勘探与开发,2008,35(6):685-691Yao G S,Yuan S Q,Wu S G,et al.Double prove-nance depositional model and exploration prospect indeepwater area of Qiongdongnan Basin[J].Petrole-um Exploration and Development,2008,35(6):685-691
[6]Xie X N,Müller R D,Li S T,et al.Origin of anoma-lous subsidence along the northern South China Seamargin and its relationship to dynamic topography[J].Marine and Petroleum Geology,2006,23(7):745-765
[7]邱燕,王英民.南海第三纪生物礁分布与古构造和古环境[J].海洋地质与第四纪,2001,21(1):65-73Qiu Y,Wang Y M.Reefs and paleostructure and pa-leoenvironment in the south of China Sea[J].MarineGeology&Quaternary Geology,2001,21(1):65-73
[8]马玉波,吴时国,许建龙,等.琼东南盆地南部深水凹陷生物礁及碳酸盐岩台地发育模式[J].天然气地球科学,2009,20(1):119-124Ma Y B,Wu S G,Xu J L,et al.Distribution andmodel of reef and carbonate platforms in the SouthDeepwater Sag of Qiongdongnan Basin[J].NaturalGas Geoscience,2009,20(1):119-124
[9]魏喜,祝永军.南中国海构造框架和储层地质特征概述[J].特种油气藏,2004,11(4):1-6Wei X,Zhu Y J.The tectonic frame and the intro-duction of reservoir feature in the South China Sea[J].Special Oil and Gas Reservoirs,2004,11(4):1-6
[10]陶维祥,何仕斌,赵志刚,等.琼东南盆地深水区储层分布规律[J].石油实验地质,2006,28(6):554-559Tao W X,He S B,Zhao Z G,et al.The reservoir dis-tribution pattern in the deepwater area of Qiong-dongnan Basin[J].Petroleum Geology&Experi-ment,2006,28(6):554-559
[11]Clark J D,Pickering K T.Architectural elements andgrowth patterns of submarine channels:applicationto hydrocarbon exploration[J].AAPG Bulletin,1996,80(2):194-221
[12]Wynna R B,Croninb B T,Peakallc J.Sinuous deep-water channels:genesis,geometry and architecture[J].Marine and Petroleum Geology,2007,24(6/7/8/9):341-387
[13]Deptuck M E,Steffens G S,Barton M,et al.Archi-tecture and evolution of upper fan channel-belts onthe Niger Delta slope and in the Arabian Sea[J].Marine and Petroleum Geology,2003,20(6):649-676
[14]Gee M J R,Gawthorpe R L,Bakke K,et al.Seismicgeomorphology and evolution of submarine channelsfrom the Angolan continental margin[J].Journal ofSedimentary Research,2007,77(5):433-446
[15]袁圣强,曹锋,吴时国,等.南海北部陆坡深水曲流水道的识别及成因[J].沉积学报,2010,28(1):68-74Yuan S Q,Cao F,Wu S G,et al.Architecture andorigin of deepwater sinuous channel on the slope ofNorthern South China Sea[J].Sedimentary Journal,2010,28(1):68-74
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