苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征
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摘要
依据地震、钻测井、岩芯、古生物等资料中的层序地层特征 ,可将高邮凹陷厚达 70 0 0m的第三系—上白垩统泰州组划分为 2个一级层序 ,4个二级层序 ,11个三级层序。进而依据最大湖泛面和断裂坡折带 (首次湖泛面 )对三级层序进行了体系域划分。在 11个三级层序中识别出低位、湖侵和高位体系域的不同组合。由于汉留断层在高邮凹陷东西向上发育的程度不同 ,造成凹陷西部为双断断陷式盆地结构 ,东部为单断断箕式盆地结构 ,据此建立了高邮凹陷西部具断裂坡折带和东部无明显坡折带的层序地层样式。最后分析了层序发育的主控因素 ,认为构造和气候是高邮凹陷层序发育的主控因素。
Based on the analysis of seismic data, borehole and well-logging,core and paleontology of Tertiary and upper Cretaceous with thickness of more than 7000m in Gaoyou Sag, Subei Basin, two first-level sequences, four second-level sequences and 11 third-sequences have been identified. System tracts were also identified within each sequence based on the maximum flooding surface and fault-break(first flooding surface). Each of the 11 sequences consists of either complete lowstand, transgressive and highstand system tracts or one or two of them. Due to the different activity of Hanliu fault in the east and west part of Gaoyou sag, the west part is characterized by bi-fault subsiding basin, and the east part single-fault basin. Based on structural analysis, sequence pattern in Gaoyou sag may be described as the west part with fault-break and east without break. The main controlling factors of sequence stratigraphy was analyzed and were believed to be tectonics and climate.
Based on the analysis of seismic data, borehole and well-logging,core and paleontology of Tertiary and upper Cretaceous with thickness of more than 7000m in Gaoyou Sag, Subei Basin, two first-level sequences, four second-level sequences and 11 third-sequences have been identified. System tracts were also identified within each sequence based on the maximum flooding surface and fault-break(first flooding surface). Each of the 11 sequences consists of either complete lowstand, transgressive and highstand system tracts or one or two of them. Due to the different activity of Hanliu fault in the east and west part of Gaoyou sag, the west part is characterized by bi-fault subsiding basin, and the east part single-fault basin. Based on structural analysis, sequence pattern in Gaoyou sag may be described as the west part with fault-break and east without break. The main controlling factors of sequence stratigraphy was analyzed and were believed to be tectonics and climate.
引文
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7 胡宗全,朱筱敏.具有地形坡折带的坳陷湖盆层序地层模拟.沉积学报,2002,20(2):217～221[HuZongquan,ZhuXiaomin.Se quencestratigraphicsimulationofdepressionlakebasinwithtopo graphicramp.ActaSedimentologicaSinica,2002,20(2):217～221]
8 张善文,王英民,李群.应用坡折带理论寻找隐蔽油气藏.石油勘探与开发,2003,30(3):5～7[ZhangShanwen,WangYingmin,LiQun.Searchingsubtletrapsusingthetheoryofslopebreak.PetroleumExploration&Development,2003,30(3):5～7]
9 孙龙德.东营凹陷北部斜坡带沙三—四段砂砾岩体与油气聚集.沉积学报,2003,21(2):278～282[SunLongde,Sandstone conglomer atebodiesinSha34Membersandhydrocarbonaccumulationinnorth ernslopeofDongyingSag.ActaSedimentologicaSinica,2003,21(2):278～282]
10 VanWagonerJC ,MotchumRM ,etal.Siliciclasticsequencestratigraphyinwelllogs,cores,andoutcrops:conceptsforhighres olutioncorrelationoftimeandfacies.AAPGMethodsinExplorationSeries,1990,55:1～240
11 PosamentierHW ,VailPR .EustaticcontrolsonclasticdepositionI:sequenceandsystemtract.SEPMspecialPublication,1988,42:126～148
2 赵澄林,朱筱敏.沉积岩石学.北京:石油工业出版社,2000.33～89[ZhaoChenglin,ZhuXiaomin.Sedimentarylithology.Beijing:PetroleumIndustryPress,2000.33～89]
3 顾家裕.陆相层序地层学格架概念及模式.石油勘探与开发,1995,22(4):6～10[GuJiayu.Frameworkconceptsandmodelsofsequencestratigraphyinnonmarinepetroliferousbasin.PetroleumExploration&Development,1995,22(4):6～10]
4 顾家裕,张兴阳.油气沉积学发展回顾和应用现状.沉积学报,2003,21(1):137～141[GuJiayu,ZhangXingyang.Developmentre viewandcurrentapplicationofpetroleumsedimentology.ActaSedi mentologicaSinica,2003,21(1):137～141
5 朱筱敏,康安,王贵文.陆相坳陷型和断陷型湖盆层序地层样式探讨.沉积学报,2003,21(2):283～287[ZhuXiaomin,KangAn,WangGuiwen.Sequencestratigraphicmodelsofdepressionandfault ed downlakebasins.ActaSedimentologicaSinica,2003,21(2):283～287]
6 许淑梅,翟世奎,李三忠,等.歧口凹陷滩海区下第三系层序地层分析及沉积体系研究.沉积学报,2001,19(3):362～367[XuShumei,ZhaiShikui,LiSanzhong,etal.AnanalysisonsequencestratigraphyandsedimentarysystemofearlyNeoceneinQikousag.ActaSedimentologicaSinica,2001,19(3):362～367]
7 胡宗全,朱筱敏.具有地形坡折带的坳陷湖盆层序地层模拟.沉积学报,2002,20(2):217～221[HuZongquan,ZhuXiaomin.Se quencestratigraphicsimulationofdepressionlakebasinwithtopo graphicramp.ActaSedimentologicaSinica,2002,20(2):217～221]
8 张善文,王英民,李群.应用坡折带理论寻找隐蔽油气藏.石油勘探与开发,2003,30(3):5～7[ZhangShanwen,WangYingmin,LiQun.Searchingsubtletrapsusingthetheoryofslopebreak.PetroleumExploration&Development,2003,30(3):5～7]
9 孙龙德.东营凹陷北部斜坡带沙三—四段砂砾岩体与油气聚集.沉积学报,2003,21(2):278～282[SunLongde,Sandstone conglomer atebodiesinSha34Membersandhydrocarbonaccumulationinnorth ernslopeofDongyingSag.ActaSedimentologicaSinica,2003,21(2):278～282]
10 VanWagonerJC ,MotchumRM ,etal.Siliciclasticsequencestratigraphyinwelllogs,cores,andoutcrops:conceptsforhighres olutioncorrelationoftimeandfacies.AAPGMethodsinExplorationSeries,1990,55:1～240
11 PosamentierHW ,VailPR .EustaticcontrolsonclasticdepositionI:sequenceandsystemtract.SEPMspecialPublication,1988,42:126～148
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