松辽坳陷深水湖盆层序界面特征及低位域沉积模式
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摘要
白垩系青山口组到嫩江组沉积时期 ,松辽盆地为深水坳陷湖盆 ,沿长轴方向为缓坡 ,而在短轴方向为陡坡。缓坡条件下 ,三级层序界面表现为沉积相带的迁移 ,地震剖面上的超削反射终止特征不明显 ,陡坡条件下 ,三级层序界面不仅表现为沉积相带的迁移 ,而且在地震剖面上的超削反射终止特征十分明显。在层序内部均可识别出低位域、水进域和高位域。在层序的低位域 ,沿盆地长轴方向 ,三角洲水下分流河道十分发育 ,在河口的前方形成分布较广、相对较薄的河口坝、远砂坝沉积及湖底扇 ;沿短轴方向 ,三角洲水下分流河道不发育 ,而发育河口坝和远砂坝 ,向湖区方向 ,过渡为前三角洲和深湖沉积 ,在前三角洲和深湖沉积区发育大量重力流成因的湖底扇。
During the depositional stage of Cretaceous Qingshankou, Yaojia and Nenjiang Formation, Songliao basin was a depression lake with deep-water, the slope of the basin was gentle along the long-axis, and was steep along the short-axis. The migration of depositional facies is characteristics of the third-order sequence boundary in gentle slope, but the onlap and truncation in seismic profile is not clear. In the steep slope, the third-order sequence boundary displayed as migration of depositional facies, but the onlap and truncation in seismic profile is very clear. The LST, TST and HST can be recognized in the third-order sequence. Along the long-axis, the distributary channel of delta developed very well, but mouth-bar, distal-bar and lake-floor-fan sediments are thin. Along the short-axis, mouth-bar, distal-bar and lake-floor-fan sediments developed in order along the lake-direction, but lack of the sediments from distributary channel of delta.
During the depositional stage of Cretaceous Qingshankou, Yaojia and Nenjiang Formation, Songliao basin was a depression lake with deep-water, the slope of the basin was gentle along the long-axis, and was steep along the short-axis. The migration of depositional facies is characteristics of the third-order sequence boundary in gentle slope, but the onlap and truncation in seismic profile is not clear. In the steep slope, the third-order sequence boundary displayed as migration of depositional facies, but the onlap and truncation in seismic profile is very clear. The LST, TST and HST can be recognized in the third-order sequence. Along the long-axis, the distributary channel of delta developed very well, but mouth-bar, distal-bar and lake-floor-fan sediments are thin. Along the short-axis, mouth-bar, distal-bar and lake-floor-fan sediments developed in order along the lake-direction, but lack of the sediments from distributary channel of delta.
引文
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3 魏魁生,叶淑芬,郭占谦,等.松辽盆地白垩系非海相沉积层序模式.沉积学报,1996,14(4):50～60[WeiKS ,YeSF ,GuoZQ ,etal.SequencestratigraphicmodelofnonmarinesedimentsinCreta ceous,Songliaobasin.ActaSedimentologicaSinica,1996,14(4):50～60]
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8 任延广,徐宏.松辽盆地层序地层特征及含油气性.见:大庆油田勘探开发研究论文集.北京:石油工业出版社,1995.132～146[RenY ,XuH .SequencestratigraphyandhydrocarbonaccumulationsofSongliaoBasin.CellectedPapersofDaqingOilFieldExplorationandDevelopment.Beijing:PetroleumIndustryPress,1995.132～146]
9 魏魁生.非海相层序地层学—以松辽盆地为例.北京:地质出版社,1996.46～94[WeiKS .Non marinebasinSequencestratigra phy—acasestudyofSongliaoBasin.Beijing:GeologicalPublishingHouse,1996.46～94]
10 王嗣敏,刘招君,董清水,等.陆相盆地层序地层形成机制分析—以松辽盆地为例.长春科技大学学报,2000,30(2):139～144[WangSM ,LiuZJ ,DongQS ,etal.Themechanismofforma tionanalysisofcontinentalsequencestratigraphy,JournalofChangchunUniversityofScienceandTechnology,2000,30(2):139～144]
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12 LiangqingXue,GallowayWE .GeneticSequenceStratigraphicFramework,DepositionalStyle,andHydrocarbonOccurrenceoftheUpperCretaceousQYNFormationsintheSongliaoLacustrineBasin,NortheasternChina.AAPGBulletin,1993,(10):1792～1808
2 叶淑芬,魏魁生.松辽盆地白垩系的密集段及海水进侵的新证.地球科学,1996,21(3):267～271[YeSF ,WeiKS .Condensedsec tionandnewevidenceofmarineinundationinCretaceous,Songliaobasin.EarthScience,1996,21(3):267～271]
3 魏魁生,叶淑芬,郭占谦,等.松辽盆地白垩系非海相沉积层序模式.沉积学报,1996,14(4):50～60[WeiKS ,YeSF ,GuoZQ ,etal.SequencestratigraphicmodelofnonmarinesedimentsinCreta ceous,Songliaobasin.ActaSedimentologicaSinica,1996,14(4):50～60]
4 高瑞祺,蔡希源.松辽盆地油气田形成条件与分布规律.北京:石油工业出版社,1997.47～103[GaoRQ ,CaiXY .TheformationconditionsanddistributionofoilandgaspoolsofSongliaobasin.Bei jing:PetroleumIndustryPress,1997.47～103]
5 蔡希源,陈章明,王玉华,等.松辽两江地区石油地质特征分析.北京:石油工业出版社,1999.35～56[CaiXY ,ChenZM ,WangYH ,etal.Analysisofpetroleum geologiccharacteristicsofLiangjiangareainSongliaobasin.Beijing:PetroleumIndustryPress,1999.35～56]
6 WilgusCK ,HastingsBS ,KendallCG ,etal.Sea levelchanges:Anintegratedapproach.Spec.Publ.Soc.Econ.Paleont.Miner.42,1998.1～300
7 王衡鉴,曹文富.松辽盆地白垩系沉积相模式.见:杨万里主编.松辽陆相盆地石油地质.北京:石油工业出版社,1985.127～140[WangHJ ,CaoWF .SedimentologicmodelofCretaceousofSongliaobasin.In:YangWL ,eds.Petroleum geologyofSongliaocontinentalbasin.Beijing:PetroleumIndustryPress,1985.127～140]
8 任延广,徐宏.松辽盆地层序地层特征及含油气性.见:大庆油田勘探开发研究论文集.北京:石油工业出版社,1995.132～146[RenY ,XuH .SequencestratigraphyandhydrocarbonaccumulationsofSongliaoBasin.CellectedPapersofDaqingOilFieldExplorationandDevelopment.Beijing:PetroleumIndustryPress,1995.132～146]
9 魏魁生.非海相层序地层学—以松辽盆地为例.北京:地质出版社,1996.46～94[WeiKS .Non marinebasinSequencestratigra phy—acasestudyofSongliaoBasin.Beijing:GeologicalPublishingHouse,1996.46～94]
10 王嗣敏,刘招君,董清水,等.陆相盆地层序地层形成机制分析—以松辽盆地为例.长春科技大学学报,2000,30(2):139～144[WangSM ,LiuZJ ,DongQS ,etal.Themechanismofforma tionanalysisofcontinentalsequencestratigraphy,JournalofChangchunUniversityofScienceandTechnology,2000,30(2):139～144]
11 刘招君,董清水,王嗣敏,等.陆相层序地层学导论与应用.北京:石油工业出版社,2002.113～137[LiuZJ,DongQS ,WangSM ,etal.Introductiontocontinentalsequencestratigraphy&applica tion.Beijing:PetroleumIndustryPress,2002.113～137]
12 LiangqingXue,GallowayWE .GeneticSequenceStratigraphicFramework,DepositionalStyle,andHydrocarbonOccurrenceoftheUpperCretaceousQYNFormationsintheSongliaoLacustrineBasin,NortheasternChina.AAPGBulletin,1993,(10):1792～1808
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