松辽盆地层序地层特征及油气聚集规律
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摘要
根据野外露头、钻井岩心、测井和地震资料,建立松辽盆地各级层序的识别标志和层序地层格架,将松辽盆地地层划分为白垩纪裂谷盆地巨层序和第三纪裂谷盆地巨层序,并将白垩纪裂谷盆地巨层序进一步划分为3个超层序组,7个超层序和19个层序。松辽盆地构造演化经历了断陷期、坳陷期和萎缩期3个阶段,断陷湖盆与坳陷湖盆成因机制不同。因此,层序地层内部特征及充填序列有较大差别。通过对层序地层格架内各体系域生储盖层发育特征、组合规律和油气聚集规律研究认为:水退体系域是储集砂体最发育、油气资源量最多的层段,其次为低水位和水进体系域,高水位体系域含油气较差。
Based on outcrops,cores, well logs and seismic data, the identification mark and the stratigraphic sequence framework of different levels of sequence stratigraphy have been set up. Upper Cretaceous-Tertiary of Songliao Basin can be classified into Cretaceous rift basin megasequence and Tertiary rift basin megasequence. The Cretaceous rift basin megasequence can be classified into 3 supersequence sets, 7 supersequenes and 19 sequences. The tectonic evolution of Songliao Basin can be divided into three stages: fault basin, sag basin and withered basin. So the different mechanism of the fault basin and sag basin results in different sequence features and different filling series.According to the formations of source, reservoir and cover rocks and oil-gas gathering rule of each system tract in the sequence stratigraphic frame it can be concluded that RST developed the best reservoir sandbodies and enough oil-gas resource. On the other hand, LST, TST and HST were relatively poor on both aspects.
Based on outcrops,cores, well logs and seismic data, the identification mark and the stratigraphic sequence framework of different levels of sequence stratigraphy have been set up. Upper Cretaceous-Tertiary of Songliao Basin can be classified into Cretaceous rift basin megasequence and Tertiary rift basin megasequence. The Cretaceous rift basin megasequence can be classified into 3 supersequence sets, 7 supersequenes and 19 sequences. The tectonic evolution of Songliao Basin can be divided into three stages: fault basin, sag basin and withered basin. So the different mechanism of the fault basin and sag basin results in different sequence features and different filling series.According to the formations of source, reservoir and cover rocks and oil-gas gathering rule of each system tract in the sequence stratigraphic frame it can be concluded that RST developed the best reservoir sandbodies and enough oil-gas resource. On the other hand, LST, TST and HST were relatively poor on both aspects.
引文
① 刘招君 ,董清水 ,郭巍 ,等 .非海相层序地层学研究 .科研报告 , 1 998.
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[5]郭巍,刘招君,董清水.断陷湖盆层序地层格架中的油气聚集规律以松辽盆地为例[J].吉林大学学报(地球科学版),2002,32(3):233237.GUOWei,LIUZhao jun,DONGQing shui.Oilandgasgatheringruleinthesequencestratzgraphicframeoffaultdepressionlacustrinebasin———AnexamplefromSongliaoBasin[J].JournalofJilinUniversity:EarthScienceEdition,2002,32(3):233237.
[1]VanWagonerJC.Siliciclasticsequencestratigraphyinwelllogs,coroesandoutcropsiconceptsforhigh rosolutioncorrelationoftimeandfacies[M].Oklahoma:TheAmericanAssociationofProtroleumGeologists,1990.
[2]VailPR.Seismicstratigraphyinterpertationusingsequencestratigraphy,partl[A].In:Blly,ed.SeismicStratigraphyInterpretationPrecedwre;Amassocpetrolgeolatlasofsequencesrratigraphy[C].1987.
[3]刘招君,董清水,王嗣敏.陆相层序地层学导论与应用[M].北京:石油工业出版社,2003.LIUZhao jun,DONGQing shui.Introductiontocontinentalsequencestratigraphyandapplication[M].Beijing:PetroleumIndustryPress,2003.
[4]郭巍,刘招君,崔宝琛.松辽盆地西部斜坡区坳陷期层序地层发育控制因素分析[J].长春地质学院学报,1997,27(3):327332.GUOWei,LIUZhao jun,CUIBao chen.AnalysisofthecontrollingfactorsonsequencestratigraphydevelopmentindepressionperiodinwesternslopeofSongliaoBasin[J].JournalofChangchunUniversityofEarthSciences,1997,27(3):327332.
[5]郭巍,刘招君,董清水.断陷湖盆层序地层格架中的油气聚集规律以松辽盆地为例[J].吉林大学学报(地球科学版),2002,32(3):233237.GUOWei,LIUZhao jun,DONGQing shui.Oilandgasgatheringruleinthesequencestratzgraphicframeoffaultdepressionlacustrinebasin———AnexamplefromSongliaoBasin[J].JournalofJilinUniversity:EarthScienceEdition,2002,32(3):233237.
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