大民屯凹陷沙四段层序地层与沉积体系研究
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摘要
利用岩性、钻井、地震及露头资料,通过对该地区进行层序地层学分析和研究,根据层序界面的识别原则,把大民屯凹陷古近系划分为1个二级层序,两个三级层序。从单井相入手,结合地震相识别出大民屯凹陷沙四段主要发育扇三角洲-湖泊沉积体系和近岸浊积扇-湖相沉积体系,主要发育扇三角洲和湖泊沉积相,局部发育近岸浊积扇。在沉积体系研究的基础上,利用地震反演预测了有利的储集砂体的发育区。
The Palaeogene strata in the Damintun depression may be divided into one second-order sequence and two third-order sequences on the basis of lithologic,well logs,outcrops and seismic data.In the fourth member of the Shahejie Formation in the Damintun depression,the depositional systems include the fan-delta to lake depositional system and the nearshore turbidite fan to lake depositional system,and the sedimentary facies types consist of the fan-delta facies,lake facies,and locally nearshore turbidite fan facies.The favourable areas for hydrocarbon accumulation are delineated by means of seismic inversion based on the research of depositional systems.
The Palaeogene strata in the Damintun depression may be divided into one second-order sequence and two third-order sequences on the basis of lithologic,well logs,outcrops and seismic data.In the fourth member of the Shahejie Formation in the Damintun depression,the depositional systems include the fan-delta to lake depositional system and the nearshore turbidite fan to lake depositional system,and the sedimentary facies types consist of the fan-delta facies,lake facies,and locally nearshore turbidite fan facies.The favourable areas for hydrocarbon accumulation are delineated by means of seismic inversion based on the research of depositional systems.
引文
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[11]孙素青,沈渭洲.2006,大民屯凹陷沙河街组四段、三段层序特征及其与油气成藏条件之间的关系[J].地球学报,57(1):57-62.
[12]朱筱敏.层序地层学[M].东营:石油大学出版社,2000.
[2]Posam entierH W,Vail P R.Eustatic controls on clastic deposi-tion I:sequence and System Tract[A].Sea Level Changes:AnIntegrated Approach[C].SEPM Special Pub lication.No.42,1988.126-148.
[3]Van W agoner J C,Posam entierHW,M itchum R M,et al..An o-verview of the fundam entals of sequence stratigraphy and key defi-n itions[A].Sea Level Changes:An Integrated Approach[C].SEPM Special Pub lication.No.42,1988.39-45.
[4]Henry W Posam entier,Pau lW eim er.S iliciclastic sequence stra-tigraphy and peotroleum geology-where to form here[J].AAPGBu lletin,1993,77(5):731-742.
[5]B ryant I D.The application ofm easurem ents to constrain reservoir-scale sequence stratigraphy models[A].H igh Resolution Se-quence Stratigraphy:Innovations and Applications[C].Geolog-ical Society Special Pub lication,1996,104:51-64.
[6]李思田,林畅松,解习农,等.大型陆相盆地地层层序学研究———以鄂尔多斯中生代盆地为例[J].地学前缘,1995,2(4):133-136.
[7]林畅松,潘元林,肖建新,等.构造坡折带——断陷盆地层序和油气预测的重要概念[J].地球科学,2000,25(3)::260-267.
[8]顾家裕.陆相盆地层序地层学概念及模式[J].石油勘探与开发,1995,22(4):6-10.
[9]邓宏文.美国层序地层研究中的新学派-高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89-97.
[10]余素玉,邬金华.层序地层学方法及其在陆相湖盆研究中的应用[J].地质科技情报,1993,12(2):37-42.
[11]孙素青,沈渭洲.2006,大民屯凹陷沙河街组四段、三段层序特征及其与油气成藏条件之间的关系[J].地球学报,57(1):57-62.
[12]朱筱敏.层序地层学[M].东营:石油大学出版社,2000.
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