东营凹陷民丰地区沙三下段层序地层与沉积相研究
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摘要
地层层序的划分与对比一直是地质学研究的基础之一,基于层序地层学原理和研究方法,利用胜利油田民丰地区拉平地震剖面和测井资料进行基准面旋回的划分和对比,在此基础上对沉积相进行了研究。结果表明:该区沙三下段可划分为4个沉积旋回;其物源主要来自北部控盆断裂一侧的隆起区,并表现为近于平行的多个单点物源,但本区相邻点物源供给较充分,其各自所形成的近岸水下扇与外扇部分相接,从而在平面上呈似裙状分布;主要以近岸水下扇沉积为主,进一步可划分为扇根、扇中和扇端3个亚相。
Based on the principle of sequence stratigraphy and the research technique, the seismic profile and logging data are applied to carry out the division and comparison of base level cycles. The sedimentary facies is studied. The result shows that Es33 in the study area can be divided into four sedimentary cycles. Its provenance is mainly from the northern uplifted area, and displays in parallel multi-spot source. The source supplies of adjacent points are sufficient, and the deposits in this area are mainly nearshore subaqueous fan which can be further divided into three subfacies including fan root, mid-fan and end-fan.
Based on the principle of sequence stratigraphy and the research technique, the seismic profile and logging data are applied to carry out the division and comparison of base level cycles. The sedimentary facies is studied. The result shows that Es33 in the study area can be divided into four sedimentary cycles. Its provenance is mainly from the northern uplifted area, and displays in parallel multi-spot source. The source supplies of adjacent points are sufficient, and the deposits in this area are mainly nearshore subaqueous fan which can be further divided into three subfacies including fan root, mid-fan and end-fan.
引文
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[7]邓宏文,王红亮,李熙哲.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
[2]CrossT A,BakerM R,Chapin M A,etal.Applications of high resolution sequence stratigraphy to reservoir analysis[C]∥Eschard R,Doligez B,ed.Subsurface reservoir characterization from outcrop observation.Proceeding ofthe7th IEP Exploration and Production Research Conference,1993:11-33.
[3]CrossT A,Raynolds R G.Illustration ofcorrelation techniques,facies prediction and reservoir compartm entidentification through genetic stratigraphy,Gallup sandstone and Mesa Verde Group(Cretaceous),the Four Corners Region[G].USA:Rocky Mountain Association of Geologists 1993 Fall Field Trip,1993:45.
[4]CrossT A,LessengerM A.Sedim entvolume partitioning:Rationle forstratigraphic m odelevaluation and high-resolution stratigraphic correlation[G]∥Gradstein F M,Sandvik K O,M ilton N J,ed.Sequence stratigraphy concepts and applicatons.NPF Special Publication8,1998:171-195.
[5]CrossT A.Stratigraphic controls on reservoir attributes in continental strata[J].Earth ScienceFrontiers,2000,7(4):322-350.
[6]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.
[7]邓宏文,王红亮,李熙哲.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
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