THE CHARACTERS OF THE DEPOSITIONAL SYSTEMS AND SEQUENCE STRATIGRAPHY OF THE DEEP FAULTDOWN DEPRESSION IN THE LISHU DEPRESSION OF THE SONGLIAO BASIN
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摘要: 松辽盆地梨树凹陷下部为断陷构造层序,上部为拗陷构造层序。断陷构造层序由四个层序组成,包括沙河子组下、中部,营城组和登娄库组。在深部断陷中广泛发育了冲积扇-扇三角洲体系、三角洲体系和湖泊体系沉积,其中湖泊体系沉积所占比例较大,构成梨树凹陷主要的烃源岩,辫状平原型扇三角洲砂体和三角洲砂体构成深部断陷主要储集层。本文在沉积体系和成因地层格架研究基础上,阐述深部断陷的层序地层及含油气性特征。Abstract: The Lishu Depression of the Songliao Basin can be divided into a faultdown depressionstructural sequence in the lower part and a depression structural sequence in the upperpart.The faultdown depression structural sequence could consist of four sub-sequences ofthe lower and middle parts of the Shahezi Formation,the Yingcheng Formation and theDeng louku Formation.In lower part of deep faultdown depression,the alluvial fan-fandelta system,delta system and lacustrine system are widespreaded,of which lacustrinesedimentary system takes a large proportion and could be considered as the main sourcerocks of hydrocarbons in the Lishu Depression,while the plaiting plains-type fan delta sandmassif and delta sand massif could be the main reservoirs in deep faultdown depression.This paper describes the stratigraphic sequence and petroliferous characters of deep fault-down depression based on the geological studies of the depositional systems and the forma-tion of sedimentary sequences.
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[1] 马力等.松辽——一个克拉通内的复合型陆相沉积盆地.中国中新生代沉积盆地.北京:石油工业出版社,1990 [2] 李思田.断陷盆地分析与煤聚积规律.北京:地质出版社,1988 [3] Payton CE et al.Seismic Stratigraphy-Application to Hydrocarbon Exploration.AAPC.1977,Memoir 26 [4] Van Wagoner IC,Mitchum KM,and Rahmanian VD,Silicialastic Sequence stratigraphy in well logs,cores,and outcrops.AAPC.1990,(7) -
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