Editorial office of ACTA PETROLEI SINICA ›› 2002, Vol. 23 ›› Issue (2): 30-33.DOI: 10.7623/syxb200202007
• Petroleum Exploration • Previous Articles Next Articles
XU Zheng-yu1
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徐政语1, 林舸1, 刘池阳2, 阎义1
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Abstract: The sequence stratigraphic units in Changtu Sag include three supersequences(SSⅠ,SSⅡ,SSⅢ),and the supersequence SSⅡcan be divided into two sequences(SⅡ1 and SⅡ2).Based on the tectonic movement and basin-filling sequence in Changtu Sag,the sequences are farther divided into lowstand system tract,expansion and contraction system tract of lake-basin.The system tracts are composed of depositional system of fan-shaped alluvium,fan-shaped delta,half-depth-lake and shallow-lake and lacurine swamp.As for an influence of episodic extension-form-basin,Changtu Sag has undergone two lake-overflow during rift-filling stage,meanwhile it filled concentrated strata of black-mudrock during forming expansion system tract of lake basin stage and it established two typical petroleum systems which are organic rock of coal-bearing series and lake-facies.
Key words: Changtu Sag, sequence stratigraphy, influence of episodic filling and forming-basin, petroleum system
摘要: 据构造活动及沉积层序充填特征分析,昌图凹陷地层层序可以划分为裂陷(SSⅠ)、断陷(SSⅡ)和坳陷(SSⅢ)3个超层序,其中SSⅡ由SⅡ1、SⅡ2两个层序构成.层序SⅡ1、SⅡ2又可细分为低位体系域、湖盆扩张体系域、湖盆收缩体系域,发育有冲积扇、扇三角洲、前扇三角洲—半深湖、浅湖—沼泽相沉积体系.由于凹陷的幕式伸展造盆作用影响,凹陷断陷充填期曾两度湖泛,相应地在湖盆扩张体系域发育期充填了两套暗色泥岩密集段,从而形成了凹陷上下叠置的阜新组(煤系烃源岩)及沙海—九佛堂组(湖相烃源岩)两个含油气系统.
关键词: 层序, 充填特征, 伸展造盆作用, 含油气系统, 昌图凹陷
CLC Number:
TE11
XU Zheng-yu. The characteristics of sequence-stratigraphy-filling and their influences on controlling petroleum system in Changtu Sag[J]. Editorial office of ACTA PETROLEI SINICA, 2002, 23(2): 30-33.
徐政语, 林舸, 刘池阳, 阎义. 昌图凹陷充填特征及其对含油气系统的控制[J]. 石油学报, 2002, 23(2): 30-33.
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