查干凹陷下白垩统层序地层格架与演化

doi:10.11743/ogg20020214

Abstract

Abstract:

Lower Cretaceous of Chagan depression,situated in the northwest corner of YinE basin,can be divided into one first-order sequence;two second-order sequences and seven third-order sequences according to its data of seism,lithology,palaeobiography, geochemistry and well-logging etc.Ⅰ annd Ⅱ order sequences were shaped during Ⅰ and Ⅱ member deposition of Bayin Gebi Formation,Ⅲ,Ⅳ and Ⅴ-order sequences were formed in the deposition of Suhongtu Formation while Ⅵ and Ⅶ-order sequences formed in the deposition of Yingen Formation.Well-logging data collected from Chagan depression indicate that 58% oil and gas bearing-formation are distributed in lowstand system tracts,30% in highstand system tracts and 12% in lake ingression system tracts.

Key words: Lower Cretaceous, sequence stratigraphy, subtle reservoir, Chagan depression

CLC Number:

TE121.3

Guo Yanru, Yu Junmin, Fan Tailiang. EVOLUTION AND SEQUENCE STRATIGRAPHIC FRAMEWORK OF LOWER CRETACEOUS IN CHAGAN DEPRESSION[J]. Oil & Gas Geology, 2002, 23(2): 166-169,182.

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EVOLUTION AND SEQUENCE STRATIGRAPHIC FRAMEWORK OF LOWER CRETACEOUS IN CHAGAN DEPRESSION

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