摘要
查干凹陷位于银额盆地东北角 ,依据地震、岩性、古生物、地化及测井等资料 ,其白垩系可划分出 1个一级层序、2个二级及 7个三级层序。巴音戈壁组一、二段沉积时期形成层序Ⅰ ,Ⅱ ;苏红图组沉积时期 ,形成层序Ⅲ ,Ⅳ ,Ⅴ ;银根组沉积时期形成层序Ⅵ ,Ⅶ。查干凹陷已有钻井显示 ,5 8 的油气层段分布于低位体系域中 ,30 的分布于高位体系域 ,12
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 580/0 oil and gas bearing-formation are distributed in lowstand system tracts,300/0 in highstand system tracts and 120/0 in lake ingression system tracts.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第2期166-169,182,共5页
Oil & Gas Geology
关键词
下白垩统
层序地层
隐蔽油气藏
查干凹陷
Lower Cretaceous
sequence stratigraphy
subtle reservoir
Chagan depression
