成都理工大学学报（自然科学版）Issue(1)：43-49,7.DOI:10.3969/j.issn.1671-9727.2015.01.06
层序地层学在秦南凹陷东南斜坡隐蔽油气藏勘探中的应用
Application of sequence stratigraphy to subtle oil and gas reservoir exploration in southeast slope of Qinnan depression of Bohai Bay,China
摘要
Abstract
This paper discusses the distribution laws and prediction methods of the subtle oil and gas reservoir in a sequence framework.Guided by the sequence stratigraphic theories,this paper studies the sequence stratigraphy features of Paleogene Dongying Formation in the southeast slope of the Qinnan depression in Bohai Bay in detail by using well drilling,logging and seismic data.Dongying Formation is divided into 3 third-order sequences,that is Sequence Dong 3 ,Sequence Dong 2 and Sequence Dong 1 .The depositional model of Sequence Dong 3 is constructed and the petroleum accumulation model of the subtle oil and gas reservoir is concluded.The research results show that in the late period of Sequence Dong 3 reservoir well developed and widely distributed with water level falling and the abundant material supplying, which can form a large-scale formation reservoir combined with the stable distribution of mudstone in Sequence Dong 2 .In the early stage,the water gradually rises and an overlap pinch-out lithologic reservoir can be formed.Below the thick mudstone of Sequence Dong 2 ,the main controlling factors of the petroleum accumulation for the subtle oil and gas reservoir are the sand distribution characteristics controlled by the change of lake level.The exploration potential is great in subtle reservoirs of the Qinnan depression.关键词
层序地层/构造-岩性复合油气藏/地层油气藏/古近系/秦南凹陷Key words
sequence stratigraphy/structure-lithology/complex reservoir/formation oil and gas reservoir/Paleogene/Qinnan depression分类
能源科技引用本文复制引用
王元君,滕玉波,石文龙,郭涛,王军,姜本厚..层序地层学在秦南凹陷东南斜坡隐蔽油气藏勘探中的应用[J].成都理工大学学报（自然科学版）,2015,(1):43-49,7.基金项目
国家科技重大专项（2008ZX05023-002）。 （）
