摘要
介绍了三塘湖盆地侏罗系古地理沉积背景，依据大量地质资料，叙述了辫状河三角洲岩性、结构、沉积构造及其沉积序列等沉积特征。辫状河三角洲是陆相沉积盆地中一种与油气富集密切相关的沉积类型，辫状河三角洲平原沼泽煤和碳质泥岩构成良好的烃源岩和区域性盖层。而前缘河口砂坝构成相对较好的储层，在垂向上构成自生自储组合。
The lithology,texture,sedimentary structure and sequence of Jurassic braid delta are described,and Jurassic paleogeography of Santanghu basin is introduced.Santanghu basin is an continental basin,and has a warm and hymid climate in Jurassic period.The water mass of the basin is of fresh water and brackish water.The special braid delta sedimentary system has been developed in Xishanyao formation. The braid delta consists of pebbly sandstone,coal,brown and black argillite.The scouring and filling structures and parallel bedding were developed.Hydrocarbon source rock and cap rock were formed by clay of coal and carbon in Jurassic braid delta and marshland.The braid delta is an important sedimentary type.
出处
《石油大学学报（自然科学版）》
CSCD
1998年第1期14-17,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
三角洲
沉积特征
侏罗系
三塘湖盆地
油气富集
braided river
deltaic deposit
sedimentary characteristics
Jurassic
Santanghu basin
