摘要
为查明辽河坳陷东部凹陷古近系有利储集相带类型和分布规律,以钻井剖面、测井曲线分析、岩心观察和粒度分析为基础,对东部凹陷古近系沉积体系进行了全面研究。确定东部凹陷西部斜坡带具备辫状河三角洲的形成条件,并确定了辫状河三角洲沉积体系发育范围和层位,识别了辫状河三角洲沉积亚相及微相。研究认为,东部凹陷古近系辫状河三角洲沉积体系与构造活动具有很好的耦合性,河流入口常位于构造传递带内,断层带常为沉积(亚)相分界,构造坡折带为碎屑沉积物有利堆积场所,辫状河三角洲前缘砂体为最有利的储集相带。
The Paleogene sedimentary system in the Eastern Sag of Liaohe Depression has been studied for favorable reservoir facies and distribution based on drilling profile, logs, core observation and grain-size analysis. It is found that the west slope in the Eastern Sag has the formation condition of braided river delta, the development area and stratigraphic position of braided river delta sedimentary system are defined, and the subfacies and microfacies are identified. The study shows that the Paleogene braided river delta system couples very well with tectonic movement, river mouth usually locates in tectonic transfer zone, fault zone usually divides sedimentary facies (or subfacies), structural break of slope is favorable place for accretion of clastic sediments, and the sand body in braided river delta front is the most favorable reservoir facies in the Eastern Sag.
出处
《特种油气藏》
CAS
CSCD
2009年第4期33-36,共4页
Special Oil & Gas Reservoirs
基金
山东省沉积成矿作用与沉积矿产重点实验室(山东科技大学)开放基金项目"陆相断陷盆地沉积充填序列与储层发育控因研究"(DMSM200803)资助
关键词
辽河坳陷
东部凹陷
古近系
辫状河三角洲
沉积体系
Liaohe Depression
Eastern Sag
Paleogene
braided river delta
sedimentary system
