摘要
根据录井、测井、岩芯等资料确定姚家组划分标志与分布情况,姚家组底界面为区域不整合面,姚一段和姚二、三段地层超覆于青二、三段地层之上,垂向上向西依次尖灭;姚一段分布范围较小,局限于研究区东侧,姚二、三段地层分布范围较大。在构造、湖平面变化、湖岸线位置、古地形和沉积体系物源供应的共同影响下,姚一段和姚二、三段沉积环境不同,所发育的沉积体系发生变化,并最终导致岩性和电性发生变化,形成分区,姚一段地层划分为分区特征明显的3个地层小区,姚二、三段地层划分为分区特征明显的4个地层小区。
The general stratigraphic division and distribution of the three members of the Yaojia Formation are clarified on the basis of well log and core data.The basic boundary of the Yaojia Formation is a regional terrestrial unconformity surface.The strata of the Member 1 and those of members 2-3 of the Yaojia Formation overlap above different horizons of the members 2 and 3 of the underlying Qingshankou Formation.They thin and eventually disappear toward the western part of the basin.The geographic distribution ...
出处
《地层学杂志》
CSCD
北大核心
2008年第3期327-332,共6页
Journal of Stratigraphy
基金
国家自然科学基金项目"大型坳陷湖盆坡折带的构造-古地貌-剥蚀沉积响应耦合"(No40272057)资助
关键词
地层划分与对比
姚家组
白垩系
松辽盆地
黑龙江省
stratigraphic division and correlation
Yaojia Formation
Cretaceous
Songliao Basin
Heilongjiang Province