英台—大安地区坡折带对姚家组下部沉积的控制  

Controlling of slope on deposition of lower part of Yaojia Formation in Yingtai-Daan

作　　者：李强[1] 辛仁臣[2] 杨玉峰[3] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]石油大学盆地与油藏研究中心,北京昌平102249 [3]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2004年第3期17-19,共3页Petroleum Geology & Oilfield Development in Daqing

基　　金：大型坳陷湖盆坡折带的构造-古地貌-剥蚀沉积响应耦合(自然科学基金项目编号40272057)。

摘　　要：松辽盆地英台—大安地区西邻龙虎泡—大安阶地。姚家组下部沉积时期,英台大安地区西部紧邻东倾的斜坡,在地震剖面上与姚家组下部地层相当的2个反射同相轴向西超覆尖灭,反映了姚家组下部为2套向西逐层超覆的楔形体。测井、录井、岩心资料综合分析表明,下部楔形体主要为重力流沉积形成的湖底扇,上部楔形体在沉积上东、西存在差异,西侧为三角洲,东侧以湖底扇沉积为主。湖底扇主要为滑塌沉积和碎屑流沉积,少见浊流沉积。The western area of Yingtai- Daan abuts on Longhupao- Daan terrace in Songlao Basin. During the depositional period of lower part of Yaojia Formation, the western area of Yingtai- Daan abuts on eastward- dip slope,in seismic profiles there are 2 onlap reflections which are equivalent with lower part of Yaojia Formation, which indicate that there are 2 overlap wedges in lower part of Yaojia Formation.Comprehensive analysis of log and core data indicate that the lower wedge dominated by lake floor fan, but there are clear different in depositional features from east to west to the upper wedge,delta developed in west, lake floor fan in east.The lake floor fan mainly consists of slump and debris sediments, and little turbidite.

关 键 词：地层超覆 湖底扇 三角洲 姚家组 松辽盆地 

分 类 号：TE121.31[石油与天然气工程—油气勘探]