| 松辽盆地西斜坡上白垩统青山口组二段及三段底部四级层序格架下沉积微相分布 |
| |
| 引用本文： | 孙佳珺,辛仁臣,梁江平,谢莲英.松辽盆地西斜坡上白垩统青山口组二段及三段底部四级层序格架下沉积微相分布[J].古地理学报,2014,16(4):461-471. |
| |
| 作者姓名： | 孙佳珺 辛仁臣 梁江平 谢莲英 |
| |
| 作者单位： | 1.中国地质大学(北京)海洋学院,北京100083
2 中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712
3 中国石油华北油田分公司勘探开发研究院,河北任丘062552 |
| |
| 基金项目： | 国家科技重大专项“岩性地层油气藏成藏规律、关键技术及目标评价”(编号:2011ZX05001002)资助 |
| |
| 摘 要： | 综合利用地震、录井、测井、岩心资料,建立了松辽盆地西斜坡上白垩统青山口组二段及三段底部四级层序地层格架,查明了四级层序格架内沉积微相的空间分布。青山口组二段划分为2个四级层序(Cg4、Cg3),每个四级层序均可划分为湖泊扩张体系域和湖泊收缩体系域,分别命名为Eg4、Sg4,Eg3、Sg3。西斜坡青山口组二段及三段底部的沉积格局为滨浅湖沉积体(砂坝、泥滩、混合滩)和三角洲前缘沉积体(河口坝、远砂坝)共存。Eg4沉积时期发育了物源来自西部与北部的4个三角洲前缘沉积体,沉积体之间发育滨浅湖混合滩;Sg4沉积时期三角洲沉积体规模较前期扩大,并且发育了物源来自西北方向的三角洲。Eg3沉积时期物源来自西部及北部的三角洲向东推进,东北部三角洲前缘沉积体萎缩;Sg3沉积时期以三角洲前缘沉积占优势,三角洲前缘沉积体错叠连片,滨浅湖沉积大量减少。青山口组二段及三段底部自下而上,沉积区范围和三角洲前缘沉积体的规模逐渐扩大。
|
| 关 键 词： | 松辽盆地 西斜坡 青山口组 高频层序 沉积微相 |
| 收稿时间： | 2014-01-09 |
Sedimentary microfacies distribution under the 4th-order sequence stratigraphic framework of the Member 2 and lower Member 3 of Upper Cretaceous Qingshankou Formation in west slope of Songliao Basin |
| |
| Sun Jiajun,Xin Renchen,Liang Jiangping,Xie Lianying.Sedimentary microfacies distribution under the 4th-order sequence stratigraphic framework of the Member 2 and lower Member 3 of Upper Cretaceous Qingshankou Formation in west slope of Songliao Basin[J].Journal of Palaeogeography,2014,16(4):461-471. |
| |
| Authors: | Sun Jiajun Xin Renchen Liang Jiangping Xie Lianying |
| |
| Institution: | 1.School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083;2.Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,PetroChina, Daqing 163712,Heilongjiang;3.Exploration and Development Research Institute of Huabei Oilfield Company,PetroChina, Renqiu 062552,Hebei |
| |
| Abstract: | Based on seismic,logging and core data,the 4th-order sequence stratigraphic framework of the Member 2 and lower Member 3 of Upper Cretaceous Qingshankou Formation in the west slope of the Songliao Basin was established and the spatial distribution of the sedimentary microfacies under the framework of the 4th-order sequence was reconstructed. The Qingshankou Formation was divided into two 4th-order sequences(Cg4、Cg3),each of the 4th-order sequence was divided into lake expanding system tract and lake shrinking system tract,respectively named Eg4、Sg4,Eg3、Sg3 upwardly. Shore-shallow lacustrine sedimentary bodies(shore-shallow lacustrine sandy bars,mud bank and mixed bank)and delta front(mouth bars and distal bars) characterised the deposition pattern of the Member 2 and lower Member 3 of Qingshankou Formation in west slope. Delta front sedimentary bodies from the west and north were developed in the Eg4, shore-shallow lacustrine mixed beaches were developed among the sedimentary bodies of delta front. The early delta expanded and a new northwest delta was developed in Sg4. Delta from the west and north extended to the east and delta front sedimentary bodies from the southwest shrinked in Eg3. Delta front sedimentary bodies were dominant and overlapped each other, while shore-shallow lacustrine sediments reduced in Sg3. The depositional zones continued to expand,and delta front sedimentary bodies expanded in the Member 2 and lower Member 3 of Qingshankou Formation upwardly. |
| |
| Keywords: | Songliao Basin west slope Qingshankou Formation high-frequency sequence sedimentary microfacies |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
