| 摘要: |
伊舒地堑早第三纪盆地的结构、充填形式和充填序列以及区域构造格局表明,它属于我国东北部(东部)新生代裂谷系中的一部分,其发育级别低于辽河裂谷盆地带,而优于佳伊地堑北段,为一初始裂谷盆地。该盆地经历了裂谷前隆升剥蚀(晚白垩-古新世)、张裂深陷(始新世)、充填淤积(渐新世)和后期改造(早第三纪末)四个阶段的演化。与我国东部其它新生代裂谷盆地的演化近同时同步。
地堑中5000多米厚的早第三纪陆相沉积物具有良好的生储油条件。同时地堑的构造-沉积演化决定了所形成的油气藏具有个体多而细小的特点,在有利的油气聚集区形成复式油田。 |
| 关键词: 盆地演化 裂谷盆地 盆地构式 聚油条件 |
| DOI： |
| 附件 |
| 投稿时间：1993-04-19 |
| 基金项目: |
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| TECTONO-SEDIMENTARY EVOLUTION AND OIL ACCUMULATION IN THE YISHU GRABEN,NORTHEASTERN CHINA |
| Znou Yongsheng, Wang Dongpo, Yang Bingzhong, Sun Chunyan, Guo Shaobin |
| (Changchun College of Geology) |
| Abstract: |
The study of basin geometry,filling paterns and sequences and regional tectonic framework of the Eogene basins reveals that the Yishu Graben,recognized as an incipient rift basin,is ascribed to a part of the Cenozoic rift systems in northeastern China.which is developed poorer than the Liaohe rift basin system,but better than northern Jiayi Graben.The rift basin has gone through four stages that are nearly simultaneous and synchronous with the evolution of other Cenezoie rift basins in northeastern China.They are prerifting uplift and erosion stage(Late Cretaceous to Paleocene),ex-tensional faulting and intense subsidence stage(Eocene),filling stage(Oligocene),and late reworking stage(end of Eogene).
The Eogene continental deposits 5000m and more thick in the Yishu Graben are believed to be the excellent source beds and reservoir rocks.The tectono-sedimentary evolution has created a wide range of the traps which are characterized by abundant occurrence but relatively small scale.The composite oil fields tend to be formed in the favourable locus for oil accumulation. |
| Key words: basin evolution rift basin basin geometry oil accumulation |
