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| 延吉盆地多期不整合面的形成及其油气地质意义 | |
| 引用本文： | 张吉光,乔德武,金银姬,刘艳杰,邓传伟,丛培泓,张冬花.延吉盆地多期不整合面的形成及其油气地质意义[J].吉林大学学报(地球科学版),2013,43(6):1772. |
| 作者姓名： | 张吉光 乔德武 金银姬 刘艳杰 邓传伟 丛培泓 张冬花 |
| 作者单位： | 1.大庆油田有限责任公司勘探分公司，黑龙江 大庆163453; 2.国土资源部油气资源战略研究中心，北京100034; 3.大庆钻探工程公司地球物理勘探一公司，黑龙江 大庆163357 |
| 基金项目： | 全国油气资源战略选区调查与评价国家专项 |
| 摘 要： | 延吉盆地是一个后期改造较为强烈的断陷盆地。应用地震、地质、测井资料识别出延吉盆地中存在6个较大的不整合面，它们以角度不整合和超覆不整合2种类型为主。分析认为,燕山Ⅰ、Ⅱ幕运动形成了盆地雏形,燕山Ⅳ幕运动则使盆地回返，此期出现大量高岭石（40%），表明其与大气水淋滤等有关。短暂沉降后（龙井组）,燕山运动晚期（Ⅴ幕）发生的又一次大规模以南北挤压为主的构造运动,导致南北两翼抬起幅度巨大，剥蚀厚度超过700 m，盆地中部剥蚀厚度大约为300 m。不整合面是划分三大构造层（前断陷期、断陷期、坳陷期）的依据。其早白垩世铜佛寺组和大砬子组间的整合关系利于油气的生成。不整合面既可改善储集体的渗透性，又是形成油气二次运移的良好通道。初步预测与不整合有关的油气藏（侵蚀残丘、地层超覆不整合、断层坡折）可作为下一步勘探的目标。 |
| 关 键 词： | 延吉盆地 多期不整合 构造层 油气 |
| 收稿时间： | 2012-12-10 |
Multi-Unconformity Stage and Its Oil-Gas Geological Significance in Yanji Basin |
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| Zhang Jiguang,Qiao Dewu,Jin Yinji,Liu Yanjie,Deng Chuanwei,Cong Peihong,Zhang Donghua.Multi-Unconformity Stage and Its Oil-Gas Geological Significance in Yanji Basin[J].Journal of Jilin Unviersity:Earth Science Edition,2013,43(6):1772. | |
| Authors: | Zhang Jiguang Qiao Dewu Jin Yinji Liu Yanjie Deng Chuanwei Cong Peihong Zhang Donghua |
| Institution: | 1.Exploration Company of Daqing Oilfield Limited Company, Daqing163453,Heilongjiang,China; 2.Strategic Research Center of Oil & Gas Resources, Ministry of Land and Resources, Beijing100034, China; 3.No.1 Geophysical Exploration Company of Daqing Drilling & Exploration Corporation, Daqing163357, Heilongjiang, China |
| Abstract: | Yanji Basin is a rift basin with strong rework. Six regional unconformities which are mainly angular unconformity and overlap unconformity were identified by seismic, geological and logging data. The prototype of basin was formed by the stage Ⅰ, Ⅱof Yanshanian and the inversion stage of the basin was the stage of Ⅳ of Yanshanian. During this period，the abundant kaolinite (40%) are related to the meteoric water eluviation. After temporary subsidence stage, N-S compression during the stage Ⅴ of Yanshanian made this area suffer strong denudation. This compression led to a large height of uplift in north and south. The erosion thickness in north and south is more than 700 m while it is about 300 m in the center of the basin. The division of three tectonic sequences is based on the unconformity. The conformity between Tongfosi and Dalazi Formations is preferential for hydrocarbon generation during the Early Cretaceous. It can not only improve the permeability of reservoir but also supply the pathways of petroleum secondary migration. The oil/gas reservoirs（eroding monadnock, overlap unconformity, slope break area of fault) related to the unconformity are the favorable exploration target in future. |
| Keywords: | Yanji basin multi-stage unconformity structural stage oil and gas |
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