扬马延海脊构造-沉积演化及油气潜力  

Tectonic and Sedimentary Evolution and Oil/Gas Potential in the Jan Mayen Ridge

作　　者：成林[1] 袁炳强[1] 张春灌[1] 许文强[2] 鲁海鸥 

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]金堆城钼业股份有限公司,陕西西安710077 [3]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《现代地质》2017年第3期450-459,共10页Geoscience

基　　金：中海石油(中国)有限公司海外油气勘探项目"冰岛IS2014/01区块重磁资料处理与解释"(1547-2015-EM-PS-004);西安石油大学研究生创新基金(2015cx140216)

摘　　要：扬马延海脊位于北大西洋的北极圈附近,东格陵兰板块和挪威板块之间,冰岛东北方向。北极地区地域辽阔,油气资源丰富,但是恶劣的环境一直制约油气的勘探进展。在扬马延海脊的沉积演化过程中,扬马延海脊在第三纪前有着和东格陵兰陆架、挪威陆架相似的沉积序列,其构造演化经历了二叠纪陆内裂谷、三叠纪—侏罗纪同裂谷和微陆块漂移、白垩纪至今热沉降和被动陆缘等3个阶段。结合前人研究成果,对搜集的东格陵兰陆架、挪威陆架的油气地质资料分析,认为扬马延海脊可划分为扬马延盆地、扬马延西部构造带、扬马延中部凸起带、扬马延海槽、扬马延东部斜坡、扬马延南部复杂构造带6个构造单元,在其上发育着2套油气系统。同时扬马延海脊发育有伸展构造圈闭、地垒断块圈闭、构造圈闭和地层圈闭,这些圈闭为油气的赋存提供了良好的环境,也有利于划分有利油气勘探区带。研究结果可为进一步分析扬马延海脊构造特征等方面提供基础信息,同时对我国参与研究开发北极油气资源具有重大意义。The Jan Mayen Ridge which is in the northeast of Iceland is located in the North Atlantic near the Arctic Circle, between Greenland plate and Norway plate. The Arctic region is vast with plentiful oil and gas re- sources, but the severe natural environment has limited the progress of oil and gas exploration. In the process of the sedimentary evolution of the Jan Mayen Ridge, the Jan Mayen Ridge has a similar sedimentary sequence to the East Greenland continental shelf and Norwegian continental shelf in Pre-Tertiary, and its tectonic evolution experienced three stages, i.e. a rift within the Permian, Triassic-Jurassic rift and micro-continent drift, and the Cretaceous thermal subsidence and passive margin. Through the analysis of previous researches and the oil and gas features of East Greenland continental shelf and Norwegian continental shelf the Jan Mayen Ridge can be divided into six tectonic units with two sets of oil and gas systems, i.e. the basin of the Jan Mayen, the west tectonic zone of the Jan Mayen, the central uplifted zone in the Jan Mayen, the Jan Mayen Trough, the eastern slopes of the Jan Mayen, the south complex tectonic belt of the Jan Mayen. At the same time, the tectonic evolu- tion of the Jan Mayen Ridge formed extensional tectonic traps, horst fault block traps, structural traps and strati- graphic traps, and these traps provide a good environment for the accumulation of oil and gas, and also facilitate dividing the favorable exploration zones. This study provides a help for domestic and foreign research on the Jan Mayen Ridge, and has great significance to the research and exploitation of Arctic oil and gas resources.

关 键 词：扬马延海脊 沉积演化 构造单元 构造圈闭 有利勘探区带 

分 类 号：P618.130.2[天文地球—矿床学] TE121.2[天文地球—地质学]