扎格罗斯前陆盆地构造样式与油气成藏规律  

STRUCTURAL STYLE OF ZAGROS FORELAND BASIN AND ITS BEARING ON OIL AND GAS ACCUMULATION

作　　者：王剑 赵汝敏 谢楠 李林涛 张翼 

机构地区：[1]中海油研究总院,北京100028

出　　处：《海洋地质与第四纪地质》2016年第2期143-151,共9页Marine Geology & Quaternary Geology

基　　金：国家科技重大专项30项目课题四(2011ZX05030-004)

摘　　要：扎格罗斯前陆盆地是由于阿拉伯板块和欧亚板块发生陆陆碰撞而形成的周缘前陆盆地。自造山带向西南方向推进可分为叠瓦冲断带、强烈褶皱带、宽缓褶皱带和前渊凹陷带4个构造单元。扎格罗斯型周缘前陆盆地具有与常规前陆盆地模式不同的构造样式,该区域前隆带和隆外凹陷不发育,褶皱变形区则分为叠瓦冲断带、强烈褶皱带和宽缓褶皱带3个部分。叠瓦冲断带和强烈褶皱带构造变形破坏强烈,不利于圈闭油气后期聚集和保存,因此较少发现油气;而宽缓褶皱带和前渊凹陷带褶皱变形较为舒缓,该区域油气富集。可见,扎格罗斯前陆盆地不同构造单元中不同的构造样式对应各异的圈闭类型。扎格罗斯前陆盆地的形成受控于陆陆碰撞引起的挤压应力,其不同单元间构造形态各异,褶皱形态等受走滑断层和滑脱地层的影响。通过对扎格罗斯前陆盆地的构造样式进行分析,对比了传统前陆盆地和扎格罗斯前陆盆地的异同,较系统地总结了扎格罗斯前陆盆地的圈闭类型和成藏模式。The Zagros folded belt is a peripheral foreland basin,which origined from the collision between the Arabian plate and Eurasian plate.The imbricated thrust zone,high folded zone,simply folded zone and foredeep are the four elements in the Zagros folded belt.There are some differences between the Zagros folded belt and the general foreland basin.The deformation in the imbricated thrust and high folded zone is strong,but smooth in simply folded and foredeep zones.Tectonic stress,strike slip and decollement are the influential factors in the Zagros folded belt.Traps are affected by the different tectonic mode.Research found that the oil and gas is easy to accumulate in the zone between simply folded and foredeep zone.Some analysis is done by this paper to summarize the geological characteristics of the Zagros folded belt.

关 键 词：周缘前陆盆地 逆冲褶皱带 构造样式 圈闭类型 油气成藏 扎格罗斯 

分 类 号：P542.2[天文地球—构造地质学]