Abstract

Central Tunisia is characterized by major fault systems, being ornamented by salt diapirs of the Late Triassic evaporite-rich interval. Salt movement began in the Late Triassic and continues to the present-day. Lasting halokinesis create pillows, diapirs, salt wall and salt-cored folds, sometimes, with collapse graben above. Salt diapir structures have been mapped and many regions collapsed diapirs are, perhaps, associated to salt removal. These structures were eroded resulting exposure and sub-aerial erosion by the Late Cretaceous to Paleogene uplift and post-Middle Miocene. The initial studies and findings related to salt structures in Tunisia suggesting a clear correlation between diapiric uplift and local tectonic structures. In particular, the N‒S and NW‒SE shortening trends during the Neogene and Quaternary folding strongly controlled the development of rows of diapirs and salt walls. The salt activities are controlled by tectonics as well as differential loading in the Triassic sediments over long distances, displaying that the mobilization of Triassic sediments covered the whole region and not just the zones near the single diapiric structures. Here we will focus also in the salt related plays and the associated petroleum systems with particular emphasis on trap types, reservoir and hydrocarbon migration pathways. Obviously, all these elements are linked together to certain degree and controlled by the salt tectonics.

中文翻译：

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突尼斯中部倒塌斜向斜盘的地震成像

摘要

突尼斯中部的特征是主要的断层系统，其特征是晚三叠世蒸发富集层段的盐底。盐运动始于三叠纪晚期，一直持续到今天。持久的运动障碍有时会在枕头上，枕骨，盐壁和盐芯褶皱上造成塌陷。已经绘制了盐底皮生物的结构图，并且坍塌的底皮的许多区域可能与除盐有关。这些结构被白垩纪晚期至古近纪隆升和中新世后期侵蚀而导致暴露和地下侵蚀。突尼斯有关盐结构的初步研究和发现表明，底辟隆起与局部构造结构之间存在明显的相关性。尤其是，新近纪和第四纪折叠过程中N‒S和NW‒SE的缩短趋势强烈地控制了成排的底辟和盐壁的发育。盐的活动受构造和远距离的三叠纪沉积物负荷差异的控制，这表明三叠纪沉积物的动员覆盖了整个区域，而不仅仅是单个二尖瓣结构附近的区域。在这里，我们还将重点关注与盐有关的油气田和相关的石油系统，尤其是圈闭类型，储层和碳氢化合物迁移途径。显然，所有这些元素都在一定程度上联系在一起，并受到盐构造的控制。盐的活动受构造和远距离的三叠纪沉积物负荷差异的控制，这表明三叠纪沉积物的动员覆盖了整个区域，而不仅仅是单个二尖瓣结构附近的区域。在这里，我们还将重点关注与盐有关的油气田和相关的石油系统，尤其是圈闭类型，储层和碳氢化合物迁移途径。显然，所有这些元素都在一定程度上联系在一起，并受到盐构造的控制。盐的活动受构造和远距离的三叠纪沉积物负荷差异的控制，这表明三叠纪沉积物的动员覆盖了整个区域，而不仅仅是单个二尖瓣结构附近的区域。在这里，我们还将重点关注与盐有关的油气田和相关的石油系统，尤其是圈闭类型，储层和碳氢化合物迁移途径。显然，所有这些元素都在一定程度上联系在一起，并受到盐构造的控制。储集层和油气运移途径。显然，所有这些元素都在一定程度上联系在一起，并受到盐构造的控制。储集层和油气运移途径。显然，所有这些元素都在一定程度上联系在一起，并受到盐构造的控制。