Hydrocarbon Exploration Risk Assessment in Structurally Complex Areas. Examples from Western Greece

M. Marin, B. Wygrala, E. Mavridou
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引用次数: 1

Abstract

Summary Hydrocarbon exploration in structurally complex areas such as Western Greece requires good understanding of the main uncertainties controlling the petroleum systems and its associated risks. In the case of the external zones of the Hellenides Fold Belt such complexities are dominated by the presence of Upper Triassic evaporitic units that represent the regional detachment of the thrust sequences. The presence of salt in this fold belt exerts an important control on the structural style and, therefore, the structural play type. In basin and petroleum systems analysis, the reconstruction of the burial history is decisive to assess the quality of source, reservoir and seal rocks. With this purpose, and in order to better understand the main uncertainties present in the area of study, sensitivity analysis of the eroded thicknesses occurred in the Ionian zone during compression and uplift in the Miocene has been performed using maturity data at different locations. These erosion estimates allow constraining the restoration of structural sections and a better 2D analysis of the burial history of the area. In the Ionian zone, and due to tectono-stratigraphic variations from north to south, the assessment allows discerning between areas with different timing of hydrocarbon generation and potential trap charge.
构造复杂地区油气勘探风险评价来自西希腊的例子
在希腊西部等构造复杂的地区进行油气勘探,需要对控制油气系统的主要不确定性及其相关风险有很好的了解。在Hellenides褶皱带的外部带,这种复杂性主要是由上三叠统蒸发单元的存在所控制的,这些蒸发单元代表了逆冲层序的区域分离。褶皱带中盐的存在对构造样式和构造油气藏类型具有重要的控制作用。在盆地和含油气系统分析中,埋藏史的重建是评价烃源岩、储层和盖层质量的关键。为此,为了更好地了解研究区域存在的主要不确定性,利用不同地点的成熟度数据,对中新世挤压和隆升过程中爱奥尼亚带发生的侵蚀厚度进行了敏感性分析。这些侵蚀估计可以限制结构部分的修复,并对该地区的埋葬历史进行更好的二维分析。在爱奥尼亚带,由于构造地层自北向南的变化,该评价可以区分不同生烃时间和潜在圈闭充注的区域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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