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首页> 外文期刊>International Journal of Geosciences >The Use of Seismic Attributes to Enhance Fault Interpretation of OT Field, Niger Delta
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The Use of Seismic Attributes to Enhance Fault Interpretation of OT Field, Niger Delta

机译：使用地震属性来增强尼日尔三角洲OT场的故障解释

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摘要

An integrated approach to the study of the fault patterns and seismic attributes was carried out on the OT field using a 3D swamp seismic data covering approximately 420 Km2 of western belt of the Niger Delta. This study aimed at improving the visualization of faults in the study area using different seismic attributes. Three major growth faults dipping south with few antithetic faults dipping in opposite direction to the growth faults and other minor faults were identified manually on the original and steered seismic cube in the inline 11669, while in the cross line only one major fault was identified manually. The seismic volume was subjected to several stages of post-stack processing to enhance discontinuities. First, a dip-steering volume was created. Several dip-steered filters were then applied to enhance faults and fractures visualization. Finally, similarity and curvature attributes were calculated on the dip-steered and fault enhanced volume. These final attributes show detailed geometry of the fault system and the numerous subtle lineaments in the study area. The integration of the attributes has increased confidence in the seismic mapping of the faults and the other numerous subtle lineaments which were difficult to identify on the input data. Similarity and curvature attributes of the seismic volume preserve subtle structural details and permit a more robust interpretation of the structures.
机译：使用覆盖尼日尔三角洲西部带约420 Km2的3D沼泽地震数据，在OT场上进行了研究断层样式和地震属性的综合方法。这项研究旨在利用不同的地震属性来改善研究区域中断层的可视化。在直插式11669的原始和转向地震立方体上，手动识别了三个南倾的主要生长断层，几乎没有与生长断层相反的对立断层，其他的次要断层则被手动识别，而在交叉线中，仅人工识别了一个主要断层。地震体经历了叠后处理的几个阶段，以增强不连续性。首先，创建了浸入转向体积。然后应用了几种浸入导向的过滤器以增强断层和裂缝的可视化。最后，在倾角转向和断层增强体积上计算相似度和曲率属性。这些最终属性显示了断层系统的详细几何形状以及研究区域中众多微妙的特征。属性的集成增加了对断层和其他许多难以在输入数据上识别的细微构造的地震映射的信心。地震体积的相似性和曲率属性保留了细微的结构细节，并允许对结构进行更可靠的解释。

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