Paleozoic Tight Reservoirs in Algeria; Fault and Fracture Network Modeling in a Challenging Complex Geological Environment

J. V. Dijk, A. Ajayi, L. D. Vincenzi, H. Ellen, Hasan Guney, P. Holloway, M. Khdhaouria
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Abstract

Summary A fully integrated multidisciplinary workflow has been applied using up to date technologies in order to prove deliverability of already discovered and proven resources, and explore for new (Palaeozoic and basement) reservoir levels and other prospects in the areas of Tinrhert (Ilizzi-Berkine Basin) and M’Sari Akabli (Ahnet Basin) Blocks. Extensive analyses of vintage 2d and 3d seismic data and previously drilled wells has been performed over the last 4 years. New 2d seismic data were acquired and vintage 3d seismic data have been reprocessed in various phases. The multiscale workflow presented shows the results of seismic mapping and depth modeling, seismic attribute analyses, well log correlation, image log analyses including stress field analyses, core data and remote sensing data analyses. Completely new approaches are outlined regarding the multiscale treatment of remote sensing data regarding fractures and faults, and regarding data driven DFFN modeling in the 3d domain. The results constitute a solid backbone for the planning of future appraisal wells in this complex and challenging geological environment.
阿尔及利亚古生界致密储层;复杂地质环境下的断层和裂缝网络建模
在Tinrhert (Ilizzi-Berkine盆地)和M 'Sari Akabli (Ahnet盆地)区块,为了证明已发现和已探明资源的产能,并勘探新的(古生代和基底)储层和其他远景,已经采用了一种完全集成的多学科工作流程。在过去的4年里,研究人员对2d和3d地震数据和之前钻探的井进行了广泛的分析。获取了新的二维地震资料,并对三维地震资料进行了不同阶段的再处理。提出的多尺度工作流程展示了地震填图和深度建模、地震属性分析、测井对比、包括应力场分析在内的图像测井分析、岩心数据和遥感数据分析的结果。在裂缝和断层遥感数据的多尺度处理和数据驱动的三维DFFN建模方面,提出了全新的方法。这些结果为在这种复杂而具有挑战性的地质环境中进行未来评价井的规划提供了坚实的基础。
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