勘探和生产:减少中东地区的地质风险

T. Cousins, R. Davies, C. Gravestock, T. Jewell, M. Simmons, O. Sutcliffe
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引用次数: 0

摘要

中东地区的勘探可以从基于层序地层学的、可扩展的地下3D模型中受益,这些模型实际上是一个从板块延伸到孔隙的地下数字孪生体。该模型结合了地层和构造组织,为储层和区域尺度的地质分析提供了一个预测的地质框架。这一框架使在阿拉伯板块上测试新的地质概念成为可能。模型设计的第一步是暂时将数据约束在层序地层格架内。在整个模型的构建中使用了公开可用的数据。这一框架能够生成整个板块的年代地层图和总沉积环境图,这些图有助于确定区域地质环境的主要变化。地球动力学板块模型的整合也为这些地质时空变化提供了更深入的了解。地下模式还采用了地球系统科学的原理,以深入了解古气候的性质及其对提高地下模式预测能力的潜在影响。可以构建一套板块尺度的区域深度格架。当这些数据与GDE地图和其他地层数据相结合时,有助于盆地筛选和勘探风险。通过在整个阿拉伯板块发展新的游戏概念和想法,这种从板块到游戏的方法论已经产生了价值。勘探历来依赖于对大型构造的识别。然而,其中的大多数现在正在被利用。未开发的地层圈闭和非常规资源是新概念,可以通过使用地下数字孪生来更好地评估。地震数据和层序地层标定电缆测井数据的整合可以用于识别不整合面下的亚作物模式,以及潜在储层岩石与密封并置的区域。陆架内盆地是阿拉伯板块的一个重要特征。它们导致地层复杂性,同时也是烃源岩和储层发育的关键因素。从非常规的角度来看,也可以在突出的烃源岩层段内或以上建立新的致密储层。因此,可以从地球科学数据的地层属性中产生对以前未被充分开发的油气藏概念的价值和见解,例如在阿布扎比的志留系Qusaiba段和白垩纪Shilaif组中。这些数据可以使更明智的预测进入远离数据控制的“空白”。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploration and Production: Reducing Geological Risk in the Middle East
Exploration in the Middle East can benefit from the creation of sequence stratigraphy-based, scalable, 3D models of the subsurface that are, in effect, a subsurface digital twin that extends from the plate to pore. Stratigraphic and structural organization are integrated into this model to provide a predictive geological framework for analysis of reservoir- and regional-scale geology. This framework enables testing of novel geologic concepts on the Arabian Plate. The first step of model design is to temporally constrain data within a sequence stratigraphic framework. Publically available data were used in the entire construction of this model. This framework enables the generation of plate-wide chronostratigraphic charts and gross depositional environment (GDE) maps that help to define major changes in the regional geological context. The integration of a geodynamic plate model also provides deeper insight into these spatial and temporal changes in geology. The subsurface model also adopts the principles of Earth systems science to provide insight into the nature of paleoclimate and its potential effect on enhancing the predictive capabilities of the subsurface model. A set of plate-scale regional depth frameworks can be constructed. These, when integrated with GDE maps and other stratigraphic data, facilitate basin screening and play risking. This plate to play methodology has yielded value through the development of new play concepts and ideas across the Arabian Plate. Exploration has historically relied on the identification of large structures. However, the majority of these are now being exploited. Underexplored stratigraphic traps, and unconventional resources are new concepts that can be better evaluated by using a digital twin of the subsurface. The integration of seismic data and sequence-stratigraphy-calibrated wireline log data can be used to identify the subcrop pattern beneath an unconformity, as well as regions where potential reservoir rocks are in juxtaposition with seals. Intrashelf basins are a key feature of the Arabian Plate. They lead to stratigraphic complexity, yet are key factors for both source rock and reservoir development. From an unconventional perspective, novel, tight plays that exist within or above prominent source rock intervals can also be established. Value and insight into previously underexplored play concepts, such as within the Silurian Qusaiba Member and the Cretaceous Shilaif Formation of Abu Dhabi, can thus be generated from the stratigraphic attribution of geoscience data. This data can enable better-informed predictions into "white space" away from data control.
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