Bathymetrically controlled carbonate microfacies of an Upper Devonian (Frasnian) ramp and relationship to correlative reservoirs, western Alberta and northern British Columbia

上泥盆统（弗拉斯阶）坡道测深控制的碳酸盐微相及其与艾伯塔省西部和不列颠哥伦比亚省北部相关储层的关系

• 批准号: 469259-2014
• 负责人: Pratt, Brian
• 金额: $ 1.82万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=563387
• 关键词: Bathymetrically; controlled; carbonate; microfacies; Upper

Upper Devonian limestones, dolomites and shales of the Western Canada Sedimentary Basin, deposited some 375-380 million years ago, still host huge quantities of conventional and unconventional oil and gas resources. The basin was once a vast complex of shallow-water carbonate platforms and adjacent basins somewhat akin to the present-day Bahamas. The ocean lay to the northwest and west. Many subsurface reservoirs have been studied and compared to outcrop analogues in the Rocky Mountains which provide a three-dimensional view. Platform interiors consisted of shallow lagoons and tidal flats, while carbonate sand shoals and organic reefs formed along platform margins. Sediment was washed off the interiors and onto the adjacent slopes. Carbonate mud, clay, silt and enormous amounts of organic carbon accumulated in the deeper areas, subsequently becoming the hydrocarbon source rocks. One setting that has escaped detailed scrutiny is the ocean-facing ramp that developed when the topographic relief of the platforms decreased. Such rocks are fossiliferous limestones and shales. In one locality in the Willmore Wilderness Park, these strata, belonging to the Mount Hawk Formation, host spectacular reefs that once towered 25 m above the surrounding seafloor. This locality offers a unique opportunity to compare the components in the reefs versus the adjacent and overlying beds. The dataset consisting of fossil composition will enable determination of the evolving water depths on the ramp. This information will be applied to understand the role of bathymetry and sea level changes on subsurface carbonate platform margin architecture and accumulation in adjacent basins. Husky Energy Inc. is currently exploring and developing both conventional and unconventional resources, particularly shale gas, in correlative strata, and the outcrop dataset will provide a better understanding of the stratigraphic evolution, water-column productivity and reservoir development especially around these platforms. This dataset puts Husky at a competitive advantage and will guide planned exploration activities and drilling locations.

加拿大西部沉积盆地的泥盆纪上石灰岩，白云岩和页岩存放在约375-3.8亿年前，仍然拥有大量常规和非常规的石油和天然气资源。该盆地曾经是浅水碳酸盐平台的广阔综合体和相邻的盆地，类似于当今的巴哈马。海洋躺在西北和西。已经研究了许多地下储层，并将其与落基山脉的露头类似物进行了比较，这些山山的露头类似物提供了三维视图。平台内饰由浅泻湖和潮汐平底鞋组成，而沿平台边缘形成的碳酸盐沙板鞋和有机珊瑚礁。将沉积物从室内装饰中冲洗到相邻的斜坡上。碳酸盐泥浆，粘土，淤泥和大量的有机碳积聚在更深的区域，随后成为碳氢化合物源岩。避免了详细审查的一种环境是当平台的地形浮雕降低时，面向海洋的坡道。这样的岩石是化石石灰石和页岩。在威尔莫尔荒野公园的一个地方，这些属于霍克山的地层是曾经耸立在周围海底25 m处的壮观珊瑚礁。该地区提供了一个独特的机会，可以比较礁石中的组件与相邻和上覆的床。由化石组成组成的数据集将确定坡道上不断发展的水深。这些信息将应用于了解测深和海平面变化对相邻盆地中碳酸盐平台边缘结构和积累的作用。 Husky Energy Inc.目前正在相关地层探索和开发常规和非常规资源，尤其是页岩气，露头数据集将提供更好地了解地层进化，水下生产率和水库的开发，尤其是在这些平台周围。该数据集将沙哑的竞争优势赋予了竞争优势，并将指导计划的探索活动和钻探地点。