Pore fluid evolution in sedimentary basins: integrated sedimentology and geochemistry of carbonate reservoirs

沉积盆地孔隙流体演化：碳酸盐岩储层综合沉积学和地球化学

• 批准号: 41663-2012
• 负责人: AlAasm, Ihsan
• 金额: $ 1.97万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568848
• 关键词: Pore; fluid; evolution; sedimentary; basins

Despite considerable research over the last two decades on the origin of diagenetic fluids involved limestone diagenesis and dolomitization, the debate about timing and chemistry of these fluids and the extent to which massive dolomites formed in near surface environments as opposed to formation of dolomite bodies at variable burial depths by hydrothermal and burial processes. These dolostones and associated limestone sequences host significant accumulations of oil and gas as well as extensive lead and zinc deposits. The present proposal is part of an ongoing research program, both conceptually and experimentally, on the chemistry, source(s) of diagenetic fluids and timing of fluid flow events in sedimentary basins. It is aimed to put special emphasis on fracture diagenesis, because fractures are often the primary conduits for diagenetic fluids. These fluids do not only result in fracture mineralization but may also induce important diagenetic modifications to the host carbonate rocks. Quantification of the fluid flow using field, structural, petrographic and geochemical tools can be also used to develop conceptual models for the spatial and temporal distribution and connectivity of reservoir porosity and permeability on a regional basinal scale. The proposed research program for the next 5 years will have the following objectives: (1) a better quantification of the main diagenetic events and their responsible originating fluids in sedimentary basins; (2) determination of the relationship between the fractures and deformational or tectonic events (i.e. fracture diagenesis); (3) numerical simulation of fluid/rock interaction (e.g. using reactive transport modeling); (4) determination of patterns of paleo-fluid flow (e.g. numerical modeling); and, (5) unravel the impact of diagenetic events porosity evolution. These objectives can be achieved through careful examination of textural parameters, mapping of regional and local distribution of diagenetic and structural components, geochemistry (stable and radiogenic isotope measurements, fluid inclusions), burial and thermal history curves and quantitative basin modeling techniques.

尽管在过去的二十年中，关于成岩液的起源的大量研究涉及石灰岩成分和白云岩，但有关这些液体的时机和化学的争论以及在近地面环境中形成的大量白云岩，而不是在近地面环境中形成的大量白云岩，而与在水热过程中以可变的埋葬深度和伯利利亚和伯利亚尔和伯利利亚和伯利亚尔的形成。这些多洛酮和相关的石灰石序列具有大量的石油和天然气积聚，以及广泛的铅和锌沉积物。本提案在概念和实验上是关于沉积盆地中流体流动事件的化学，成岩流体的来源的持续研究计划的一部分。它的目的是特别强调裂缝成岩作用，因为裂缝通常是成岩液的主要管道。这些液体不仅会导致裂缝矿化，而且还可能引起对宿主碳酸盐岩石的重要成岩化修饰。 使用场，结构，岩石学和地球化学工具对流体流量进行定量，还可以用于开发概念模型，以在区域盆地尺度上的空间和时间分布以及储层孔隙率和渗透率的连通性。未来5年的拟议研究计划将具有以下目标：（1）更好地量化主要的成岩化事件及其在沉积盆地中负责任的产生流体； （2）确定断裂与变形或构造事件之间的关系（即骨折成岩作用）； （3）流体/岩石相互作用的数值模拟（例如，使用反应性传输建模）； （4）确定古流动流的模式（例如数值建模）； （5）揭开成岩事件孔隙​​率演变的影响。这些目标可以通过仔细检查纹理参数，成岩和结构成分的区域和局部分布，地球化学（稳定和放射性同位素测量，流体夹杂物），埋葬和热历史曲线以及定量盆地建模技术来实现。