在双尺度多孔介质中不均的流体运输建模,考虑流体-固体相互作用
Ming Ma1, Hamid Emami-Meybodi1
1John and Willie Leone Family Department of Energy and Mineral Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
Langmuir : the ACS journal of surfaces and colloids
|August 16, 2024
概括
这项研究模拟了页岩中的流体运输,揭示了纳米孔相互作用如何影响石油生产和二氧化碳注入. 沉重的碳化合物被限制在纳米孔中,但二氧化碳注入可以取代它们.
科学领域:
- 石油工程是石油工程中的一个.
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 在有机丰富的页岩等超窄的水库中,由于纳米孔流体-固体相互作用,流体运输是复杂的.
- 传统模型很难捕捉到页岩中的双尺度孔隙性和复杂的流体行为.
研究的目的:
- 开发用于初级生产和页岩气注入的多相多组件运输模型.
- 将密度函数理论 (DFT) 纳入纳米孔内的精确流体-固体相互作用建模.
- 模拟碳化合物生产和二氧化碳注入有机丰富的页岩.
主要方法:
- 根据孔径尺寸分布将页岩孔隙空间划分为宏孔和纳米孔.
- 使用密度函数理论 (DFT) 来计算不均的流体密度和相位行为.
- 将DFT衍生性质集成到基于麦克斯韦尔-斯蒂芬的多相多组件运输模型中.
主要成果:
- DFT准确地捕获纳米孔中的流体不均性,与立方体状态方程不同.
- 流体存在于受限和散装状态,具有30纳米的值.
- 由于强烈的液体-固体相互作用,更重的碳化合物会积聚在纳米孔中,阻碍它们在初级生产期间的移动性.
- 二氧化碳注入改变了流体组成,并通过竞争性相互作用从纳米孔中取代碳化合物.
结论:
- 纳米孔中的液体-固体相互作用显著影响页岩水库中的碳化合物流动性和回收.
- 开发的模型提供了一个更准确的流体运输在双孔系统的表现.
- 二氧化碳注入显示了通过从纳米孔中取代被困的碳化合物来增强石油回收的潜力.
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