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通过X射线微型CT成像,在自发的水浸泡过程中描绘紧密的砂岩的多孔性演变

Marta Miletić¹, Ceren Küçükuysal^2,3, Merve Gülcan^2,3

¹Department of Civil, Construction, and Environmental Engineering, San Diego State University, San Diego, CA, USA.

|June 7, 2024

概括

在紧密的砂岩中自发的水浸泡会改变由于可溶性矿物质和粘土的不均性. 这项研究使用多尺度成像揭示了多孔性变化,这对于增强石油回收和液压压裂研究至关重要.

科学领域:

石油地质科学石油地质科学
储水库工程储水库工程
材料科学材料科学材料科学

背景情况:

在水库岩石中,水浸透对于水力压裂和增强石油回收至关重要.
紧密的砂岩呈现复杂的孔隙结构,影响着沉浸行为.
了解这些岩石中水浸泡过程中的多孔性演变至关重要.

研究的目的:

为了研究自发的水浸泡对紧密的砂岩的多孔性演变的影响.
为了描述Torrey Buff砂岩的孔隙结构和矿物学.
分析由矿物溶解和粘土膨胀影响的不均的多孔性变化.

主要方法:

多尺度成像 (X射线计算机断层扫描,扫描电子显微镜).
实验室实验 (孔径-透度测量).
分析技术 (X射线衍射,FTIR,SEM-EDS,热重力测量) 进行分析.

主要成果:

托雷布夫砂岩 (12.3%的多孔度,2.05mD的透度) 含有石英,粘土 (伊利石,高石),K-feldspar,多洛米特和石.
高溶性碳酸盐和水友性酸盐会影响沉浸能力.
在10小时内,水浸泡使平均毛孔尺寸增加了1.28%,整个核心的毛孔度发生了不均的近线性变化.

结论:

自发的水浸泡导致紧密的砂岩中不均的孔状性演变.
可溶性矿物质和水友性粘土显著影响微观结构和多孔性变化.
多尺度成像对于研究EOR和液压压裂应用中紧密的砂岩中的浸泡至关重要.

关键词:

低透性低透性的毛孔表面矿物学毛孔表面矿物学分段化分段化分段化分段化自发的毛细血管沉浸.狭窄的砂岩是一个狭窄的砂岩.电脑断层扫描X射线扫描

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