在含油的非传统泥石中发生裂纹矩阵流体交换
Johnathan Moore1, Dustin Crandall1, Sean Sanguinito1
1U.S. Department of Energy, National Energy Technology Laboratory, Morgantown, WV, 26507, USA.
Scientific reports
|December 8, 2023
概括
矿物学决定了非常规的水库特性. 含有大量碳酸盐的泥石是不透的,而无碳酸盐的岩石提供更好的透性,影响流体流动和回收.
科学领域:
- 地质科学 地质科学
- 石油工程是石油工程中的一个.
- 材料科学 材料科学 材料科学
背景情况:
- 非常规水库的孔机性能对于了解液体流量和压力反应在水力压裂等操作期间至关重要.
- 矿物学,特别是碳酸盐含量,显著影响这些特性和毛孔空间的可访问性.
- 微裂和床层分层在这些材料中的大规模运输中发挥着关键作用.
研究的目的:
- 量化末端非传统储材料的多孔性访问,重点关注碳酸盐含量的变化.
- 调查网封闭压力对透性可访问性的影响.
- 阐明控制断裂/矩阵流体交换的机制及其对流体回收的影响.
主要方法:
- 使用气的3DX射线计算机断层扫描 (CT) 用于在空间和时间上绘制可访问的孔隙.
- 在3DCT测量中采用了基于物理的数据分析.
- 在一系列与操作干扰相关的净限制应力下量化可访问的多孔性.
主要成果:
- 碳酸盐含量高的泥石在核心尺度上表现出近乎无性,而无碳酸盐的类似物则显示出改进的微观结构访问.
- 穿孔性进入沿着微裂开始,随后缓慢地透到岩石基质中.
- 微裂不提供对邻近岩石基质的均接入;微裂附近的液体积累表明由于合的波弹性效应,迁移受到阻碍.
结论:
- 微裂纹和岩石基质的带弹性反应阻碍了流体迁移,解释了低油脂回收因子.
- 结果为预测水库规模和开发增强的液体提取技术提供了洞察力.
- 该研究为了解与二氧化碳储存相关的页岩储存能力提供了基础.
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