使用单孔和双孔性模型对紧碳酸盐中天然气生产的CFD估计
Syed Oubee Khadri1, Ibnelwaleed A Hussein2,3, Fadhil Sadooni4
1Gas Processing Center, Qatar University, P.O. Box 2713, Doha, Qatar.
Scientific reports
|December 19, 2023
概括
本研究引入了新的单孔和双孔碳酸盐储的新型运输模型,包括Knudsen扩散,脱吸和粘性流. 这些模型增强了对这些复杂构成中的流体流动的理解.
科学领域:
- 石油工程是石油工程中的一个.
- 储水库工程 储水库工程
- 地质科学是地球科学.
背景情况:
- 紧密的碳酸盐储库在矿物学,孔隙结构和储存方面表现出复杂的异质性,这给运输建模带来了挑战.
- 现有的模型往往侧重于页岩或煤床甲,留下了一个空白,用于严格的碳酸盐特定运输模拟.
- 了解紧碳酸盐中的流体流动对于优化碳化合物回收至关重要.
研究的目的:
- 提出和分析针对紧密碳酸盐储库的新型单孔和双孔运输模型.
- 为了整合关键的运输机制,包括Knudsen扩散,脱和粘性流.
- 调查为页岩水库开发的模型对紧碳酸盐的适用性.
主要方法:
- 开发一个包含Knudsen扩散,脱吸和粘性流的数值传输模型,使用表面透性模型.
- 应用有限元法 (FEM) 用于通过COMSOL多物理进行数值分析.
- 建议模型与现有文献中的分析解决方案进行验证.
主要成果:
- 双孔度模型预测高峰产量为104,000 m3/day,而单孔度模型显示较低的生产率.
- 该研究证实,页岩水库的运输模型可以适应紧密的碳酸盐,因为它们具有共享的纳米孔状特性.
- 发现,由于酸盐的亲和力较低,溶解对整体甲产生的影响很小.
结论:
- 开发的单孔和双孔性模型为了解碳酸盐储中的流体运输提供了一个框架.
- 这项研究强调了在运输建模中考虑特定的水库特征的重要性,例如孔隙结构和矿物学.
- 进一步的研究可能会探讨不同酸性区域特性和吸附异温体对生产的影响.
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