可回收储量的新评估方法及其在碳酸盐气体储库中的应用
Mengfei Zhou1,2,3, Xizhe Li1,2,3, Yong Hu1,2,3
1School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
ACS omega
|June 10, 2024
概括
这项研究开发了一种实验室方法,用于评估天然气储量,并优化低透性水库的回收. 较低的透率和较高的水和度降低了储备利用率,影响了气体回收效率.
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 地质科学
背景情况:
- 压力下降传播表明可回收储量,但在低透性的水库中很难检测到.
- 物理模拟实验提供实时压力和气速数据进行分析.
研究的目的:
- 提出并执行一个实验室方法来评估一个井间距半径内的可回收储量.
- 分析透性,初始水和和废弃气体对储备利用率的影响.
- 为增强天然气回收提供建议.
主要方法:
- 通过使用不同透度和初始水和度的长芯插头进行物理模拟实验.
- 应用了物质平衡方程,并分析了压力特征.
- 进行了用于机制分析的注射试验.
主要成果:
- 较低的透率,较高的初始水和率,以及较高的废气率降低了储备利用范围和程度.
- 一类和二类岩石显示>70.6%的回收效率,直至600米的井间距半径.
- 具有高水和度的III型岩石的最终回收率<10%,排水半径<10m.
结论:
- 该研究提出了一种用于评估可回收储量的实验方法,这对于天然气储库开发战略至关重要.
- 研究结果强调了岩石特性和运行参数对气体回收效率的重大影响.
- 需要优化策略,特别是对于具有特定孔隙结构的低透性水库.
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