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在不同的溶液条件下,纳米裂孔中的水的发生特征:考利尼特的案例研究
Zhiyan Zhou1,2, Junqian Li1,2, Zhaojing Song1,2
1School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China.
ACS omega
|June 5, 2023
概括
纳米孔中的水通过影响甲流量,显著影响页岩气生产. 这项研究表明,虽然温度和压力对高矿的水吸附有很小的影响,但当涉及多种流体时,竞争性吸附会减少水的存在.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 石油工程是石油工程中的一个.
背景情况:
- 纳米孔中的水存在对于甲的发生和流动至关重要,直接影响页岩气生产.
- 了解粘土纳米孔中的水行为对于准确的气体生产预测至关重要.
研究的目的:
- 在in situ条件下,研究考利尼特纳米孔内的液态水的发生特征和影响变量.
- 分析温度,压力,离子和混合相系统对高酸盐中水吸附的影响.
主要方法:
- 利用分子动力学模拟来研究高酸纳米孔中的液态水.
- 模拟了三个系统:纯水,CaCl2溶液和H2O/CH4混合相.
- 多种温度 (80-120°C) 和压力 (70-120 MPa),以评估环境影响.
主要成果:
- 在不同条件下,高利尼特Al-O表面的水吸附保持稳定.
- 在Si-O表面的吸附率显示,随着温度的增加,吸附率略有下降.
- 存在离子或混合H2O/CH4相,由于竞争性吸附,降低了水吸附能力.
- 甲分子在水中形成集群,这是由于强烈的键.
结论:
- 温度和压力等外部条件对高酸纳米孔中的水的基本状态的影响有限.
- 当多种流体类型 (如气体和水) 并存时,竞争性吸附显著减少了水的存在.
- 这些发现为优化页岩气回收提供了对水气相互作用的见解,这对于优化页岩气回收至关重要.
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