Capillary trapping induced slow evaporation in nanochannels
Capillary trapping induced slow evaporation in nanochannels
复制标题
毛细管捕获引起纳米通道中的缓慢蒸发
DOI：
10.1016/j.petrol.2020.108084
复制
发表时间：
2021
影响因子：
--
通讯作者：
赵双良
中科院分区：
文献类型：
--
作者：
鲍博;邱俊杰;刘芬;范启越;罗薇;赵双良
非常规油藏规模巨大，在全球能源中所占的份额越来越大，学术界、工业界和政府等广泛的利益相关者也参与其中。非常规储层中的孔隙尺寸可以小至纳米，因此需要对纳米尺度的流体相特性有更深入的基础了解。在本文中，我们研究了毛细管捕集通过等温压下降诱导纳米通道阵列中正戊烷缓慢蒸发，以模拟低渗透储层纳米孔中碳氢化合物的释放。重要的是，毛细管捕集是在储层压力缓慢降低过程中形成的，并且显着阻碍液体蒸发。与没有任何毛细管捕集的蒸发情况相比，整体蒸发率低约16倍，这对气体采收率产生不利影响。此外，我们还观察到了纳米通道内液体角流辅助蒸发的过程，为之前的理论研究提供了重要的实验证据。简而言之，我们的工作揭示了一种与页岩气回收根本相关的纳米级异常蒸发。实验和建模结果表明，以适当的速率调节压力下降对于有效开采页岩气起着关键作用。
Unconventional reservoirs are massive and providing an increasing share of global energy with a broad group of stakeholders in academia, industry and government. The size of pores in unconventional reservoirs can be down to nanometers, necessitating a deeper fundamental understanding of fluid phase properties at nanoscale. In this paper, we investigate capillary trapping induced slow evaporation of n-pentane in nanochannel arrays through isothermal pressure drawdown to mimic the hydrocarbon release in nanopores of low-permeability reservoirs. Importantly, the capillary trapping forms during a slow reservoir pressure reduction process and significantly impedes liquid evaporation. Compared to the evaporation case without any capillary trapping, the global evaporation rate is ~16 times lower, which unfavorably affects gas recovery. In addition, we observe liquid corner flow in assisting evaporation in nanochannel, providing important experimental evidence towards previous theoretical study. In brief, our work reveals a type of anomalous evaporation at nanoscale that is fundamentally relevant to shale gas recovery. The experimental and modeling finding indicates that regulating pressure drawdown at an appropriate rate plays a key role in efficiently extracting shale gas.
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DOI：
10.1073/pnas.1014075109
发表时间：
2012-03-06
影响因子：
11.1
作者：
Duan, Chuanhua;Karnik, Rohit;Majumdar, Arun
通讯作者：
Majumdar, Arun
影响因子：
5.4
作者：
A. Mehmani;Shaina Kelly;C. Torres‐Verdín;M. Balhoff
通讯作者：
A. Mehmani;Shaina Kelly;C. Torres‐Verdín;M. Balhoff
DOI：
10.1016/j.ijggc.2015.04.006
发表时间：
2015-09-01
影响因子：
3.9
作者：
Krevor, Samuel;Blunt, Martin J.;Niu, Ben
通讯作者：
Niu, Ben
影响因子：
--
作者：
Bahrami, Hassan;Rezaee, Reza;Clennell, Ben
通讯作者：
Clennell, Ben
影响因子：
--
作者：
N. Gershenzon;R. Ritzi;D. Dominic;E. Mehnert;Roland Okwen;Christopher Patterson
通讯作者：
N. Gershenzon;R. Ritzi;D. Dominic;E. Mehnert;Roland Okwen;Christopher Patterson