Condensate banking around wellbores can significantly shorten the production from gas-condensate reservoirs. Different approaches to mitigate this issue have been proposed in the literature, among which gas injection comes out with promising results. With this method, pressure maintenance and condensate re-vaporization can be achieved, lessening the flow blockage caused by liquid dropout and accumulation in the porous medium. While gas injection in gas-condensate reservoirs has been largely investigated at the meso and macro scales, data regarding the method's efficiency at the micro-scale are scarce. Therefore, the effects of local changes in gas and condensate properties stemmed from the interaction between injected and reservoir fluids at the pore-scale are poorly understood. In order to evaluate how these changes affect the transport in porous media, a compositional pore-network model was used to reproduce gas injection in a sandstone sample following condensate accumulation. C1, C2, CO2, N2, and produced gas were tested as the candidates for condensate banking remediation at different pressure levels. After gas flooding, condensate saturation, heavy component recovery, and gas relative permeability were quantified to appraise the achieved gas flow improvement. The results indicated that C2 and CO2 were the most effective gases to clear the accumulated condensate and re-establish the gas flow. Conversely, C1 and N2, especially mixed with the produced fluids, displayed the least favorable results, and could even lead to gas flow impairment.
Pore-Scale Dynamics of Multiphase Reactive Transport in Water-Wet Carbonates under CO2-Acidified Brine Injection: Dissolution Patterns and Reaction Rates
Time-Resolved Pore-Scale Imaging of Multiphase Dissolution during CO2-Saturated Brine Injection into a Carbonate: Competition between Hydrocarbon Mobilisation and Swelling
A numerical study on the effect of rolling friction on clogging of pores in particle-laden flows
University of Queensland - Indian Institute of Technology Delhi (UQ-IITD) Research Academy（昆士兰大学-印度理工学院德里分校（UQ-IITD）研究学院）；School of Chemical Engineering, The University of Queensland（昆士兰大学化学工程学院）；Department of Applied Mechanics, Indian Institute of Technology Delhi（印度理工学院德里分校应用力学系）；School of Petroleum, China University of Petroleum - Beijing at Karamay（中国石油大学（北京）克拉玛依校区石油学院）
Learning Pore-scale Multiphase Flow from 4D Velocimetry
Department of Earth Science and Engineering, Imperial College London（帝国理工学院伦敦地球科学与工程系）；Department of Geology, Ghent University（根特大学地质系）；Department of Energy Science and Engineering, Stanford University（斯坦福大学能源科学与工程系）；Department of Computer Science, Yale University（耶鲁大学计算机科学系）；NVIDIA
Stable Dispersion of Coal Fines during Hydraulic Fracturing Flowback in Coal Seam Gas Reservoirs An Experimental Study
在地下煤层气CSG储层中，在生产和开发阶段，特别是在水力压裂增产期间，释放出大量的小尺寸煤粉。这些煤粉不可避免地由于聚集和随后的孔喉堵塞而引起机械泵故障和渗透率损害。因此，这种聚集行为在CSG生产中至关重要，需要最小化。因此，这种煤粉分散体需要稳定化，这可以通过配制改进的压裂液来实现。在这里，因此，我们系统地研究了两种添加剂的有效性;乙醇，0.5重量%和SDBS，0.001和0.01重量%，分散稳定性的广泛的条件：pH值为6至11，盐度为0.1至0.6 M NaCl盐水。在技术上，煤悬浮液流过玻璃珠支撑剂填充物，并测量细粒保留。我们发现，即使是微量的十二烷基苯磺酸钠SDBS，即0.001wt%，大大提高了分散稳定性和减少罚款保留。通过分形维数分析进一步量化保留，其显示含有SDBS的悬浮液的较低值。这项研究推进了当前的CSG应用，从而有助于提高能源安全。
Flow-rate controls on trapped hydrogen redistribution in a heterogeneous sandstone: a synchrotron X-ray micro-CT study
Stanford University（斯坦福大学）；Ghent University（根特大学）；University of Edinburgh（爱丁堡大学）；University of Manchester（曼彻斯特大学）；Diamond Light Source（钻石光源）；University of Southampton（南安普顿大学）；Institute of Environmental Assessment and Water Research (IDAEA)（环境评估与水资源研究所）；Spanish Council for Scientific Research (CSIC)（西班牙科学研究委员会）
Injection-rate effects on failure in a fluid-saturated granular fault gouge
Institute of Earth Sciences, Hebrew University of Jerusalem（耶路撒冷希伯来大学地球科学学院）；Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem（乌斯季纳拉贝姆扬埃万杰利斯塔普尔金耶大学理学院）；Faculty of Science, Charles University（布拉格查理大学理学院）；Université de Strasbourg（斯特拉斯堡大学）；Institut Terre et Environnement de Strasbourg（斯特拉斯堡地球与环境研究所）；PoreLab, The Njord Centre, Departments of Physics and Geosciences, University of Oslo（奥斯陆大学物理与地球科学系尼约德中心孔隙实验室）
