Hadi Mosleh M, Turner M, Sedighi M, Vardon P J
Geoenvironmental Research Centre, School of Engineering, Cardiff University, The Queen's Buildings, Newport Road, Cardiff CF24 3AA, United Kingdom.
Rev Sci Instrum. 2017 Jan;88(1):015108. doi: 10.1063/1.4973963.
This paper presents the design, development, and application of a laboratory setup for the experimental investigations of gas flow and reactions in a fractured rock. The laboratory facility comprises (i) a high pressure manometric sorption apparatus, where equilibrium and kinetic phenomena of adsorption and desorption can be examined, (ii) a high pressure triaxial core flooding system where the chemical reactive transport properties or processes can be explored, and (iii) an ancillary system including pure and mixed gas supply and analysis units. Underground conditions, in terms of pore pressure, confining pressure, and temperature, can be replicated using the triaxial core flooding system developed for depths up to 2 km. Core flooding experiments can be conducted under a range of gas injection pressures up to 20 MPa and temperatures up to 338 K. Details of the design considerations and the specification for the critical measuring instruments are described. The newly developed laboratory facility has been applied to study the adsorption of N, CH, and CO relevant to applications in carbon sequestration in coal and enhanced coalbed methane recovery. Under a wide range of pressures, the flow of helium in a core sample was studied and the evolution of absolute permeability at different effective stress conditions has been investigated. A comprehensive set of high resolution data has been produced on anthracite coal samples from the South Wales coalfield, using the developed apparatus. The results of the applications provide improved insight into the high pressure flow and reaction of various gas species in the coal samples from the South Wales coalfield.
本文介绍了一种用于裂隙岩石中气体流动和反应实验研究的实验室装置的设计、开发和应用。该实验室设施包括：（i）一个高压测压吸附装置，可用于研究吸附和解吸的平衡及动力学现象；（ii）一个高压三轴岩心驱替系统，可用于探索化学反应输运性质或过程；（iii）一个辅助系统，包括纯气和混合气供应及分析单元。利用为深度达2 km开发的三轴岩心驱替系统，可以复制地下孔隙压力、围压和温度条件。岩心驱替实验可以在高达20 MPa的一系列气体注入压力和高达338 K的温度下进行。文中描述了设计考虑因素和关键测量仪器的规格细节。新开发的实验室设施已应用于研究与煤炭碳封存和强化煤层气开采相关的N₂、CH₄和CO₂的吸附。在广泛的压力范围内，研究了氦气在岩心样品中的流动，并研究了不同有效应力条件下绝对渗透率的变化。使用该开发装置，已针对南威尔士煤田的无烟煤样品生成了一套全面的高分辨率数据。这些应用结果有助于更深入地了解南威尔士煤田煤样中各种气体在高压下的流动和反应情况。
