Hydromechanical Response and Impact of Gas Mixing Behavior in Subsurface CH4 Storage with CO2-Based Cushion Gas

doi:10.1021/acs.energyfuels.9b00518

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Hydromechanical Response and Impact of Gas Mixing Behavior in Subsurface CH4 Storage with CO2-Based Cushion Gas
	Ma, Jianli ; Li, Qi ; Kempka, Thomas ; Kuehn, Michael
刊名	ENERGY & FUELS
	2019
卷号	33 期号:7 页码:6527-6541
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.9b00518
英文摘要	Power-to-gas (PtG) stores chemical energy by converting excess electrical energy from renewable sources into an energy-dense gas. Due to its higher available capacity compared to surface-based storage technologies, subsurface storage in geological systems is the most promising approach for efficient and economic realization of the PtG system's storage component. For this purpose, methane (CH4) produced by methanation by means of hydrogen (H-2) and carbon dioxide (CO2) is stored in a geological reservoir until required for further use. In this context, CO2 is used as the cushion gas to maintain reservoir pressure and limiting working gas, i.e., (CH4) losses during withdrawal periods. Consequently, mixing of both gases in the reservoir is inevitable. Therefore, it is necessary to minimize the gas mixing region to optimize the efficiency of the PtG system's storage component. In the present study, the physical properties of CH4, CO2 and their mixtures are reviewed. Then, a multicomponent flow model is implemented and validated against published data. Next, a hydromechanically coupled model is established, considering fluid flow through porous media and effective stresses to investigate the mixing behavior of both gases and the mechanical reservoir stability. The simulation results show that, with increasing reservoir thickness and dip angle, the mixing region is reduced during gas injection if CO2 is employed as the cushion gas. In addition, the degree of mixing is lower at higher temperatures. Feasible injection rates and injection schedules can be derived from the integrated reservoir stability analysis. The methodology developed in the present study allows the determination of optimum strategies for storage reservoir selection and gas injection scheduling by minimizing the gas mixing region.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
WOS记录号	WOS:000476693400078
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14946]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.GFZ German Res Ctr Geosci, Fluid Syst Modelling, D-14473 Potsdam, Germany; 4.Univ Potsdam, Earth & Environm Sci, D-14469 Potsdam, Germany
推荐引用方式 GB/T 7714	Ma, Jianli,Li, Qi,Kempka, Thomas,et al. Hydromechanical Response and Impact of Gas Mixing Behavior in Subsurface CH4 Storage with CO2-Based Cushion Gas[J]. ENERGY & FUELS,2019,33(7):6527-6541.
APA	Ma, Jianli,Li, Qi,Kempka, Thomas,&Kuehn, Michael.(2019).Hydromechanical Response and Impact of Gas Mixing Behavior in Subsurface CH4 Storage with CO2-Based Cushion Gas.ENERGY & FUELS,33(7),6527-6541.
MLA	Ma, Jianli,et al."Hydromechanical Response and Impact of Gas Mixing Behavior in Subsurface CH4 Storage with CO2-Based Cushion Gas".ENERGY & FUELS 33.7(2019):6527-6541.