An advanced analytical solution for pressure build-up during CO2 injection into infinite saline aquifers: The role of compressibility

doi:10.1016/j.advwatres.2017.12.010

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

	An advanced analytical solution for pressure build-up during CO2 injection into infinite saline aquifers: The role of compressibility
	Wu Haiqing; Bai Bing; Li Xiaochun
刊名	ADVANCES IN WATER RESOURCES
	2018
卷号	112 页码:95-105
关键词	Analytical solution Compressibility CO2-brine flow Relative permeability CO2 geological storage
ISSN号	0309-1708
DOI	10.1016/j.advwatres.2017.12.010
英文摘要	Existing analytical or approximate solutions that are appropriate for describing the migration mechanics of CO2 and the evolution of fluid pressure in reservoirs do not consider the high compressibility of CO2, which reduces their calculation accuracy and application value. Therefore, this work first derives a new governing equation that represents the movement of complex fluids in reservoirs, based on the equation of continuity and the generalized Darcy's law. A more rigorous definition of the coefficient of compressibility of fluid is then presented, and a power function model (PFM) that characterizes the relationship between the physical properties of CO2 and the pressure is derived. Meanwhile, to avoid the difficulty of determining the saturation of fluids, a method that directly assumes the average relative permeability of each fluid phase in different fluid domains is proposed, based on the theory of gradual change. An advanced analytical solution is obtained that includes both the partial miscibility and the compressibility of CO2 and brine in evaluating the evolution of fluid pressure by integrating within different regions. Finally, two typical sample analyses are used to verify the reliability, improved nature and universality of this new analytical solution. Based on the physical characteristics and the results calculated for the examples, this work elaborates the concept and basis of partitioning for use in further work.
WOS研究方向	Water Resources
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000427990700007
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4224]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Wu Haiqing,Bai Bing,Li Xiaochun. An advanced analytical solution for pressure build-up during CO2 injection into infinite saline aquifers: The role of compressibility[J]. ADVANCES IN WATER RESOURCES,2018,112:95-105.
APA	Wu Haiqing,Bai Bing,&Li Xiaochun.(2018).An advanced analytical solution for pressure build-up during CO2 injection into infinite saline aquifers: The role of compressibility.ADVANCES IN WATER RESOURCES,112,95-105.
MLA	Wu Haiqing,et al."An advanced analytical solution for pressure build-up during CO2 injection into infinite saline aquifers: The role of compressibility".ADVANCES IN WATER RESOURCES 112(2018):95-105.