Capillary-Driven Transport of Dissolved Salt to the Drying Zone During CO2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {CO}_{2}$$\end{document} Injection in Homogeneous and Layered Porous Media

被引:0
作者
Saskia M. Roels
Ntiana El Chatib
Costas Nicolaides
Pacelli L. J. Zitha
机构
[1] Delft University of Technology,
关键词
sequestration; Salt precipitation; Core flooding; Capillary-driven flow;
D O I
10.1007/s11242-015-0601-y
中图分类号
学科分类号
摘要
A major challenge of CO2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {CO}_{2}$$\end{document} injection into saline aquifers is the risk of formation clogging due to salt precipitation. Capillary-driven flow of brine can provide a continuous transport of dissolved salt toward the dry zone around the injection well where it ultimately precipitates due to evaporation. In this study, core flooding experiments were performed in homogeneous coarse-textured cores and in layered cores consisting of a coarse-textured layer overlying a fine-textured layer. CO2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {CO}_{2}$$\end{document} was injected through a well in the upper part of the cores, and the bottom parts functioned as brine sources. Impairment in injectivity was found due to accumulation of precipitated salt caused by capillary-driven flow from the brine sources to the upper dryer region. Compared to flow domains without a brine source, we found that capillary-driven upward flow at first prevents complete clogging because the porous medium remains wet, but eventually leads to a more severe clogging of the entire domain. The results show that after sufficient dry-out, a coarse-textured injection layer can draw brine from an underlying fine-textured layer by capillary forces. A connected fine-textured layer can therefore contribute to salt precipitation and clogging of the injection layer.
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页码:411 / 424
页数:13
相关论文
共 64 条
[1]  
Akin S(2003)Computed tomography in petroleum engineering research Geol. Soc. Lond. Spec. Publ. 215 23-38
[2]  
Kovscek A(2010)Impact of capillary pressure, salinity and in situ conditions on Transp. Porous Media 84 799-819
[3]  
Alkan H(2014) injection into saline aquifers Int. J. Greenh. Gas Control 22 301-312
[4]  
Cinar Y(2011)Well injectivity during Energy Procedia 4 4450-4456
[5]  
Ülker E(2013) storage operations in deep saline aquifers-Part 2: Numerical simulations of drying, salt deposit mechanisms and role of capillary forces Int. J. Greenh. Gas Control 12 478-492
[6]  
André L(1984)Experimental investigation into salt precipitation during Practical cone-beam algorithm. JOSA A 1 612-619
[7]  
Peysson Y(2007) injection in saline aquifers Energy Convers. Manag. 48 1816-1826
[8]  
Azaroual M(2011)Displacement and mass transfer between saturated and unsaturated Chem. Eng. Res. Des. 89 1855-1864
[9]  
Bacci G(2008)-brine systems in sandstone Phys. Rev. E 77 056309-3514
[10]  
Korre A(2009)2D modeling of salt precipitation during the injection of dry Energy Procedia 1 3507-344