干旱区生态环境知识资源中心(Arid): Numerical Simulation Study of Silica and Calcite Dissolution Around a Geothermal Well by Injecting High pH Solutions with Chelating Agent.

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报告编号	DE2009949970
	Numerical Simulation Study of Silica and Calcite Dissolution Around a Geothermal Well by Injecting High pH Solutions with Chelating Agent.
	Xu, T; Rose, P; Fayer, S; Pruess, K.
英文摘要	Dissolution of silica, silicate, and calcite minerals in the presence of a chelating agent (NTA) at a high pH has been successfully performed in the laboratory using a high-temperature flow reactor. The mineral dissolution and porosity enhancement in the laboratory experiment has been reproduced by reactive transport simulation using TOUGHREACT. The chemical stimulation method has been applied by numerical modeling to a field geothermal injection well system, to investigate its effectiveness. Parameters from the quartz monzodiorite unit at the Enhanced Geothermal System (EGS) site at Desert Peak (Nevada) were used. Results indicate that the injection of a high pH chelating solution results in dissolution of both calcite and plagioclase minerals, and avoids precipitation of calcite at high temperature conditions. Consequently reservoir porosity and permeability can be enhanced especially near the injection well.
英文关键词	Injection wells Chelating agents Geothermal fluids Silica Dissolution Simulation Permeability Precipitation
出版年	2009
语种	英语
国家	United States
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=59fd668531c97d1d54ae2528
来源机构	Technical Information Center Oak Ridge Tennessee
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/273691
推荐引用方式 GB/T 7714	Xu, T,Rose, P,Fayer, S,et al. Numerical Simulation Study of Silica and Calcite Dissolution Around a Geothermal Well by Injecting High pH Solutions with Chelating Agent.,2009.