干旱区生态环境知识资源中心(Arid): Simulating Injectate/Rock Chemical Interaction in Fractured Desert Peak Quartz Monzonite.

Arid

报告编号	DE2006877748
	Simulating Injectate/Rock Chemical Interaction in Fractured Desert Peak Quartz Monzonite.
	Viani, B. E; Roberts, J. J; Detwiler, R. L; Roberts, S. K; Carlson, S. R.
英文摘要	Simulations of the interactions of injected fluids with minerals within an engineered fracture in a sample of Desert Peak quartz monzonite were compared with experimental observations of fluid chemistry and fracture permeability. The observed decrease in permeability and effective hydraulic aperture was much more rapid ((approx)1.0 (micro)m/day) for a core injected with a mixed salt solution containing dissolved silica (near-saturation injectate), compared to cores injected with NaCl (far-from-saturation injectate) ((approx)0.1 (micro)m/day). Simulations were in qualitative agreement with these observations. Near-saturation injectate is predicted to result in net precipitation of secondary phases in the fracture ((approx)0.12 (micro)m/day), compared to a net dissolution of the rock for the far-from-saturation injectate ((approx)0.3 (micro)m/day). Permeability loss for the near-saturation-injectate is ascribed to precipitation in the fracture as well as potential dissolution of primary mineral asperities. Permeability loss for the far-from-saturation fluid is ascribed to dissolution of asperities and smoothing of the fracture. Post-test analysis of the fracture surface will be necessary to verify the processes occurring. The simplified geochemical models used do not account for mineral heterogeneity or for distributions of fluid residence times which could be important controls on permeability evolution. Further analysis is planned to explicitly account for these phenomena.
英文关键词	Simulation Quartz monzonite Chemical interactions Fractures Permeability Hydraulics Geochemistry Geothermal resources
出版年	2005
语种	英语
国家	United States
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=59ffc77631c97d1c3893d957
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/2XILL650/273325
推荐引用方式 GB/T 7714	Viani, B. E,Roberts, J. J,Detwiler, R. L,et al. Simulating Injectate/Rock Chemical Interaction in Fractured Desert Peak Quartz Monzonite.,2005.