干旱区生态环境知识资源中心(Arid): Fracture Permeability Evolution in Desert Peak Quartz Monzonite.

Arid

报告编号	DE2006877788
	Fracture Permeability Evolution in Desert Peak Quartz Monzonite.
	Carlson, S. R; Roberts, J. J; Detwiler, R. L; Viani, B. E; Roberts, S. K.
英文摘要	Fracture flow experiments are being conducted on quartz monzonite core from the Desert Peak East EGS site, Churchill County, Nevada. The flow experiments are conducted at temperatures of 167-169 C and 5.5 MPa confining pressure through artificial fractures. Two injection fluids, a saline solution and a silica-bearing solution, have been used to date. Flow rates are typically 0.02 mL/min, but other rates have been used. The fracture surfaces are characterized with a contact profilometer. The profilometry data demonstrate that it is possible to fabricate statistically similar fracture surfaces and enable us to map aperture variations, which we use in numerical simulations. Effluent samples are collected for chemical analysis. The fluid pressure gradient is measured across the specimen and effective hydraulic apertures are calculated. The experiments show a reduction in permeability over time for both injection fluids, but a more rapid loss of permeability was observed for the silica-bearing solution. The calculated hydraulic aperture is observed to decrease by 17% for the saline solution and 75% for the silica-bearing fluid, respectively. Electrical resistivity measurements, which are sensitive to the ionic content of the pore fluid, provide additional evidence of fluid-rock interactions.
英文关键词	Quartz monzonite Fracture permeability Flow rates Chemical analysis Permeability Hydraulics Electric conductivity Fractures Fluid-rock interactions Desert Peak site
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=59ffc77631c97d1c3893d968
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/2XILL650/273320
推荐引用方式 GB/T 7714	Carlson, S. R,Roberts, J. J,Detwiler, R. L,et al. Fracture Permeability Evolution in Desert Peak Quartz Monzonite.,2005.