Crack-induced anisotropy models in The Geysers geothermal field
نویسندگان
چکیده
منابع مشابه
Stress and Fracture Orientation in the Northwest Geysers Geothermal Field
A dataset comprised of 3946 well-located and wellconstrained earthquake focal plane mechanisms recorded in the Northwest Geysers geothermal field during the period of Jan 2005 – May 2012 was used to determine stress orientations and relative magnitudes at fine scale. The stress inversions were organized into gridblocks of varying size using a three-dimensional oct-tree gridding algorithm in whi...
متن کاملThree-dimensional Compressional- and Shear-wave Seismic Velocity Models for the Southeast Geysers Geothermal Field, California
Three-dimensional compressionaland shear-wave velocity (“Vp” and “Vs,” respectively) structure is obtained for the SE Geysers geothermal area from microearthquake arrival-time data. The results indicate a region of high Vp and high Vs in the northwest portion of the area studied, and a low value of VpNs at depths corresponding to the upper part of the steam reservoir. The Vp and Vs anomalies ar...
متن کاملThe Stress State of the Northwest Geysers, California Geothermal Field, and Implications for Fault-Controlled Fluid Flow
A dataset comprised of well-constrained focal mechanisms for 6147 earthquakes recorded in the northwest Geysers geothermal field during the period of 2005–2012 was utilized to conduct a detailed stress study within and below the geothermal reservoir. The high-quality focal mechanisms were organized into grid blocks of varying size using a 3D octree gridding algorithm in which discretization was...
متن کاملDetermining the 3-D F’racture Structure in the Geysers Geothermal Reservoir
In t roduc t ion The bulk of the steam a t the Geysers geothermal field is produced from fractures in a. relatively impermeable graywacke massif which has lieen heated by an underlying felsite intrusion. The largest of these fractures are steeply dipping right lateral strike-slip faults which are subparallel to the N W striking Clollayomi and Mercuryville faults which form t,lie NE and SW bound...
متن کاملAnisotropy in wavelet based phase field models
Anisotropy is an essential feature of phase-field models, in particular when describing the evolution of microstructures in solids. The symmetries of the crystalline phases are reflected in the interfacial energy by introducing corresponding directional dependencies in the gradient energy coefficients, which multiply the highest order derivative in the phase-field model. This paper instead cons...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2005
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2005.02697.x