Spectral estimation—What is new? What is next?
Spectral estimation, and corresponding time‐frequency representation for nonstationary
signals, is a cornerstone in geophysical signal processing and interpretation. The last 10–15 …
signals, is a cornerstone in geophysical signal processing and interpretation. The last 10–15 …
Modeling of resistivity and acoustic borehole logging measurements using finite element methods
Modeling of Resistivity and Acoustic Borehole Logging Measurements Using Finite Element
Methods provides a comprehensive review of different resistivity and sonic logging …
Methods provides a comprehensive review of different resistivity and sonic logging …
Quasi‐static finite element modeling of seismic attenuation and dispersion due to wave‐induced fluid flow in poroelastic media
The finite element method is used to solve Biot's equations of consolidation in the
displacement‐pressure (u− p) formulation. We compute one‐dimensional (1‐D) and two …
displacement‐pressure (u− p) formulation. We compute one‐dimensional (1‐D) and two …
A simple hydromechanical approach for simulating squirt-type flow
The deformations caused by an acoustic wavefield in subsurface rock can induce fluid flow
within hydraulically interconnected mesoscopic fractures, from one fracture into the other …
within hydraulically interconnected mesoscopic fractures, from one fracture into the other …
Vibrational modes of hydraulic fractures: Inference of fracture geometry from resonant frequencies and attenuation
Oscillatory seismic signals arising from resonant vibrations of hydraulic fractures are
observed in many geologic systems, including volcanoes, glaciers and ice sheets, and …
observed in many geologic systems, including volcanoes, glaciers and ice sheets, and …
Hydraulic fracture diagnostics from Krauklis-wave resonance and tube-wave reflections
Fluid-filled fractures support guided waves known as Krauklis waves. The resonance of
Krauklis waves within fractures occurs at specific frequencies; these frequencies, and the …
Krauklis waves within fractures occurs at specific frequencies; these frequencies, and the …
Interpretation of resonance frequencies recorded during hydraulic fracturing treatments
Hydraulic fracturing treatments are often monitored by strings of geophones deployed in
boreholes. Instead of picking discrete events only, we here use time‐frequency …
boreholes. Instead of picking discrete events only, we here use time‐frequency …
Krauklis wave initiation in fluid-filled fractures by seismic body waves
M Frehner - Geophysics, 2014 - library.seg.org
Krauklis waves are a special wave mode that is bound to and propagates along fluid-filled
fractures. They can repeatedly propagate back and forth along a fracture and eventually fall …
fractures. They can repeatedly propagate back and forth along a fracture and eventually fall …
Experimental identification of the transition from elasticity to inelasticity from ultrasonic attenuation analyses
The transition from recoverable elastic to permanent inelastic deformation is marked by the
onset of fracturing in the brittle field. Detection of this transition in materials is crucial to …
onset of fracturing in the brittle field. Detection of this transition in materials is crucial to …
Map** faults in the laboratory with seismic scattering 2: The modelling perspective
Peak delays of acoustic emission (AE) data from rock deformation laboratory experiments
are sensitive to both sample heterogeneities and deformation-induced impedance contrasts …
are sensitive to both sample heterogeneities and deformation-induced impedance contrasts …