Improved Seismic Characterization Using Joint Inversion of Disparate Data Types
Abstract not provided.
Publications
Full waveform source inversions for SPE data: results challenges and lessons learned
Abstract not provided.
Imaging Fracture Networks Using Joint Seismic and Electrical Change Detection Techniques ? An Example Of Subsurface Imaging
Abstract not provided.
Underground imaging with muons
Abstract not provided.
SPE-5 Infrasound Predictions
Abstract not provided.
Geophysics Capabilities Brief
Abstract not provided.
High energy stimulations imaged with geophysical change detection techniques
Transactions - Geothermal Resources Council
During the initial phase of this Department of Energy (DOE) Geothermal Technologies Office (GTO) SubTER project, we conducted a series of high-energy stimulations in shallow wells, the effects of which were evaluated with high resolution seismic imaging campaigns designed to characterize induced fractures. The high-energy stimulations use a novel explosive source that limits damage to the borehole, which was paramount for change detection seismic imaging and re-fracturing experiments. This work provided evidence that the high-energy stimulations were generating self-propping fractures and that these fracture locations could be imaged at inch scales using high-frequency seismic tomography. While the seismic testing certainly provided valuable feedback on fracture generation for the suite of explosives, it left many fracture properties (i.e. permeability) unresolved. We present here the methodology for the second phase of the project, where we are developing and demonstrating emerging seismic and electrical geophysical imaging technologies that have been designed to characterize 1) the 3D extent and distribution of fractures stimulated from the explosive source, 2) 3D fluid transport within the stimulated fracture network through use of a contrasting tracer, and 3) fracture attributes through advanced data analysis. Focus is being placed upon advancing these technologies toward near real-time acquisition and processing in order to help provide the feedback mechanism necessary to understand and control fracture stimulation and fluid flow.
Imaging fracture networks using joint seismic and electrical change detection techniques
50th US Rock Mechanics / Geomechanics Symposium 2016
During the initial phase of this SubTER project, we conducted a series of high resolution seismic imaging campaigns designed to characterize induced fractures. Fractures were emplaced using a novel explosive source that limits damage to the borehole. This work provided evidence that fracture locations could be imaged at inch scales using high-frequency seismic tomography but left many fracture properties (i.e. permeability) unresolved. We present here the methodology for the second phase of the project, where we will develop and demonstrate emerging seismic and electrical geophysical imaging technologies that characterize 1) the 3D extent and distribution of fractures stimulated from the explosive source, 2) 3D fluid transport within the stimulated fracture network through use of a contrasting tracer, and 3) fracture attributes through advanced data analysis. Focus will be placed upon advancing these technologies toward near real-time acquisition and processing in order to help provide the feedback mechanism necessary to understand and control fracture stimulation and fluid flow.
Hammering Yucca Flat Part One: P-Wave Velocity
Abstract not provided.
Infrasound generation from the source physics experiments
Abstract not provided.
Modeling Seismoacoustic Propagation from the Nonlinear to Linear Regimes
Abstract not provided.
Imaging a vertical shaft from a tunnel using muons
Abstract not provided.
THOR I and II
Abstract not provided.
Imaging fracture networks using crosshole seismic logging and change detection techniques
Abstract not provided.
Underground imaging using muons
Abstract not provided.
Underground imaging with muons
Abstract not provided.
Muon Technology for Geophysical Applications
Abstract not provided.
Density Estimation Using Muon Imaging
Abstract not provided.
Density estimation using muon imaging
Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics
Muons are subatomic particles capable of penetrating the earth's crust several kilometers. Muons have been used to image the Pyramid of Khafre of Giza, various volcanoes, and smaller targets like cargo. For objects like a volcano, the detector is placed at the volcano's base and muon fluxes for paths through the volcano are recorded for many days to weeks.
Imaging the Subsurface with Upgoing Muons
Abstract not provided.
Calculating Surface Wave Dispersion using a Boundary Value Solver
Bulletin of the Seismological Society of America
Abstract not provided.
Seismic Attenuation Inversion with t* Using tstarTomog
Seismic attenuation is defined as the loss of the seismic wave amplitude as the wave propagates excluding losses strictly due to geometric spreading. Information gleaned from seismic waves can be utilized to solve for the attenuation properties of the earth. One method of solving for earth attenuation properties is called t*. This report will start by introducing the basic theory behind t* and delve into inverse theory as it pertains to how the algorithm called tstarTomog inverts for attenuation properties using t* observations. This report also describes how to use the tstarTomog package to go from observed data to a 3-D model of attenuation structure in the earth.
Imaging the Subsurface with Upgoing Muons
Abstract not provided.
Finite-difference numerical simulations of underground explosion cavity decoupling
Abstract not provided.
Evaluation of Seismic Efficiency of Hammer Sources
Proposed for publication in Seismological Research Letters.
Abstract not provided.
Results 101–125 of 136