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Keywords: arrival time
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2031
... ABSTRACT: Locating seismic events in the field and acoustic emissions (AE) in the lab provides vital information about the spatial evolution of cracks during rock fracturing processes. Seismological source localization techniques require picking the P-wave arrival time of the received...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0447
... tomographic inversion method, the velocity fields in synthetic and natural rocks were determined. Upstream Oil & Gas specimen sensor ultrasonic velocity tomography velocity tomogram Reservoir Characterization propagation Applicability arrival time loading tomography hedayat barre...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-217
... Alberta mechanical property constraint pzt wafer arrival time structural geology wavefront shale geophysics Upstream Oil & Gas symmetry axis stiffness pzt element waveform receiver anisotropy determination flat spot perpendicular 1. INTRODUCTION Shale is the most common rock...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0411
... that transmitted waves were not sensitive to shear crack initiation. Upstream Oil & Gas shear wave specimen wave conversion new crack Coalescence Reservoir Characterization s-to-p wave shear crack initiation arrival time flaw fracture loading crack coalescence displacement initiation...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-216
... a quadrupole mass spectrometer (QMS). Downstream detection under vacuum is possible by precise metering of the gas mixture through a leak valve with active feedback control. Arrival times and time-variant concentrations of the applied gases downstream are collected for comparison between samples. We intend...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-583
... ultrasonic waves propagating along a fracture intersection on the laboratory scale. upstream oil & gas group theory vibrational mode rayleigh arrival time specific stiffness polarization wedge wedge wave intersection wave velocity fracture experiment reservoir characterization...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-331
... cluster center identification positioning position result arrival time algorithm microseismic source k-mean algorithm positioning method STA LTA method Reservoir Characterization calculation optimized positioning method amplitude seismological society source position equation 1...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-581
... geomechanics pore pressure AE event arrival time undrained condition propagation labuz 1. INTRODUCTION The study of coupled effects of fluid flow and skeleton deformation in porous geomaterials is critical for proper assessment of underground structures. In fact, the presence of pore fluids can affect...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-476
... of small incremental charges, each scaled by the distance from the explosive source to the point of interest. In addition, every waveform is shifted in time from the difference of their respective arrival times as they arrive to the point of interest. As a result of these considerations, the proposed...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-082
... transmitter receiver damage criterion access drift WIPP disposal room boundary disposal room transducer rock salt arrival time excavation sandia national laboratory Waste Isolation Pilot Plant ARMA 09-82 Estimating the Extent of the Disturbed Rock Zone around a WIPP Disposal Room Herrick, C.G...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-330
... Thickness Upstream Oil & Gas layer thickness frequency wavelength arrival time dispersion curve fracture bead spherical bead Reservoir Characterization effective fracture stiffness bead size seismic response wave propagation single layer stiffness interference null 1. INTRODUCTION...
Proceedings Papers

Paper presented at the Alaska Rocks 2005, The 40th U.S. Symposium on Rock Mechanics (USRMS), June 25–29, 2005
Paper Number: ARMA-05-751
... transducer constant loading acoustic emission technique arrival time th sensor mechanics emission p-wave velocity 1. INTRODUCTION Acoustic emission (AE) is defined as the transient elastic wave generated by the rapid release of energy from a source within a material. Since acoustic emission...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0489
... plates affixed as a collar at the hole's entrance. 3 DATA ANALYSIS Calculating the velocity was a several step process in- volving transducer coordinate determination, correc- tions for various offsets and choosing the arrival time for the P or S wave at the receiver. No direct measure- ment of path...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0955
... independent of data from the macroseismic system. Figure 4 displays data from the program IASPEI XPLAY for the July 6 event (No. 89070600). Certain features should be noted. The relative times of P-wave arrival at each seismometer are clearly indicated. Component 280Z has an earlier arrival time than...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0939
... is developing methods for such quantitative characterization of deformation by studying a working hard-rock mine located in the Coeur D'Alene district of northern Idaho which has discontinuous geologic structure. Routine locations of microseismic events in the mine at different stopes, based on arrival times...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0655
... at known locations in the rock mass surrounding an area to be monitored. Microseismic event waveforms detected at the geophones are amplified, validated, and stored on a computer. A source location for each event is then determined through the relative arrival times of signals recorded on each channel...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0663
... is affected by many factors, such as the accuracy of transducer coordinates, the accuracy of arrival times, the size of transducer arrays, transducer array geometry, velocity model, and source location methods. Although the impact of these factors may vary from case to case it is in general recognized...
Proceedings Papers

Paper presented at the The 28th U.S. Symposium on Rock Mechanics (USRMS), June 29–July 1, 1987
Paper Number: ARMA-87-0019
... Imaging direct arrival rock mass arrival time collapse structure plane geometry Prairie Evaporite Thickness refraction travel time velocity zone geotomographic imaging dawson bay image plane interpretation collapse solution structure 28th US Symposium on Rock Mechanics / Tucson/29 June...

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