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Keywords: travel time
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0112
... ABSTRACT: We measure acoustic travel-times in Green River shale both parallel and perpendicular to bedding to observe the effects on petrophysical properties of interactions with water (fracture fluids) for different durations. X-ray diffraction shows the samples dominantly comprise carbonate...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-744
... mathematical model neural network bulk density Exhibition functional network travel time Mahmoud s-wave travel time prediction application static poisson society of petroleum engineers 1. INTRODUCTION Elasticity is the material property which tends to oppose deformation in shape and volume. Hooke...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0037
... silver mine in northern Idaho. Travel times of several events with relatively well-known locations, as determined by an in-mine network, were modeled using the fast marching method. The Nelder-Mead simplex method was then employed, in conjunction with global Monte Carlo sampling, to determine a suitable...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0301
... a rigorous empirical correlations based on the weights and biases of Artificial Neural Network to predict sonic logs (compressional and shear wave travel times), elastic parameters (static Young’s modulus and Poisson’s ratio) and failure parameter (Unconfined compressive strength).The testing of new...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0409
... Upstream Oil & Gas shear wave response Reservoir Characterization crack density damani microseismic event polarization wave travel time shear velocity shear wave travel time secondary fracture main fracture transducer shear wave velocity fracture propagation propagation fracture...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0890
... to avoid hazardous situations. Reservoir Characterization seismic tomography stress state travel time stope variation tomographic inversion sill pillar stress variation Upstream Oil & Gas Imaging geometry rock mass velocity structure tomographic imaging tomography extraction...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-149
... locations, suggesting an LVZ is influencing the locations. A parametric study using NonLinLoc was conducted to estimate the LVZ around the mine workings. The LVZ was applied in a time-varying manner to evaluate the resulting effects on the event locations. The best model according to travel-time root-mean...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-801
... Abstract Subsurface pressure and temperature variations can alter rock properties both near and relatively far from the disturbance, causing detectable changes in seismic travel times. In modelling such phenomena, we employ large-scale geomechanical simulations to translate reservoir...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-676
... Oil & Gas moduli heavy oil steam chamber seismic velocity seismic property thermal method SAGD s-wave travel time simulator travel time proceedings saturation Oil Recovery SAGD process numerical model permeability injection 1. INTRODUCTION Enhanced thermal recovery processes...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-589
... impacting productivity. In order to implement passive seismic velocity tomography three methods of tomographic inversion are explored to determine which method provides the most consistent and meaningful results. Upstream Oil & Gas Simulp travel time Reservoir Characterization seismic...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-287
.... Repeated seismic soundings of the seam allow us to reveal such unstable sections by disturbances of wave travel times. The calculated relations and results of numerical experiments carried out with the use of transversally isotropic model for the fractured zones of coal seam are presented. The areas...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-447
... porosity travel time ARSL drilling data Onyia Upstream Oil & Gas correlation rock strength Drilling lithology sonic travel time 1. INTRODUCTION It is well known throughout the oil and gas industry that drilling costs have always been a major part of field development expenses. Optimization...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-406
... represented as a simplified wave velocity model. There are two basic approaches for travel time estimation: raytracing and wave-front tracking. The former method uses high frequency ray approximation of the wave equation solution [1], while the latter employs various techniques to obtain a numerical solution...
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-09-045
... of piezoelectric sensors that generate and receive high frequency acoustic waves. We measure the travel times of the acoustic waves through a specimen and then use a commercially available tomography software package to invert the data. The inverted velocity model is in turn used to locate the voids within...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-123
... and water-filled void conditions. US government Reservoir Characterization metals & mining Imaging cross hole shot record void detection demonstration travel time borehole mined-out area Upstream Oil & Gas bulkhead cross hole seismic tomography investigation elevation void...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0965
... the shaft wall, but there was considerable scatter in the data largely due to difficulty in determining the path lengths ac- curately. With the availability of a complete set of arrival times and 4 more years of data the picture has changed. We can now plot the entire time sequence of travel times between...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-1087
... Upstream Oil & Gas metals & mining lucky friday Reservoir Characterization mechanism instrument all-dilatational event seismogram seismograph seismicity Galena Fault Plane Solution hypocenter location mining district travel time Idaho microseismic study velocity model...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0319
... of controlled blasts within limestone and dolomite rock near Austin, TX. Indicators investigated are compression (P-) and shear (S-) wave travel times, first peak and maximum amplitudes, first arrival rise rate, and the linear spectrum of the received signal. Compression wave travel time yielded the most...
Proceedings Papers

Paper presented at the The 29th U.S. Symposium on Rock Mechanics (USRMS), June 13–15, 1988
Paper Number: ARMA-88-0633
...) after mining. 3 RESULTS Results for the permanent transducers in holes #3085, 3086 and 3087 are shown in Figure 2. Travel times are given instead of velocities since the exact positions of the hole ends were not known. As a measure of attenuation, the peak to peak amplitude in millivolts...
Proceedings Papers

Paper presented at the The 28th U.S. Symposium on Rock Mechanics (USRMS), June 29–July 1, 1987
Paper Number: ARMA-87-0047
... velocity, Cef f, which depends on frequency and fracture stiffness, can be determined for a rock containing a fracture assuming no dispersion i the intact part of the rock or from multiple reflections. The effective group travel time, tel f, for a wave passing through arock with a fracture is t z(tz) rex...

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