1-20 of 173
Keywords: frequency
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1079
... and the method of characteristic. The BHPs during the PHF for different input frequencies ranging from 0.01 Hz to 20 Hz were calculated. In addition, the difference of BHP acting modes between the CHF and PHF was analyzed and illustrated. Results show that the BHP of the CHF is a constant pressure that smaller...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1409
... ABSTRACT: Acoustic measurements are vital for geomechanical applications to design safe mud weight window, estimating rock strength parameters, sand control, hydraulic fracturing, etc. There is usually a discrepancy between the ultrasonic lab and sonic log measurements due to the frequency...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1785
... ABSTRACT: For a harmonic wave of single frequency impinging on a fracture, the Pyrak-Nolte displacement discontinuity model (DDM) can be used to determine the reflection and transmission coefficients of the resultant harmonic waves. However, it is often the case in the field that a wave...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1390
... are analyzed in the time domain and frequency domain, show that the erosion mechanisms of the abrasive jet are quite different. The acoustic wave of Si shale is featured by the low amplitude. On the contrary, the acoustic wave of C shale is a high amplitude. This study provides a fundamental theory...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1920
... the spatial distribution of acoustic vibrations (DAS) or temperature (DTS) along the sensing fiber (Hartog, 2017). The low-frequency (< 0.05 Hz) component of DAS (LF-DAS) is a powerful tool to monitor small strain perturbations caused by hydraulic fracturing (Jin and Roy, 2017). The completion...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1630
... earthquakes. If the shear loading on rock discontinuities due to actual earthquakes is to be considered, the displacement response must be used as the frequencies of accelerations are extremely difficult to simulate in available equipments. However, as shown by Aydan and Ohta (2011) or Aydan et al. (2011...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2015
... data analytics and vibration modeling. A near-bit sub was utilized to collect vibration data, where the burst data was used to obtain the drillstring torsional natural frequency. The data showed that the highest lateral acceleration and stick-slip severities (SSS) occur at the higher mechanical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0120
... more than that for the specimens at room temperature. geothermal reservoir hdr specimen Loading Rate hydraulic fracturing heat-treated hdr specimen ae number AE event frequency fracture toughness Wang Upstream Oil & Gas SCB specimen fracture mechanics characteristic room...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0349
... Artificial Intelligence frequency characteristic microseismic event Reservoir Characterization Upstream Oil & Gas hazardous microseismicity probability event count spatial distribution microseismicity Magnitude Modeling & Simulation forecasting Velenje forecasted probability fracture...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0430
... are presented. Finally, simulation is conducted to verify the model. It is confirmed that the introduction of fractional viscosity term can better reflect the dynamic characteristics of the rock. The maximum vibration displacement of the rock can be obtained when the excitation frequency is appropriate...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1235
... front. The peak frequencies of drying events in samples with and without clay were greater than the peak frequencies of events generated by induced cracking. Overall analysis of the different geo-architected rocks shows that the presence of clay has a significant effect on the extent and location...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1103
... ABSTRACT: Temperature is one of several variables that can adversely impact the dynamic behavior of rocks by altering their geo-mechanical behavior. This study highlights the role of temperature changes on the measurement of resonance frequency (Fr) and quality factor (Q) parameters...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1228
..., for temperatures typically encountered in real life applications, e.g., when disturbed by extraction activities such as drilling or the introduction of fracking fluids. Reservoir Characterization frequency subsurface storage temperature-dependent elasticity Upstream Oil & Gas elasticity kHz...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-328
... the pore pressure will be. The elastic modulus and porosity have the same effects on the bottom rock. The higher the permeability of the rock, the faster the pore pressure drops down, which recommends an impact load with higher frequency. This study is instructive for understanding the variation of rock...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-812
... pore pressure enhancement flow in porous media permeable soil excitation reduction Blockage Reservoir Characterization Fluid Dynamics mechanism operation injection recharge permeability enhanced recovery Oil Recovery frequency particle application accumulation 1. INTRODUCTION Pore...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1434
... Slope Model landslide frequency displacement natural frequency table test dip slope Engineering weak plane critical acceleration Newmark slope angle accelerometer input excitation deformation Earthquake plane dip slope model 1. INTRODUCTION In recent years, numerous substantial...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-432
... on the elastic wave equation propagation theory and the superposition principle of the elastic theory, a numerical model for simulating the maximum tensile stress caused by pulsation stress in orthotropic coal rock is established. Then the effect of the coal rock orthotropic characteristics, amplitude, frequency...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-257
... ABSTRACT: The difference in stress magnitude during (quasi-)static rock compression (typically of the order of 10 -3 m/m), and acoustic-wave propagation (typically<10 -6 m/m); The frequency dependence of the rock stiffness (dispersion). In laboratory studies, acoustic velocities...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0483
... angles considering non welded interfaces in rocks. After validation with the ultrasonic pulse velocity tests, numerical models using UDEC were developed to simulate the wave propagation in jointed rocks. The numerical study was extended for multiple fractures over a range of ultra sonic frequencies...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0782
... to investigate the effects of the amplitude and the frequency of simple harmonic seismic loading on the horizontal and the lateral displacements of triangular prism, quadrangular prism, pentagonal prism and hexagonal prism. The results show the significant effects of seismic loading on the run-out distance...

Product(s) added to cart

Close Modal