... in the underground mine environment. AE measurements indicate that AE signal attenuation from fractures is more severe than due to backfill and in presence of fractures, backfill did not create a favorable environment for AE wave propagation toward receivers. AE signal arrival time to receivers mainly depends...

... characteristics towards signal receivers in laboratory physical models to understand the influence of various factors on seismic wave velocity. It was observed that the AE wave bypasses the voids and reflects off the backfill boundaries and follows the path of least resistance described by Fermat's principle...

... and the second for production. During the initial stimulation of well 16A(78)-32, the injection well at the Utah Frontier Observatory for Research in Geothermal Energy, an array of three downhole, high-temperature, eight-level digital receiver strings will be deployed to monitor the fracture system. The well has...

...) and low frequency strain (LF-DAS). Using a three-dimensional network of fibers during unconventional reservoir development we analyze the dual measurements taken from various vantage points. By using DAS receivers within vertical and horizontal well trajectories we do a full 3D MS mapping. The DAS MS...

... is a recurrent issue in the analysis of such data. Particular efforts are taken to account for this through beam modeling and the additional receiving transducers. The measurements are conducted on ‘dry’ jacketed samples to confining pressures of 180 MPa with no attempt at control pore pressure. For reference...

... receiver well logging Upstream Oil & Gas borehole data quality fracturing fluid relative signal strength geometry conductive proppant sea water conductivity resistivity fracture geometry configuration proppant distribution fracture society of petroleum engineers complex fracture...

...; density of observing system under underground conditions is small. Surface seismic methods are not sensitive to small anisotropic inclusions in the geological medium. The arrangement of sources and receivers in the coal seam ensures higher resolution. The seam is sounded by seismic waves at small...

... compressional wave upper bakken borehole middle Bakken well logging Upstream Oil & Gas shear wave transmitter Crossover waveform anisotropy receiver flexural dispersion curve acoustic data dispersion curve upper member wellbore slowness fracture ARMA 11-319 Using Advanced Acoustic Data...

... to determine the feasibility of identification of coal seams using an optimized wavelet as a drill-bit source. As an example, a hypothetical case is considered wherein the stratigraphic layers were assumed to be flat. Two source-receiver distances of 10m and 50m were considered. For an assumed wave-let source...

... and temporal changes during salt damage. This study used ultrasonic velocity measurements obtained from the rib (side) of the S-90 access drift, which was excavated in 1988, to assess the extent of the DRZ [2]. US government WIPP disposal room Upstream Oil & Gas rock salt receiver boundary...

... a 24-channel geophone array and source along a traverse oriented perpendicular to the center-line of the tunnel. The near source-receiver offsets were 3 & 6 m, respectively; the 4.5 Hz geophones were spaced at 0.5 m. The geophone array geometry was optimized for nominal tunnel depths and diameters...

... employed the Three-dimensional Reflector Tracing (TRT?) technique to enhance resolution of the ground images between neighboring panels. The technique uses a source and a set of receivers in the same borehole (Single- Hole TRT?) for detecting seismic waves reflected from anomalies in the ground due...

... Characterization Artificial Intelligence Upstream Oil & Gas TBM anomaly gravel bed Imaging site 1 ground condition reflectogram receiver velocity model boundary trt reflectogram data processing geological information seismic reflector construction reflection coefficient tunnel Hammer Source...

... stress state receiver investigation inversion compaction localization process shape change compression dataset focal mechanism deformation ARMA/USRMS 06­966 Investigation of the Compaction Localization Process in High­Porosity, Fluid­Saturated Sandstone Using Acoustic Emission Focal...

... ultrasonic wave path length receiver arrival time cross-hole measurement transmitter shear stress elastic wave velocity perpendicular Waste Isolation Pilot Plant Holcomb transducer lithology RockMechanicsin the NationalInterest,Elsworth,Tinucci& Heasley(eds), ¸ 2001 Swets& ZeitlingerLisse,ISBN...

... disposal was simulated using multiple small-volume injections over a three-day period, with long shut-in periods between the injections. Microseismic monitoring was achieved using a 5-level array of wall-locked, wireline-ran, triaxial- accelerometer receivers in a monitor well 76 m from the disposal well...

... improves interpretation. Reservoir Characterization log analysis well logging structural geology Upstream Oil & Gas Monterey Formation outcrop correlation maturity receiver core characterization application examination Probe jalama canyon diagenetic grade fracture potential...

...-space expressions for G and Ó can be used. Once the values of stress and displacement are known along S for a particular source location, the displacement can be evaluated for a receiver located anywhere in the medium. 2.2 Kirchhoff Approximation A problem with the BIEM approach is that for high...

... was gained by the headgate and tailgate roadways that run from the main entry into the mine to the longwall face. The gate roads are separated from the caved zone or gob by concrete packwalls fabricated during mining to support the roof. Figure 1 shows the geometry of the source and receiver locations...

... of P-waves at different receivers, have been used to identify those stopes with a higher probability of bump or burst activity. Adding to this analysis by correlating individual events with known geologic structures, identifying and mapping unknown structures within the rock mass, and determining...