... The velocity model in downhole microseismic monitoring plays a vital role in accurate mapping of the hydraulic fracturing image, but the conventional velocity optimization method by the perforation shot introduces non-negligible event location errors when the geological formations are complex...

... Single-well microseismic monitoring is a cost-effective option when considering downhole microseismic monitoring of hydraulic treatments et al. in nearby wells. We study the feasibility of a 1C Distributed Acoustic Sensing– 3C geophone hybrid configuration in terms of the event location problem...

... machine learning deep learning ann location reservoir characterization upstream oil & gas microseismic event neural network accuracy artificial intelligence applied geoscience earthquake arrival time event location traveltime eisner p-wave arrival time dataset velocity model...

...Joint microseismic event location with surface geophones and downhole DAS at the FORGE geother- mal site Gary Binder* and Zagid Abatchev, Automated Seismics LLC SUMMARY has the disadvantage that it only measures one axial compo- nent of strain along the ber optic cable, and thus polarization All...

... time imaging (RTI) for determining microseismic event locations. RTI is based on the reversibility of the wave equations. It propagates the recorded microseismic events back to their source locations. We apply elastic RTI to locate microseismic events in three stages of a hydraulic fracturing treatment...

...Bayesian inversion for elastic properties and microseismic event locations in HTI media: A physical modeling study Hongliang Zhang*, Jan Dettmer, Joe Wong, and Kristopher A. Innanen, Department of Geoscience, University of Calgary SUMMARY tomography to invert for both VTI parameters and event...

... We present a case study from the West Texas Permian Basin of constraining anisotropic velocity and improving microseismic event locations by using microseismic shear-wave splitting data (SH-wave arrival is earlier than Sv-wave arrival). There are 2 downhole arrays with 12 geophones in each array...

..., recorded seismic signals were very complex to This permanent deployment consisted of 15 levels of analyse, with refracted and reflected waves combining with geophones, with 40m spacing, with tools located above, direct arrivals. Seismic events location remains then a major below and in the reservoir...

... for seismic anisotropy may cause enormous errors in microseismic event location for shale formations. In this paper, we first analyze the influence of anisotropy on location results by using numerical simulation, and then propose an improved iterative Geiger’s method by considering velocity anisotropy...

... ABSTRACT The velocity model and the distribution of the microseismic events contribute to understanding the hydraulic fracturing processes. We invert the event locations and the five Thomsen parameters simultaneously with the cross doubledifference (CDD) method in vertically layered...

... Start Time: 1:50 PM Presentation Start Time: 3:30 PM Location: 301B Presentation Type: Oral borehole sensor injection seg international exposition upstream oil & gas event cluster co 2 different waveform characteristic constraint decatur cc site event location reservoir...

... Location: 217B Presentation Type: Oral event location attenuation tomography correlation metals & mining microseismicity corner frequency upstream oil & gas annual meeting spectra van der baan spectral fitting inversion seg international exposition barthwal reservoir...

... the likelihood of fault reactivation based on their orientations and spatial locations with respect to the mine layout. Results show that the fault inferred from the microseismic event locations near the 480 m tunnel network and the main shaft is well oriented for reactivation. However, the static stresses...

... velocity model upstream oil & gas receiver origin time evolutionary algorithm event location seg international exposition application thomsen parameter optimization problem tensor annual meeting artificial intelligence machine learning Chapman , C. , and W. Leaney...

... upstream oil & gas microseismic activity co2 injection reservoir characterization magnitude event greenhouse gas control seismicity locatable event event location microseismic monitoring energy conservation Goertz-Allmann , B. , S. Gibbons , V. Oye , R. Bauer...

... monitoring. Compared to vendor?s fixed isotropic velocity model results, we not only improved microseismic event locations, but also updated anisotropic velocity model. The mean of arrival time residuals has been reduced by 40%, which implies more accurate event locations, thus can help optimize well...

... information event location annual meeting likelihood Cipolla , C. , S. Maxwell , M. Mack , R. Downie , 2011 , A practical guide to interpreting microseismic measurements : SPE North American Unconventional Gas Conference and Exhibition , 10.2118/144067-ms...

... network. We expect that the location neural network extract the relationship between the waveform feature and the event location, and predict the locations for the truncated waveforms from the detection neural network. We construct an automatic processing scheme by combining the detection and location...

... ABSTRACT Waveform inversion (WI), which has been extensively used in reflection seismology, could provide improved velocity models and event locations for microseismic surveys. Here we present an elastic, anisotropic WI algorithm for microseismic data designed to estimate the 3D velocity field...

..., we analyzed seismic data in the Permian basin from the USArray Transportable Array and located 126 micro-earthquakes during March 2009 to February 2010. The event locations form two clusters and several linear trends in NW-SE direction and agree with the faults in the area, indicating that micro...