...Time-frequency sparse Gabor transform for detecting microseismic events Hanh Bui*, Mauricio D. Sacchi, and Mirko van der Baan, University of Alberta Summary a function of time. Several studies have applied the TF analysis to detect microseismic events (Gabarda and Event detection is a challenging...

... with inclinations or pinch-outs. We exploit the advantages of the reversible jump Markov Chain Monte Carlo (rjMCMC) approach in generating different dimensions of velocity models and propose a transdimensional velocity optimization approach called incremental pseudo-master (IPM) method to improve microseismic event...

... The emerging fiber-optic DAS technology has revolutionized microseismic acquisition to a new level with unprecedentedly high spatial resolution and low deployment cost. Fiber-optic cables deployed in deviated boreholes enable observation of hydraulic-fracturing-related microseismic events...

... frequency applied geoscience microseismic data reservoir characterization sichuan basin chengdu university exploration geophysicist 10 reservoir geomechanics azimuth value microseismic event histogram fracture in-situ stress azimuth upstream oil & gas curvature horizontal...

... 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...

... Microseismic analysis is the primary tool available for fracture characterization in unconventional reservoirs. As DAS fibers are installed in the target reservoir and are thus close to the microseismic events, they hold vast potential for their high-resolution analysis. However, accurately...

... inversion. First, we apply the inversion on synthetic amplitudes and test different input parameters to find the best inversion scheme. Then, we perform the moment-tensor inversion on over 1000 microseismic events in a Montney reservoir, northeastern British Colombia (BC). The inversion results are compared...

... We show examples of rich microseismic events’ data acquired using fiber optic cables (DAS) during hydraulic fracturing in the Chalk Bluff Denver-Julesburg (DJ) basin in Colorado, US. DAS microseismic recordings contain signal of many different waves such as P- and S-direct waves, converted waves...

... reservoir characterization upstream oil & gas machine learning deep learning f1-score colorado school neural network accuracy microseismic event exploration geophysicist 10 dataset artificial intelligence applied geoscience convolutional neural network geophysics cnn eagle...

... It is very challenging to accurately invert for moment tensors of microseismic events recorded using a single-borehole geophone array. Full-waveform moment-tensor inversion uses the phase and amplitude of microseismic waveforms to invert for the moment tensor of a microseismic event...

...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...

...Microseismic event or noise: Automatic classification with convolutional neural networks Benjamin Consolvo*, Michael Thornton, MicroSeismic, Inc Summary et al., 2018). However, attribute-based studies can be very sensitive to noise, producing both false lows and false highs. Microseismic monitoring...

... microseismic event seg international exposition Microseismic reservoir imaging in the Permian Basin Vladimir Grechka, Zhao Li, Sainatha Yathams, Ramya Ravindranathan, and Denise Furtado (Borehole Seismic) Summary perceived as highly bene cial to companies operating in unconventional shale elds...

... Unconventional shale reservoirs can act as waveguides if their velocity is lower than their surroundings. Using DAS, we can record such guided waves as unaliased signals originating from both cross-well perforation shots and microseismic events. When S-type guided waves propagate through...

... 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...

... crosscorrelation workflow time pick workflow template event upstream oil & gas crosscorrelation time-pick workflow microseismic data seg international exposition hydraulic fracturing microseismic event arrival time migration-based method reservoir characterization...

... We present an analysis of guided waves generated by microseismic events in the low-velocity Eagle Ford shale. The relative strength of guided wave energy is used to qualitatively differentiate between events that are occurring inside and outside of the Eagle Ford. The dependence of guided wave...

... of the Eagle Ford formation. The combination of local microseismic events and the downhole DAS array provides a novel and cost-effective seismic survey strategy using guided waves to acquire valuable information about the structure of the unconventional reservoir. Monday, October 12, 2020 Session Start Time...

... upstream oil & gas reservoir characterization gmrtm source imaging seg international exposition artificial intelligence workflow source location nakata dataset source image imaging continuous data time window microseismic event velocity model Artman , B. , I...

... ABSTRACT Arrival-time picking is a fundamental step in processing of downhole microseismic events. Due to different signal-to-noise ratios of the events recorded in different time sections, conventional picking workflow may result in inconsistent problems. In order to eliminate...