... to obtain just PP and PS reflections. In this work real data from a conventional 3C survey, were used to explore the possibility of using SS reflections. From arrival time estimation of reflections based on velocity from well-logs, it was found that SS -waves arrive embedded inside the ground roll...

... conventional method artificial intelligence velocity structure microseismic event arrival time event location location accuracy perforation shot velocity optimization machine learning optimization problem exploration geophysicist 10 applied geoscience location method velocity model ipm method...

...- the method utilizes only the P-wave arrival times instead of full posed by Vinard et al. (2020), who investigated the use of the waveforms. Second, instead of relying on historical training CNN on synthetic data in the context of improvement of the data, the neural network is trained on synthetically...

... We present a numerical method for computing the first arrival time of seismic waves. The scheme can tackle 3D media with elastic properties defined by a fully anisotropic Hooke tensor. Our numerical method proceeds in a single pass over the domain, similar to the Fast Marching method, and achieves...

... Using migration-based methods, we developed a workflow to obtain high-quality time picks for microseismic event data. The workflow crosscorrelates manually picked waveforms of template microseismic events with waveforms from the remaining events to refine the first arrival time picks of P and S...

... wave first arrival times over the course of several inversion (Figures 5a and 5d). The earth model served as a framework iterations. for inversion (using traveltime picks) based on the current seismic baseline dataset. Figure 5. (a), (d) Velocity logs acquired in Observation Wells Figure 6...

... 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...

... transversely isotropic (VTI) media. Different from the double-difference (DD) method, the CDD method uses the traveltime difference between the P-wave arrival time of one event and the S-wave arrival time of another event. Compared to the DD method, the CDD method contains more absolute information, which...

... ABSTRACT The accuracy of arrival time picking yields valuable information for applied geophysics and seismology. Arrival time picking uncertainties are used to weigh the data in inversion algorithms and to define the resolution of reconstructed velocity models. Arrival time uncertainties...

... of traditional survey configurations. The initial results and baseline processing solution involved industry standard proven techniques where traveltime variances between a modeled output and measured refracted P wave direct arrival time through the entire velocity field are analyzed. To fully exploit...

... that the IPDI-based method and prototype instrumentation are effective for detecting cavities beneath pile. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 8:30 AM Presentation Time: 11:25 AM Location: 217C Presentation Type: Oral cavity arrival time seg international exposition...

... picking automatic picking method sub image convolutional layer arrival time seismic data input data borehole seismic data segmentation convolutional network image segmentation machine learning reservoir characterization artificial intelligence upstream oil & gas deep learning sta lta...

...: Tuesday, September 17, 2019 Session Start Time: 8:30 AM Presentation Start Time: 11:25 AM Location: 301B Presentation Type: Oral shot gather contour upstream oil & gas bedrock seg 10 deposit arrival time annual meeting wave analysis refraction geophysics shallow bedrock site...

... arrival times and model-based arrival angles and compare the results with the salt shape in the model. Sediment proximity imaging tests of salt boundary with Kirchhoff migration using synthetic DAS data are encouraging. Both migration imaging results of the salt boundary and the salt entry points derived...

... ABSTRACT A LSTM network was used to automatically pick the arrival times of P- and S-waves. The network picks events accurately and quickly, obviating the need for human intervention. Although the LSTM was trained to detect small, local earthquakes in an onshore fold-thrust belt...

... ABSTRACT It is standard practice in land seismic processing to correct for time delays caused by low-velocity weathered layers in the near surface. Typically the first step is to pick the first arrival times of the refracting energy. But first arrivals are often noisy due to, for example...

... ABSTRACT With the development of deep learning techniques, researchers have studied some deep neural network models for auto-picking the polarization phase and the corresponding arrival time of events. However, the previous models need three component seismograms for the phase classification...

... processed the waveforms from perforation shots so that SV-wave arrival times can be picked in addition to Pand SH-wave arrival times. This makes the inversion wellconstrained by reducing the number of model parameters while increasing the number of observations. We applied both Maximum A posteriori (MAP...

... annual meeting vibration identify oil bearing reservoir seismogram correspond seg international exposition three-component receiver information seismic technology western siberia arrival time time profile reservoir deposit Use of 3C 2D seismic technology to identify oil-bearing reservoirs...

... and surface wave phase arrival times are picked, and surface wave velocities are inverted using a ray theoretical tomographic approach. A good agreement is found between the inverted results and the original model. In another model, a thin fault zone is detected. Agreement between the tomographic results...