... characterization table 1 inversion reflection overburden american association psdm moveout international applied geoscience traveltime value gaiser geophysical consulting figure 3 colorado school energy 10 Value of conventional PS-wave velocity analyses for PSDM of deep-water OBS data James...

... association walkaway vsp leaney vertical seismic profile applied geoscience inversion society figure traveltime upstream oil & gas exploration geophysicist receiver willow oilfield avo anisotropy international characterizing seismic anisotropy energy 10 conocophillips wavefield...

... expanded abstract traveltime excite Generalized internal multiple elimination Dongliang Zhang*1, Constantinos Tsingas1, Mohammed S Almubarak1, 1. EXPEC Advanced Research Center, Saudi Aramco Summary Correlation and convolution based internal multiple prediction is one of the most common methods...

... discontinuity international american association traveltime Revealing the discontinuities by 3D pre-stack diffraction separation and imaging Chuangjian Li*, Suping Peng, Xiaoqin Cui, and Peng Lin State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology (Beijing...

... geophysicist society american association energy 10 automation traveltime physics qc workflow detection savvaidis information figure 4 geophysical research Automation of passive seismic processing via machine learning and physics-informed methods Ivan Lim Chen Ning*, Laura Swafford, Mike Craven...

... present two applications of this physics-informed Bayesian inversion: VSP traveltime inversion and migration of passive seismic data. For 4D monitoring of hydrofrac operations, reuse of the previously computed traveltimes for probability estimates is orders-of-magnitude less expensive for computing...

.... If required, the CIP gathers of t * so mapped can be used in tomography to invert for more general Q models. reservoir characterization tomography traveltime mapping equation upstream oil & gas applied geoscience american association correspond society q-compensation migration...

... The density-based spatial clustering application with noise (DBSCAN) along with the super-virtual refraction interferometry (SVI) are used to pick the first arrivals’ traveltimes. DBSCAN alone suffers if the signal-to-noise ratio (SNR) of the data is poor. To overcome this drawback, SVI is used...

... apply this physics-informed Bayesian inversion to VSP traveltime data. The tomogram is computed with the assistance of an analytic inverse, and the posterior probability estimate is computed with an order-of-magnitude less cost than standard Bayesian analysis. This procedure can also be adapted...

... low-velocity resolution, especially, at the top 20 meters. In this work, we used land-streamer surveys to enhance the resolution of the velocity model at the top 20 meters by inverting the traveltime picks from both conventional and land-streamer surveys simultaneously, which keeps the advantages...

... First-arrival P-wave traveltimes play a crucial role in many geophysical applications such as migration and tomography. And the solution of Eikonal equation has been proven effective and accurate for approximating the traveltimes. Eikonal equation for attenuative case can provide not only...

... We present a tomographic deconvolution procedure for highresolution imaging of velocity anomalies between reflecting interfaces. The key idea is to first invert reflection or transmission traveltimes for the background velocity model. A convolutional neural network (CNN) model is then trained...

... 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...

... In real-time microseismic monitoring, the ability to efficiently compute source-receiver traveltimes can help in significantly speeding up the model calibration and hypocenter determination processes, thus ensuring timely information about the subsurface fractures for use in effective decision...

... source receiver pair pressure component velocity inversion kernel fresnel zone saudi arabia government receiver pair surface complexity amplitude reservoir characterization traveltime kernel applied geoscience wavefield exploration geophysicist 10 p-wave velocity Impacts of near surface...

...-depth curves extracted from the simulated DAS and geophone records produce comparable results. We further analyze the effect of DAS acquisition parameters and source offset on traveltimes and inverted velocities. We show the importance of using a small gauge length of 1-2 m for accurate characterization...

... geophones (natural frequency 5 HZ) to record the energy over a 5.2 km long profile. We have applied the Traveltime Tomography (TTT) of refracted phases to estimate the smooth shallow subsurface velocity-depth model. The Obtained 2D velocity model down to a depth of 400-500 m shows layered sediment in which...

... tomography, which limits the options for structural uncertainty estimation. We demonstrate the benefits of hierarchical transdimensional Bayesian first arrival tomography on an exploration-scale 2D scenario. Such a tomography yields multiple models of the near-surface that fit the observed traveltimes...

... The first-arrival traveltime tomography (FATT) is an inversion method which represents shallow velocities so that it is widely used to identify subsurface images in oil and gas industry as well as civil engineering and geotechnical industries. The provided shallow velocity can be generally...

... Traveltimes are essential for seismic applications ranging from imaging to tomography. Traveltime computations in anisotropic media, which are better representative of the true Earth, require solving the anisotropic eikonal equation. Numerical techniques to solve the anisotropic eikonal equation...