... Accurate traveltime estimation is essential in seismic and seismology applications, such as traveltime tomography and seismic imaging. When dealing with subsurface models with irregular topographies, unstructured triangular meshes often outperform Cartesian meshes when solving eikonal equations...

... reservoir surveillance das applied geoscience traveltime vertical seismic profile particle acceleration spectral ratio curve exploration geophysicist dataset geological subdiscipline discrepancy resolving das field research station particle velocity comparative study production control...

... of locallycoherent seismic events (LCEs). These LCEs are parametrized by the two-way traveltime and the horizontal component of slowness vectors at sources and receivers. The horizontal component of the slowness vector at sources and receivers are generally estimated by measuring the slope of the LCEs in both common...

... Traditional double-difference approaches for earthquake relocation are established based on a least-squares framework that enables the minimization of the observed and modeled traveltime difference between earthquake pairs by iteratively adjusting the locations and origin times of a cluster...

... flexibility and efficiency in generating Surface-Offset-binned common imaging Gathers (SOGs). However, traditional ray-based traveltime computation becomes less effective as it requires a smooth model. In this paper, we compute traveltime-tables for Kirchhoff depth migration using a full wave equation...

... The conventional adjoint-state reflection traveltime tomography (ASRT) method based on the Eikonal equation is limited with respect to two aspects: the first is automatically picking the reflection traveltimes in the prestack seismic data, and the other is determining and updating the reflector...

... for solving this problem, but it is often not accurate enough, especially for subsalt areas. We would also rather not smooth out the details that we built using FWI at great computational expense. Wave-equation traveltime Kirchhoff (WETK) computes its traveltimes by propagating low-frequency waves instead...

... reservoir characterization american 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...

... 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...

... upstream oil & gas machine learning refraction interferometry artificial intelligence interferometry algorithm dbscan traveltime accuracy enhancing amplitude correction reservoir characterization svi picking geophysics application supervirtual refraction interferometry snr...

... 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...

... 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...

... upstream oil & gas vertical seismic profile iteration inversion machine learning applied geoscience reservoir characterization traveltime international physics-informed bayesian inversion tian qiao procedure american association king abdullah university mcmc iteration...

... 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...

... is to use vertical traveltimes from Table 1. These traveltimes provide a means to compute tS0, vertical S-wave traveltime, from seabed to reflection horizon (not shown). Average VP0/VS0 is tS0/tP0=g 0 and interval VPint/VSint (blue box in Table 1) follows directly Second International Meeting for Applied...

... 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...

.... 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...

...-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...