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Keywords: variation
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3414427
... variations during time-lapse monitoring, as well as during fracking of these rocks. Theoretical simulations based on the inclusion-based differential effective medium theory confirm the experimental velocity-stress results. Note: This paper was accepted into the Technical Program but was not presented at...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3417839
... upstream oil & gas compliance seg international exposition fracture characterization variation coefficient azimuth multiple vertical fracture seismic data random noise inversion kachanov reservoir characterization sayer exploration geophysicist 10 fracture Natural...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418232
... reservoir characterization illumination sandstone seg international exposition gas-saturated sand scenario variation porosity exploration geophysicist 10 elastic model upstream oil & gas shale host rock seismic modeling sand intrusion seismic response shale geometry intrusion...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3399580
..., we compare observed shots with simulated data over simple, yet representative seismic models of permafrost. Most of the arrivals found in the seismic shots of the Beaufort Sea dataset can be explained by the interaction of high velocity layers and the free surface, lateral velocity variations and...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426489
... velocity changes in the near-surface due to pore-pressure variations caused by rainfall and atmospheric pressure changes. This study paves the way to reservoir monitoring applications, especially for ground water resources management. Presentation date: Wednesday, October 14, 2020 Session Start Time: 1...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426612
... In the presence of aligned fractures both the kinematic and the dynamic parameters of a seismic wavefield are directionally dependent, so the medium behaves anisotropically. Hence, the study of P-wave velocity variation, travel-time or P-wave amplitude as function of direction is essential to...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427310
... Presentation Type: Oral log analysis fwi method acoustic logging data exploration geophysicist 10 well logging variation national university seg international exposition upstream oil & gas borehole velocity model inversion reservoir characterization acoustic full-waveform inversion...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425401
... Seismic wave induced fluid flow between mesoscale fractures and background pores is an important reason for seismic wave dispersion and attenuation in fracture reservoirs. Velocity dispersion and attenuation will have an important impact on the AVO (amplitude versus offset variations...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426023
... period and analyze the velocity variations across depth, time, temperature, and pressure. The results suggest that this reverberation is caused by poor coupling between the cable and the well-casing, and the reverberations provide useful information to measure the time-lapse changes of the observation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426339
... surface azimuthal anisotropy analysis exploration geophysicist 10 time difference azimuthal anisotropy upstream oil & gas delay time travel time maximum velocity formula seg international exposition azimuth anisotropy reservoir characterization variation arrival traveltime...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427092
... interface-fitting tetrahedral (3D) or triangular (2D) meshes that can match local variations of heterogeneous medium properties. Here we use the DG method as forward modeling engine of acoustic FWI, establishing an acoustic DGFWI workflow for land data from areas of strong topography changes. We apply the...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427114
... spectrogram seg international exposition metals & mining imaging seismic interferometry receiver position upstream oil & gas variation operation coherent event curvelet transform field operation exploration geophysicist 10 drilling virtual-source response western australia Impact of...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424692
... field experiments demonstrate that variation of seismic velocity of the crust could be identified with high accuracy (~0.01 %). To monitor the localized reservoir in higher spatial resolution, we recorded the monitoring data using DAS. Using the DAS, we succeeded to identify the temporal variation of...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427803
... reservoir characterization gabor transform variation workflow upstream oil & gas seismic data cfs method geophysics oilfield anomaly high attenuation anomaly attenuation mechanism bouchaala exploration geophysicist 10 obc receiver data acquired seg international exposition...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427832
... P-wave Velocity-Variation-versus-Azimuth (VVAZ) is commonly used to detect, and invert for, fracture parameters in 3-D seismic data. VVAZ analysis has shown mixed success particularly when the anisotropic intervals are thin, spatially localized, and when the anisotropy is weak, and/or the...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428127
... Time-lapse seismic surface-wave surveys successfully estimated shear-wave velocity (Vs) variations in a laboratory test box using a physical model designed to simulate void roof failure and migration to the ground surface. A trapdoor simulating the roof of a void, moved vertically downward while...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428138
... for effective porosity and Nuclear Magnetic Resonance (NMR) for fluid content, type and total porosity. In this way we obtain pressure dependent anisotropic elastic moduli. This allows us to fit compressional and shear wave velocities, predict porosity variations with confining pressure and estimate...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428139
... geological time variations. Each fault block can be computed independently and therefore complex geometries can be modelled such as reverse faults. Compare to other approaches requiring a transformation into a depositional space, the geological model is directly computed in the seismic domain. This model...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427597
...: Wednesday, October 14, 2020 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: Poster Station 11 Presentation Type: Poster central santos basin multi-azimuth variation exploration geophysicist 10 reservoir characterization cip tomography illumination seg international...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427608
... The crucial parameter for modeling the subsurface geothermal gradient and creating a heat flow map is the thermal conductivity. The lateral variation of thermal conductivity data from cores is rare, giving rise to the need to apply an indirect method to estimate the thermal conductivity. Seismic...

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