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Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3087
... the theory of how to modify the parameters to achieve the best accuracy. We perform the accuracy analysis of reflection and transmission coefficients and find the modification which provides the second order accuracy versus grid size for planar fluid-elastic and elastic interfaces parallel to the grid. Two...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3564832
... the dimensionality of the problem. Using local solvers, we can reduce the size of the computational domain to small areas while preserving the fidelity of the elastic wavefield reconstruction. Both the full waveform and extracted amplitudes and phases from seismic reflections are used in geophysical inversions...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3410057
... Correctly injecting recorded multicomponent seismic data to generate receiver-side wavefield is a major step in elastic reverse time migration (RTM). In land reflection survey, the data are often recorded at the free surface where the traction free condition is naturally maintained. Based...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428395
... We combine two inversion techniques to achieve an accurate wave-equation-based elastic-parameter estimation workflow using pressure data. We first apply full-waveform inversion by model extension (FWIME), a robust model-building technique, which provides an accurate migration velocity so...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215341
... ABSTRACT In this paper, the Fourier Coefficients (FCs) expression of azimuthally anisotropic elastic impedance (EI) equation is derived, a three-step workflow is proposed to simultaneously estimate P-wave impedance, S-wave impedance and fracture weaknesses parameters. The first step...
Proceedings Papers

Paper presented at the 1983 SEG Annual Meeting, September 11–15, 1983
Paper Number: SEG-1983-0254
... ABSTRACT No preview is available for this paper. reflection refraction approximation elliptical velocity dependence equivalent force diffraction rayleigh different part point source polar axis lobe wavelength upstream oil & gas incidence refraction elastic wave...
Proceedings Papers

Paper presented at the 1983 SEG Annual Meeting, September 11–15, 1983
Paper Number: SEG-1983-0256
... ABSTRACT No preview is available for this paper. reservoir characterization elastic inclusion rayleigh interference factor dynamical variable circular disc vibrator characteristic upstream oil & gas partition sv wave lobe displacement transition zone elastic wave ice...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17431305
...Elastic least-squares reverse time migration via linearized elastic full waveform inversion with pseudo-Hessian preconditioning Ke Chen and Mauricio D. Sacchi, University of Alberta SUMMARY Time domain elastic least-squares reverse time migration (LSRTM) is formulated as a linearized elastic full...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5819774
...Inversion of elastic parameters based on ray-path elastic impedance theory and its application in the prediction of tight sand reservoirs Duan Yushun, Wang Peng*, Wang Shicheng, Han Wei, Wang Juan, and Hao Fuzeng, BGP, CNPC Abstract Compared with elastic impedance (EI), ray-path elastic impedance...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1158
... porous media by equivalent visco-elastic solids. In this work, we solve Biot’s equations of motion to perform numerical simulations of seismic wave propagation through porous media containing mesoscopic heterogeneities. We then use an upscaling procedure to replace the heterogeneous poro-elastic regions...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-2762
... ABSTRACT A new algorithm is proposed here to extract elastic parameters from elastic impedance (EI) by using linearized Bayesian theory. Rock physics relations are also included as priori information and used to constrain the inversion process. Test on synthetic data shows that all parameters...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-389
... ABSTRACT Laboratory tests on dry outcrop and artificial sandstone indicate that non-elastic deformation appears quickly upon loading from the forming state or a turning point on the stress path. Upon further loading the non-elastic part of the deformation may increase or decrease depending...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-2799
... Summary We use the synthetic elastic Marmousi-II ocean bottom cable (OBC) dataset to compare the results from elastic reverse-time migration (RTM) and acoustic RTM. We applied acoustic RTM to the pressure data and applied elastic RTM to the horizontal and vertical particle velocity data...
Proceedings Papers

Paper presented at the 8th European Formation Damage Conference, May 27–29, 2009
Paper Number: SPE-122180-MS
... to inject large amount of water in dolomites. All these projects were preceded by a fracture growth analysis. Usually, these analyses are carried-out by using simulators which are based in Linear Elastic Fracture Model theory (LEFM) and consider a single planar fracture. However, in the case of IAFP in non...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-1908
... Hessian matrix, the pseudo-Hessian matrix has a limitation to scale the gradient of misfit function compared to the approximate Hessian matrix. To validate the new pseudo- Hessian matrix, we perform frequency-domain elastic full waveform inversion using this Hessian matrix. By synthetic experiments, we...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16731-MS
... Abstract The concept of Elastic Inversion (EI) has been generally accepted over the last few years in the exploration and production environment. EI reconstructs elastic attributes, such as Poisson's ratio, V p /V s ratio and other attributes using angle stack AVO data. This paper discusses...
Proceedings Papers

Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-0204
... Summary In this paper we first incorporate quality factors (Q p and Qs) into elastic thin-slab propagators, which is a fast one-way elastic propagator, using complex velocities to specify intrinsic attenuation effects for elastic wave modeling in visco-elastic media. The accuracy of the Q...
Proceedings Papers

Paper presented at the 20th U.S. Symposium on Rock Mechanics (USRMS), June 4–6, 1979
Paper Number: ARMA-79-0541
... ABSTRACT: Comparisons of finite element analyses of "cave" zone growth with longwall face advance using elastic-plastic and elastic-brittle material descriptions show some differences in cave zone extent, but the differences are not large relative to the loads on wood cribs used for support...
Proceedings Papers

Paper presented at the 1st ISRM Congress, September 25–October 1, 1966
Paper Number: ISRM-1CONGRESS-1966-046
... Summary The so-called borehole-method and the pressure chamber method have been adopted recently to estimate the in-situ elastic modulus of the foundation rock by measuring the deformation of the bored hole or the chamber subjected to internal pressure. In these method, the foundation rock has...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 15–18, 2021
Paper Number: SPE-208090-MS
..., and interpretation to model the stratigraphic/structural framework and link it with reservoir characterization. Hence, ADNOC decided to conduct a trial on state-of-art technique Litho-Petro-Elastic (LPE) AVA Inversion to mitigate the seismic interpretation challenges and delineate the reservoirs. The LPE AVA...

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