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Keywords: tensor
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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-W6-03
... tensor to create a model segment on the unconformity surface for every magnetic anomaly on every line in the aeromagnetic survey. Because the tensor is a 3D spatial derivative of the magnetic field, it automatically reduces the influence of regional magnetic field changes to focus the inversion process...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3581527
..., an of the particle-velocity vector, a dot over a variable denotes elastic propagator for the underlying solid earth, and explic- the temporal derivative, i j is the second-order contravariant itly satisfy the correct boundary conditions at the bathymetric stress tensor, and f i is the contravariant body force per...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3595024
... affect these the matrix shear modulus and the volume fraction as well as physical properties the most. by the effective elastic tensor of the rock. To establish the relation between these characteristics and the microstructure Theory parameters we considered three types of isotropic models on the core...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583987
... of seismic strain with an absolute measurement offers a pathway to answer fundamental questions on the nature of hydraulic fracture propagation, such as the degree to which aseismic deformation (creep) is present in and around reservoirs during stimulation. upstream oil & gas tensor strain tensor...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584093
... the geometry of the seismogenic structures. In addition, we performed waveform moment tensor inversion to determine earthquakes’ source mechanism for our study area. Furthermore, the state of stress is determined by using stress inversion on the basis of the obtained source mechanism. As a result, five...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3589262
... and data interpretation. DAS seismic measures strain/strain-rate (a second order tensor) along the DAS cable compared to a vector velocity measurement from conventional 3C geophones. We developed a 3D finite-difference tilted-orthorhombic elastic modeling code with strain-rate output to simulate DAS...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594469
... It is very challenging to accurately invert for moment tensors of microseismic events recorded using a single-borehole geophone array. Full-waveform moment-tensor inversion uses the phase and amplitude of microseismic waveforms to invert for the moment tensor of a microseismic event...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3414547
... reservoir characterization cambridge university press hydraulic fracturing artificial intelligence microcrack machine learning upstream oil & gas tensor exploration geophysicist 10 green function rake angle equation seg international exposition blue solution geophone...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3399830
... Moment tensors of kinematically double-couple microseismic events triggered in anisotropic formations are known to exhibit non-double-couple focal mechanisms. Their weak anisotropy approximation reveals the combinations of anisotropy coefficients of vertically transversely isotropic focal...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3423985
... The data completion problem involves recovering missing seismic data from incomplete observations. 3D seismic data can be naturally arranged into an order-3 tensor with dimensions for time, offset, and gather number. Redundancy in the data leads to a low rank tensor. We apply low rank...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424228
... Start Time: 1:50 PM Presentation Time: 1:50 PM Location: Poster Station 7 Presentation Type: Poster upstream oil & gas sin 4 seg international exposition symmetry class reservoir characterization co 2 exploration geophysicist 10 expression orthotropic media tensor quasi p-wave...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428438
... hydraulic fracturing expanded abstract inversion monoclinic ray trace artificial intelligence chapman seg international exposition correction leaney nmo correction reservoir characterization tensor exploration geophysicist 10 seam phase 2 azimuth upstream oil & gas anisotropy...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427950
..., and requires the interpretation to account for the anisotropy to extract the maximum amount of information from the data. In this study, we examine the capability of magnetotelluric (MT) data to resolve the electrical conductivity tensor for each layer in a layered halfspace. We invert for a triaxially...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425808
... avoid applying 2019). Although this is an established approach, the solu- the constitutive relationship directly in generalized coordinates tion comes at a computational cost that is higher the Carte- and transform the second-rank strain tensor to Cartesian coor- sian EWE solutions due to an additional...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215431
... ABSTRACT The data completion problem involves recovering missing traces from an under-sampled observation. This problem can be solved using the tensor nuclear norm complexity measure and the alternating direction method of multipliers (ADMM) optimization algorithm. The computational cost...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214248
... mechanics. Revisiting this theoretical foundation, we discuss connections among existing theories that describe the variation of elastic moduli with effective stress. We show that there is a direct connection between predicting stress-induced elastic changes with the well known third-order elasticity tensor...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214690
... annual meeting migration image osa image reservoir characterization tensor synthetic aperture data Fan , Y. , R. Snieder , E. Slob , J. Hunziker , J. Singer , J. Sheiman , and M. Rosenquist , 2010 , Synthetic aperture controlled source...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214868
... study equation tensor reservoir characterization linear slip theory time delay upstream oil & gas p-wave speed media nonlinear interaction interaction Benson , P. , P. , Meredith , E. , Platzman , and R. , White , 2005 , Pore fabric shape anisotropy...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216551
...) approach solves the velocity-stress formulation of the tensorial elastic wave equation where we compute the stress-strain constitutive relationship in Cartesian coordinates and then transform the resulting stress tensor to generalized coordinates to solve the equations of motion. Our O (?; ?) numerical FD...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3203816
... anisotropic diffusion, we proposed a new method, based on an anisotropic tensor, to attenuate the RTM low-frequency artifacts. In the Laplace operator with an anisotropic tensor, we construct the diffusion tensor from the velocity model. Combining the new operator with the cross-correlation imaging condition...

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