Results 71 to 80 of about 600,749 (229)

Enhanced Hardrock Seismic Imaging Through Multi‐Scale Information‐Guided Unsupervised Learning

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 2, June 2025.
Abstract In hardrock or crystalline rock geological settings, due to low impedance contrast, reflected energy is usually weak. In addition, often stronger surface waves and noncoherent noise are observed including high‐frequency scattering noise, which seriously covers the useful reflection signal. Therefore, imaging of hardrock seismic data with a low
Liuqing Yang, Alireza Malehmir, Magdalena Markovic   +2 more
wiley   +1 more source

New brittleness indexes and their application in shale/clay gas reservoir prediction

Petroleum Exploration and Development, 2015
Aiming at the disadvantages of the brittleness index commonly used in oil/gas exploration, this article proposed two new brittleness indexes (elastic brittleness and mineral brittleness) in order to predict brittle shale distribution accurately: the ...
Zhishui LIU, Zandong SUN
doaj   +1 more source

Slope assisted Physics‐informed neural networks for seismic signal separation with applications on ground roll removal and interpolation

Geophysical Prospecting, Volume 73, Issue 5, Page 1337-1363, June 2025.
Abstract The knowledge of the local slope field of prestack seismic data is essential in several seismic signal processing tasks. Building on our previous slope‐assisted, physics‐informed seismic interpolation framework, dubbed PINNslope, we introduce a series of enhancements that elevate the framework's versatility.
Francesco Brandolin, Matteo Ravasi, Tariq Alkhalifah   +2 more
wiley   +1 more source

Investigation of Submarine Permafrost Conditions in the Canadian Beaufort Sea Using Diving Wave Tomography

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Submarine permafrost in the Canadian Beaufort Sea is relict terrestrial permafrost, which is continuously degrading since the change of thermal conditions induced by a marine transgression that followed the last glaciation. Permafrost degradation has a crucial socio‐ecological significance because its thawing can result in geohazards like ...
H. Grob, D. Klaeschen, M. Riedel, S. Krastel, M. J. Duchesne, J. Bustamante, G. Fabien‐Ouellet, Y. K. Jin, J. K. Hong   +8 more
wiley   +1 more source

Enhanced density estimation from prestack inversion of multicomponent seismic data

, 2010
Using 3C-2D seismic data in the Albacora block, Campos Basin, Brazil, we analyzed the potential of multicomponent data for density esti-mation by simultaneously inverting prestack compressional and mode-converted seismic data.
Gorka Garcia Leiceaga, Joclean Vanzeler, Josimar Silva, Evelin Marquez, Fredy Artola   +4 more
core   +1 more source

3D Gravity Modeling of Complex Salt Features in the Southern Gulf of Mexico

International Journal of Geophysics, 2016
We present a three-dimensional (3D) gravity modeling and inversion approach and its application to complex geological settings characterized by several allochthonous salt bodies embedded in terrigenous sediments.
Mauricio Nava-Flores, Carlos Ortiz-Aleman, Mauricio G. Orozco-del-Castillo, Jaime Urrutia-Fucugauchi, Alejandro Rodriguez-Castellanos, Carlos Couder-Castañeda, Alfredo Trujillo-Alcantara   +6 more
doaj   +1 more source

Initial analysis of stability of prestack velocity inversion of seismic data

Proceedings, 1996
A method of prestack velocity inversion of seismic data using plane wavefield downward continuation equation has been proposed by WANG [1990,1993], Some inversion velocity profiles obtained from prestack marine data have been published in the same paper [VANG, 1990, 1991]. However, stability, a key problem with the inversion method (recurent, stripping)
openaire   +2 more sources

Geophysical Investigations of the Fujairah Basin, East Coast of United Arab Emirates: Insights Into Tectonic Evolution

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract The Fujairah basin in the Gulf of Oman experienced a complex tectonic evolution related to Late Cretaceous ophiolite obduction and Oligocene‐Miocene Zagros continental collision. The structure of the foreland basin in Oman‐UAE is well‐known, but the structure and evolution of the hinterland basin behind the obducted ophiolite and underlying ...
M. Y. Ali, M. Ismaiel, A. Abdelmaksoud, S. Pilia, A. B. Watts, M. P. Searle   +5 more
wiley   +1 more source

Joint Fluid Factor and Brittleness Index Inversion of a Coal-Measure Gas Reservoir with Vertical Transverse Isotropy [PDF]

Lithosphere
A coal-measure gas reservoir can be practically approximated as a medium with vertical transverse isotropy (VTI), accounting for the anisotropy caused by near-horizontal bedding and fractures.
Haibo Wu, Congshun Gao, Wang Xiang, Yaping Huang, Miao Zhang   +4 more
doaj   +1 more source

Constraining the Effect of Bathymetric High Subduction in an Accretionary Wedge: Evidence From the Tokai Area of the Nankai Trough, Japan

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract The Tokai area in the eastern Nankai Trough is characterized by the subduction of a rough plate interface caused by bathymetric highs related to the adjacent Izu‐Bonin arc and fault fabrics in the oceanic crust. However, the effect of this process on the structural development of its accretionary wedge and megathrust seismicity is still poorly
Andrzej Górszczyk, Rafael Almeida, Romain Brossier, Ludovic Métivier, Stéphane Operto   +4 more
wiley   +1 more source