Seismic imaging by nonlinear inversion

Apr 24, 2023 | CWP Blog

Posted by Werter Silva Seismic imaging is a powerful tool for visualizing and characterizing subsurface geologic structures. It has been shown that this process can be formulated as an inverse problem, where the recorded seismic data are linearly related to model...

Facies-based elastic full-waveform inversion for tilted orthorhombic media

Apr 17, 2023 | CWP Blog

Fig. 1: Workflow of facies-based elastic full-waveform inversion using rock-physics constraints. ​   Posted by Ashish Kumar Most existing applications of full-waveform inversion (FWI) to orthorhombic media are limited to models with a horizontal symmetry plane....

A time-stepping algorithm to solve the acoustic radiative transfer equation

Apr 9, 2023 | CWP Blog

Fig 1.: Solution to the 2D acoustic wave equation in a medium with constant density and randomly varying velocity.    Posted by Manuel Alejandro Jaimes Caballero As waves propagate in random media, they exhibit complicated patterns due to the interaction with...

Removing Free-surface Effects from Seismic Data Using Convolutional Neural Networks

Apr 3, 2023 | CWP Blog

Posted by Mert Kiraz The presence of a free surface (or air-water interface) creates a strong impedance contrast between two adjacent subsurface structures. The free-surface effects can be seen in two different ways in the seismic data: (1) free-surface multiples and...

High-frequency 3-D acoustic reverse-time migration (RTM) for DAS 3-D VSP quality survey geometry

Mar 13, 2023 | CWP Blog | 1 comment

Posted by Cullen Young Surface three-dimensional (3-D) seismic acquisition surveys and various targeted drilling programs have confirmed the regional extent of methane gas hydrate deposits on the North Slope of Alaska at Kuparuk. The hydrates have been found in...

Numerical modeling of the acoustic wave equation in a generalized coordinate system

Mar 6, 2023 | CWP Blog

Posted by Khalid Almuteri Accurate wave equation modeling is necessary for understanding wave propagation under realistic acquisition conditions, such as a time-varying sea surface and/or moving source. Moreover, numerical wave-equation solutions form the basis of...