RadExPro have recently updated their tutorial on Advanced Offshore High-Resolution Multichannel Seismic Processing. The Multiple Removal section now includes several new pages detailing the Curvelet Domain Subtraction technique. This method can enhance—sometimes significantly—the effectiveness of subtracting a multiple model from the original wavefield.
RadExPro Version 2025.1 boasts two new features to add to it every growing marine repertoire.
The Unaliased Fourier 2D Interpolation module conducts interpolation of 2D data in Fourier domain. Depending on the parameters and input data, this module can be used to regularize a 2D gather, fill holes in it (e.g., reconstruct missed shots on a common-channel gather or broken channels on a common-shot gather), or interpolate it onto a finer grid. For seismic streamers with changing receiver spacing, this module can be applied to create constant spacing. When interpolating/regularizing common-shot, common-receiver or common midpoint gathers, NMO can be applied before this module in the flow to decrease the probability of introducing aliasing into the interpolation result. The module has an antialiasing scheme and can, theoretically, reconstruct aliased data, so one may choose to interpolate such gathers without NMO to enable the interpolation of both reflected signals and various types of noise (for example, surface waves). It is an alternative solution to the existing Sparse F-K Interpolation with a different interpolation algorithm and additional capability for header interpolation.
The new module OBN Multi-Component Rotation function estimates the tilt and orientation angles of an OBN (Ocean Bottom Node) based on first-break energy polarization analysis and performs the corresponding rotations. If an OBN is not equipped with orientation sensors, the module can be used to compute and apply the necessary data rotation. Otherwise, it can serve as a quality control tool to verify the proper functioning of the orientation sensors. The module allows rotation of the X-component either toward the north or toward the source.
Introducing the EM38-4 Electromagnetic Conductivity meter
ALT have recently released a new step-by-step tutorial for WellCAD’s advanced multiwell interpretation feature. Whether you are streamlining workflows or aiming for more precise well correlations, this guide is designed to help you make the most of your borehole data. In the tutorial, you will discover how to:
Seamlessly integrate multiple well logs into a single, coherent interpretation.
Enhance your analysis workflow for faster, more informed decision-making.
Leverage advanced features that simplify the complexities of multiwell data management.
