Technical Content

Guided wave inversion (GWI) estimates accurate P-wave velocity in the near surface by analyzing the dispersion curves of guided waves. In this paper, we propose a robust inversion scheme to reduce the non-unique solutions and discuss the usage of GWI for full waveform inversion ...

This paper presents joint 3D MT, gravity, and MEQ tomography inversions at the Darajat geothermal filed, in Java, Indonesia, using cross-gradients to link the different geophysical properties. An additional structural constraint is provided via cross-gradients to the current geological porosity model for the field ...

We show how to separate the seismic image into specular reflections and diffractions using dip-angle gathers. A North Sea example and a 4D example are used to show the efficacy of the algorithm. The 4D example shows a significant reduction in imaging noise.

While the benefits of vertical particle velocity measurements are well known for towed streamer receiver deghosting, in many cases high noise levels can cause practical issues. We describe an inversion-driven receiver deghosting approach which is jointly constrained by hydrophone data and prior wavefield separated ...

All seismic data, whether 2D, 3D, post-stack or pre-stack contains noise. Typically, this noise is comprised of both coherent and random components. Coherent noise presents itself as regular patterns in the seismic data. It may appear to be random or coherent depending on the ...

The Gippsland Basin in South-Eastern Australia has been producing hydrocarbons since the early 1960’s when several giant oil and gas fields were discovered. It can therefore be considered to be a mature area, where production rates have been declining for the last twenty years ...

Barreirinhas basin is located in the north-east of Brazil and is part of the Brazilian equatorial margin, a new exploration frontier with complex geology. This basin is characterized by a rugose water bottom, a fast carbonate platform, shallow gas pockets and a complex channel ...

Paper written in association with SNH for the March 2018 additions of First Break. Paper focusses on understanding why well success was low for the offshore Douala basin and how the interpretation of the results of the GeoSpec Regrid will enable a better understanding ...

The scope for using EO satellites for routine monitoring of offshore operations is continually expanding in ways that make factors of cost and time more feasible than ever before. Near-real-time processing and delivery remain the most appropriate solution for emergency scenarios; however, proactive monitoring ...