Technical Library

We propose a multiparameter elastic FWI to simultaneously invert P-wave velocity and reflectivity. Our theoretical framework consists of two main elements for achieving this multiparameter inversion....

Least-squares imaging in image domain utilizes Point Spread Functions (PSFs) to estimate the Hessian matrix. The conventional way to compute PSFs involves cascaded operations-modelling followed by...

Seismic baseline surveys over CO2 storage reservoirs need to be sampled well enough for a proper characterization of the storage complex including potential leakage pathways over an area at least as...

Machine Learning (ML) is transforming 3D ultra-high-resolution seismic (UHRS) data processing, offering faster, consistent, and high-quality results. This study highlights ML applications in...

The main reservoirs in the Balder and Ringhorne areas consist of large Paleocene sand mounds as well as Eocene sands, including thin and steeply dipping injectite bodies. Imaging of the targets in...

The 2021 update to the Nigerian Petroleum Industry Act (PIA) has sparked a surge in exploration activity in the deepwater Niger Delta, particularly within the lesser explored shale diapir zone where...

We discuss the use of angle gathers in updating subsurface models within multi-parameter Full Waveform Inversion (FWI). The framework utilizes binned image gathers for modeling full pre stack data...

3D Seismic Foundation Models (SFMs) have been scaled to 1.8 billion parameters, pushing the boundaries of AI-driven seismic analysis. This work employs Vision Transformers (ViTs) augmented with...

High-density 3D seismic data over the Greater Endurance CO2 area have been processed by deploying a processing sequence to maximize resolution, including migration algorithms using primary...

A high-resolution seismic reprocessing project was conducted offshore Ghana. State-of-the-art processing sequence at 2 ms sampling and full waveform inversion based velocity model building enhanced...

2D and 3D seismic data from frontier offshore basins around Africa has been subjected to relative extended elastic impedance inversion (rEEI) to screen for AVO anomalies and to identify large,...

The study addresses the challenges of 4D seismic inversion in the mature Albacora Leste field, Campos Basin, Brazil, a complex deepwater reservoir with stacked turbiditic deposits. Using a 2005...

Field data recorded by a new rotational 6-degree-of-freedom sensor have been analysed. Rotational components were used for evaluating the polarization vector of the seismic events in the data and a...

In seismic imaging, reducing the turnaround time of imaging projects is essential. Although advances in computer power have shortened the processing time of the standard marine sequence, this...

This paper introduces an innovative deep learning (DL) approach for deghosting Ultra-High Resolution Seismic (UHRS) data, addressing the limitations of traditional physics-based methods, which are...

This study presents a workflow for building depth velocity models (VMB) using 3D Ultra-High-Resolution Seismic (UHRS) data, focusing on offshore wind farm site characterization. Traditional velocity...

A multiparameter inversion workflow that simultaneously estimates velocity and reflectivity was applied to ocean bottom node (OBN) dataset from the deep waters of the Santos basin, offshore Brazil....

The study highlights the application of Elastic Full-Waveform Inversion (eFWI) to address imaging challenges in the complex geological structures of the Nile Delta. Unlike acoustic FWI (aFWI), eFWI...

The world is undergoing an energy transformation, with the UK aiming for 50 GW of offshore wind capacity by 2030. Achieving this goal requires technologies that can accelerate the development of...

We have trained a deep neural network based on Fourier Neural Operators (FNOs) to replace the traditional tomographic inversion engine and successfully performed velocity predictions on field...

In this paper we present an innovative node design and deployment method that challenges the coupling paradigm. We have designed and tested an autonomous seabed recording system, but instead of...

Recently processed or reprocessed 3D data in infrastructure-rich settings in the North Sea and on the Atlantic Margin, has been subjected to relative extended elastic impedance (rEEI) inversion to...

Using attributes enhances the QC of seismic data processing. These attributes can be derived in a manner that captures the characteristics of particular processing steps. The use of process specific...

The Namibian margin is one of the hottest exploration areas in Africa, with multiple multi-billion barrel discoveries in the Orange Basin since 2022 within a range of Upper and Lower Cretaceous...

This study presents a regional sequence stratigraphic framework for the offshore basins of NW Europe, covering the Carboniferous to present day. By analyzing over 5,800 wells and integrating seismic...

The integrated analysis of seismic profiles, well data and plate reconstructions reveal a wide range of rift and drift phase elements on the conjugate margins between the St Paul and Guinea Fracture...

A good image of the seabed and shallow subsurface is crucial for activities such as windfarm site characterization. To generate a good image, it is usually necessary to attenuate the ghosts in early...

The hydrocarbon reservoirs on the Atlantic Margin of Brazil present several key geophysical challenges – in particular in imaging below the complex salt bodies. In this paper we will discuss the...

We utilise a large database of regional 2D seismic, integrated with detailed geochemistry of surface (micro)seeps, to build a 3D Basin & Petroleum Systems Model for the MSGBC Basin, NW Africa. The...

The energy industry is in the process of undergoing a profound digital transformation. This transformation is using advanced technologies to enhance efficiency, safety, and sustainability. User...

The Lower Congo Basin is a mature exploration province but has significant remaining potential, where existing plays can be extended into areas of greater geological complexity. Modern seismic...

Recent exploration successes in the Orange Basin off Namibia and South Africa have ignited renewed interest in the offshore potential of Uruguay, Northern Argentina, and Southern Brazil. This study...

Horizontal (H) components of ocean bottom node surveys are acquired at no additional cost to the extensively analyzed vertical (Z) and pressure components. Despite this, H components are seldom...