Technical Library

A marine seismic method based on continuous source and receiver wavefields has been developed. The method requires continuous recording of the seismic data. The source that may consist of multiple...

Hydrocarbon exploration in the North Sea Basin has revealed a multitude of focused fluid conduits, which manifest in seismic data as pipe or chimney structures that in some instances are connected to...

The SEG will host a post-convention workshop at the annual meeting in San Antonio, Texas (September 2019) entitled Real-Time Processing for Large-Scale Streaming Seismic Data. Two relevant questions...

The south-western Barents Sea is characterised by a complex geological regime with a heterogeneous overburden. A key challenge in producing an accurate image of the subsurface lies in creating a...

Late Cretaceous channel systems create structural uncertainty and impact amplitude fidelity of both Late and Early Cretaceous plays in deep water Cute dIvoire seismic data. We present a case study...

The peak sound pressure levels (SPL) and the sound exposure levels (SEL) are significantly reduced with the seismic methodology based on the emission and recording of continuous source and receiver...

Iterative least-squares migration is an expensive process that requires several passes of migration and demigration. In this paper we focus on how an optimized initial reflectivity model combined...

Located in the easternmost part of the Mediterranean Sea, offshore Lebanon remains a frontier, untested basin surrounded by many discoveries and proven working petroleum systems. Large gas fields...

Noise attenuation is a key processing step in a typical seismic imaging flow. Assessing the quality of the denoise process to ensure that noise has been sufficiently attenuated without signal...

Source deghosting and demultiple algorithms have been extensively studied but mostly in the case of a flat seasurface. In this work, we consider time-varying sea-surfaces in different types of...

Successful time-lapse studies require special care when it comes to the removal of undesirable artefacts caused by the differences in acquisition geometries. By attempting to repeat the source and...

Barnacle growth on seismic streamers creates noise on the recorded signals. Keeping a low noise level in barnacle areas is challenging to the seismic crews. Frequent workboat trips are required for...

Tony Martin and Marcus Bell describe the use of a Monte Carlo simulation, enabling multiple realizations of the solution in order to derive estimates of the uncertainty of an individual model, as...

In summer 2018, PGS acquired a survey offshore Brazil using an acquisition and processing method based on continuous wavefields on top of a survey that had been previously acquired using a...

There are several challenges with the conventional 3D marine seismic method that are addressed with a novel seismic methodology based on the emission and recording of continuous source and receiver...

The South-Western Barents Sea is characterized by a complex geology with a heterogeneous overburden. Different target depths add a further level of complexity to the design of the appropriate...

Least-squares migration has over the last few years become the new standard in high-end seismic imaging. In this paper we utilize iterative least-squares migration in different geological settings...

The standard workflow for velocity model building (VMB) in complex regimes is an interpretive process that requires time-consuming manual intervention, and remains an error-prone process that can...

There is a desire by the marine geophysical industry for a seismic source with a low environmental footprint. Received sound pressure level (SPL) and sound exposure level (SEL) can restrict how...

This paper presents a new method for simultaneous source deblending developed in the context of spatial coherency preservation. The deblending is formulated as an inverse problem which is solved in...

Full Waveform Inversion (FWI) success depends on producing seamless short- and long-wavelength model updates while avoiding cycle skipping. In its traditional implementation, FWI risks converging to...

Least-Squares migration (LSM) produces high-resolution images ready for reservoir characterization. It corrects the image amplitudes from the migration operator limitations and the uneven...