We demonstrate how the use of multiples in imaging may provide improved shallow illumination and potentially reduce the requirement for extensive site-survey acquisition in some areas.
This case study demonstrates the collaborative advantages when an Operator and a Geoscience Contractor work collectively as part of a tailor-made Integrated Virtual Asset team, to solve complex subsurface challenges in a restricted time frame. The operating challenge was to de-risk a potential drilling ...
Geomechanical screening of potential CO2 storage sites in deep geological formations presents a substantial challenge, particularly in tectonically active regions like offshore Sarawak. In this study, we collect existing logs and downhole stress and pressure measurements to construct 1D mechanical earth models for three ...
This study focuses on mapping the lateral and vertical extent of high-quality reservoir sandstone units within the Late Jurassic Fulmar Formation, adjacent to salt interpod walls within the Shaw Field, UKCS. An integrated approach, which combined biostratigraphy, petrography, electrofacies, image log analysis and seismic ...
Mohns Ridge is currently the subject of much interest owing to the occurrence of hydrothermal vent fields and critical metal-bearing seafloor massive sulphide (SMS) deposits along this segment of the ultraslow-spreading Arctic Mid-Ocean Ridge. To target where potentially mineable SMS deposits may form or ...
Multi-dimensional deconvolution (MDD) is an attractive method to remove free-surface multiples for OBN datasets. Multi-dimensional implementations are able to produce accurate multiple models in areas of structurally complex reflectivity. For most OBN acquisitions, the receiver density is not sufficient for receiver-side MDD. Consequently, source-side ...
Acoustic full-waveform inversion (FWI) is widely employed to produce high-resolution subsurface models, especially for the P-wave velocity. However, more complex geological challenges, such as shallow chalk and salt, generate strong impedance contrasts that exhibit elastic effects, causing acoustic approximations to struggle. In parts of ...
A good estimation of velocity anisotropy is important in a pre-stack depth migration project in order to obtain proper focusing and accurate depthing of the seismic image. Considering that the velocity along the bedding is expected to be faster than across the bedding, the ...
Marine vibrator sources offer the ability to emit a fully customisable and accurately repeatable sweep signature. Resulting peak amplitude levels are much lower than for airguns, making marine vibrators potentially preferable for the welfare of marine life. While the highly repeatable nature of the ...