Technical Content

Placing marine sources on the top of the seismic streamer spread improves resolution and reservoir inversion in shallow and intermediate depth targets. This is due to the abundance of near offset data and high level of illumination compared to conventional marine seismic. A drawback ...

Shallow stratigraphy in Southern Oman is characterized by the presence of a shallow anhydrite layer causing a strong velocity inversion which makes seismic imaging particularly tedious. This known shallow sharp velocity inversion cannot be easily captured with reflected waves based techniques or even acoustic ...

TopSeis unique setting creates both new benefits and challenges for processing and imaging which, once solved, offer an ideal high resolution picture of the underground. This paper define faced challenges and how processing needs to be optimized in order to obtain brand new geological ...

We discuss the survey planning and provide results from a marine acquisition conducted northwest of the Shetland Islands. The survey was designed to image multiple targets from shallow Tertiary and Cretaceous plays, through to complex fractured Devono-Carboniferous reservoirs. Marine acquisitions are typically conducted along ...

Gas absorption causes anelastic effects (described by the quality factor Q) and is a well-known source of amplitude loss and phase distortion in seismic data. Advances in our full waveform inversion technology mean it is now possible to compensate for phase distortion and amplitude ...

Seismic data must be optimally processed for accurate reservoir characterization, and therefore each step of the processing sequence should be carefully designed and assessed for AVA compliance and primary preservation. In this paper, we focus on the demultiple, a critical step as it can ...

In principle, high quality pre-stack converted wave (PS) data can provide valuable complementary information to PP data to highlight seismic amplitude anomalies in areas with complex imaging problems such as steeply dipping structures and obscured areas. However, in practice, we often find that PS ...

Well planning is one of the most demanding aspects of drilling engineering for hydrocarbons. Hence, seismic exploration objectives often require the interpretation of the seismic image as early as possible to facilitate well planning. This task becomes challenging when one needs to employ advanced ...

The interpretation of fault surfaces is key to understanding the subsurface geology represented in 3D seismic volumes. The geologic structure represented by seismic reflections can be auto-tracked in the volume. Faults, however, are imaged as discontinuities or changes in curvature in the seismic data ...