Free-surface datum variations cause complications for hydrophone only receiver deghosting algorithms that assume a horizontal free-surface. We describe a multi-shot receiver deghosting approach that derives a tau-psht-prec model of ghost free data at mean free-surface datum. The model is derived so as to simultaneously ...
In this paper, we develop Dynamic-warping Full Waveform Inversion (D-FWI) to address cycle skipping problem which is a well-known challenging issue in conventional FWI. The dynamic warping technique is used to detect the travel time difference between the predicted and the observed wave fields ...
Multiple attenuation is a key step of broadband marine processing which could be challenging for primary preservation, spatial continuities and low frequencies. Rather than a cascaded de-multiple sequence, which could lead to cumulate mistakes and uncertainties, with final results potentially questionable for further pre-stack ...
We propose a 3D deblending method for towed streamer simultaneous source data based on an L1 inversion algorithm. It pursues the sparse representation of 3D coherent signals of the various sources that match the blended data in a combined transform domain of 2D TauP ...
Vertical Seismic Profile (VSP) surveys rely on three-component (3C) geophones to acquire high-resolution data at target reservoirs. These 3C geophones are comprised of three independent receivers, mounted orthogonally. When inside the borehole, the orientation of each 3C geophone is unknown. To enhance image stacking ...
Analyzing seismic amplitude trends requires stability of the seismic wavelet in both amplitude and phase. Unfortunately, in land acquisition, the filter applied as energy travels through the near-surface can have a dramatic impact on both. Here, we will extend previous work on proposing detailed ...
The presence of orthorhombic anisotropy poses serious challenges in multi azimuth (MAZ) or wide azimuth (WAZ) data imaging. Orthorhombic anisotropy makes seismic velocity vary with azimuthal direction as well as polar direction. The polar direction dependency can cause well misties and higher order moveout ...
Various far-offset marine acquisition geometries have been widely deemed as promising for alleviating imaging difficulties in deepwater Gulf of Mexico (GOM). However, incorporating very far offsets into subsalt imaging remains challenging. In this case study in the GOM, we explore the benefits of far ...
Variation of sound wave velocity in water (water velocity) and node positioning errors can cause strong 4D noise in ocean bottom node (OBN) time lapse processing if they are not addressed correctly. Here we proposed a method to jointly invert the water velocity and ...