... overhangs poses tremendous challenges to subsalt imaging, especially when the input data is suboptimal. Legacy images of streamer data from conventional velocity model building (VMB) driven primarily by manual salt interpretation, which could not systematically address the complicated overburden, show...

... Deepwater Campeche in the southern Gulf of Mexico is at the confluence of multiple structural domains, including a complex and extensive salt canopy, creating significant challenges for velocity model building and subsalt imaging. Recent developments of Full Waveform Inversion (FWI) and FWI...

... imaging. In this abstract, we present the cascaded application of three critical technologies to improve the subsalt imaging in Brazil Campos basin data: hybrid interbed demultiple, P- and S-salt velocity joint migration, and subsalt converted wave suppression. We will showcase in detail through examples...

... image improvement can be achieved. rtm optimization frequency attenuation reservoir characterization hz rtm migration expanded abstract upstream oil & gas international enhancement american association subsalt imaging applied geoscience exploration geophysicist gulf basement...

... and the subsalt image, even when only using WAZ streamer data. However, this approach relies on RTM images for the evaluation of model updates, which are highly susceptible to illumination issues. The recently developed FWI Imaging algorithm can bolster the approach by reducing the impact of poor illumination...

... structural geology applied geoscience subsalt image salina subsalt imaging velocity model bravo province reservoir characterization overlay upstream oil & gas workflow building workflow exploration geophysicist 10 scenario geobody perdido fold belt case study complex...

... velocity-model building expanded abstract exploration geophysicist 10 acquisition reservoir characterization imaging velocity model fwi subsalt imaging shen seg international exposition case study upstream oil & gas mexico streamer data full-waveform inversion gulf complex...

... schlumberger-private velocity model sparse obn survey acquisition subsalt imaging obn acquisition fwi sparse obn acquisition reservoir characterization imaging exploration geophysicist 10 sparse obn data large-scale obn acquisition upstream oil & gas expanded abstract seg...

.... However, Born approximation is only valid for small model perturbations and has limited angle validity, while Kirchhoff approximation has no rigorous restriction about the jump in medium parameters across a given reflector and it also has a large regime of angle validity. For subsalt imaging...

... upstream oil & gas imaging inversion constraint reservoir characterization cross-gradient constraint seismic-constrained csem inversion information subsalt imaging artificial intelligence machine learning deep learning resistivity model inversion operator Anderson , C...

... acquisition design application subsalt imaging fwi exploration scale obn direct arrival basement seismic acquisition design node patch Dines , K. , and J. Lytle , 1979 , Computerized geophysical tomography : Proceedings of the IEEE , 67 , 1065 – 1073 , 10.1109/proc...

... ABSTRACT Subsalt imaging at the Stampede field in the Gulf of Mexico (GoM) has remained challenging for decades due to the existence of a large and complex sediment inclusion inside a thick tabular salt. Recently, appropriate fullwaveform inversion (FWI) algorithms have been developed...

... ABSTRACT Stampede field is a faulted subsalt four-way reservoir in Green Canyon, Gulf of Mexico. Interference from the complex overburden, which carries large velocity errors and creates non-uniform illumination for the subsalt, has remained a challenge to subsalt imaging. Before correcting...

... ABSTRACT As the key step in subsalt imaging, conventional salt model building has typically relied on manual interpretation of the salt geometry, which proves to be difficult for resolving complex salt models. As a result, subsalt imaging has been approaching a plateau in the last few years...

... Type: Oral enhancement migration swing dgss chakraborty rtm image enhancement technique subsalt imaging annual international meeting image enhancement reservoir characterization upstream oil & gas seg international exposition noise annual meeting thunder horse case study...

..., interpretation driven modeling (IDM) to remove structural distortions, and subsalt tomography followed by directional image stack (DIS) to improve the subsalt image. The use of TTI anisotropic Kirchhoff PSDM combined with TTI Reverse Time Migration in the model building provided accurate velocity model and high...

... waveform inversion annual meeting upstream oil & gas salt interpretation tomography rtm sog velocity model application annual international meeting perturbation rfwi imaging reservoir characterization velocity update seg seg international exposition subsalt imaging Chazalnoel...

... ABSTRACT The problem of subsalt imaging in the presence of salt interfaces uncertainty is considered. Realizations of salt interfaces are created via statistical modeling where input parameter is the uncertainly of the depth position of the reference interface. For every realization we create...

... up to 25 km, and investigate the untapped potential of extremely far offsets of up to 50 km. Using offsets between 12 km and 25 km is not straightforward but these offsets can significantly improve the subsalt images and were valuable for building the salt model in this study. Although...

... conclude that the best illumination-compensated subsalt image produced in our tests is produced through a combination of the model-based and data-driven illuminations. The new technique can increase S/N and provide better image amplitude fidelity. Our study indicates that the conventional model-based...