Blended acquisition of ocean bottom node (OBN) surveys may provide important time savings when the survey duration is tightly constrained. We present a method that focuses on the deblending of OBN data recording two simultaneous sources in the Gulf of Mexico. By knowing the ...
Technical Content
Imaging the near surface using surface consistent prediction operators: examples from the Middle East
Imaging the near surface using surface consistent prediction operators: examples from the Middle East
The scope of this paper is to illustrate how surface-consistent deconvolution operators can help to image the shallow subsurface on land data. Two case studies from modern, dense, wide-azimuth surveys recently acquired in Oman are presented. The predictive deconvolution operators were computed from an ...
Estimating Anisotropic Parameters Using Joint Tomographic Inversion - a Case Study from Offshore West Africa
Estimating Anisotropic Parameters Using Joint Tomographic Inversion - a Case Study from Offshore West Africa
Anisotropic parameter estimation is very challenging for new exploration areas where there are no wells. In an offshore survey of over 3000 km2 in the west of Africa, we used surface seismic data in a non-linear tomographic inversion to simultaneously estimate migration velocity and ...
Reverse Time Migration of Multiples (RTMM) adapted for OBN data with examples from deepwater Gulf of Mexico.
Joint PP-PS inversion without prior data registration
Joint PP-PS inversion without prior data registration
Standard joint AVO inversion of PP and PS seismic data rely on a registration process beforehand to align PP and PS data in a common time domain. This is a difficult step prone to error that may deteriorate the inversion results. We present a ...
Unlocking the full potential of broadband data with advanced processing and imaging technology, a case study from NWS Australia
Unlocking the full potential of broadband data with advanced processing and imaging technology, a case study from NWS Australia
The high costs associated with hydrocarbon exploration in deepwater have led to an increased business demand for acquisition and processing of high-resolution broadband seismic data. In this paper, we review our experience of working on the Shell Sandman 3D survey, which was acquired using ...
Estimation of Uncertainties in Fault Lateral Positioning on 3D PSDM Seismic Image - Example from the NW Australian Shelf
Estimation of Uncertainties in Fault Lateral Positioning on 3D PSDM Seismic Image - Example from the NW Australian Shelf
We present a two-step sequence to estimate uncertainties in lateral positioning of fault planes on 3D PSDM seismic images. The first step provides an approximate evaluation of what causes the uncertainties, how uncertainties are distributed in 3D space and what to expect within our ...
Automatic Gas Pockets Detection by High-resolution Volumetric Q-tomography Using Accurate Frequency Peak Estimation
Automatic Gas Pockets Detection by High-resolution Volumetric Q-tomography Using Accurate Frequency Peak Estimation
Conventional imaging does not deal adequately with absorption, especially in the case of strong anomalies. Over recent years, many authors have proposed to compensate the absorption loss effects inside of the migration through the use of an attenuation model. Q tomography has been developed ...
Attenuating pseudo S-waves in acoustic anisotropic wave propagation
Attenuating pseudo S-waves in acoustic anisotropic wave propagation
The importance of anisotropy in seismic imaging has been recognized for several decades. In recent years, a growing number of anisotropic applications of reverse time migration (RTM) and full waveform inversion (FWI) have attempted to account for anisotropic effects of the real-world subsurface physics ...