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Keywords: migration
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Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4072851
... The least-squares migration (LSM) based on linear seismic inversion theory can theoretically eliminate the adverse effects of irregular seismic acquisition and band-limited wavelets on conventional migration imaging, and improve imaging resolution and fidelity. The image domain LSM (ID-LSM...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4081169
... Knowledge of the secondary migration of “hydrocarbon families” (genetic groups) from the Lower-Middle Paleozoic formations in the Delaware Basin, is vital for exploration and development of hydrocarbon accumulations in the region. Available chemometric methods offer unique advantages...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089191
... full waveform inversion (JDFWI) for velocity model update, and one way wave equation multiple migration (OWEMM) method were used to generate final imaging. The results provide client with good quality imaging in a relatively large subsurface area. geologist vertical seismic profile migration...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4089264
... migration lsm american association svd singular value nuclear norm minimization mcmechan tv regularization Low-rank representation for re ectivity model and its applications in least-squares migration Jidong Yang, Jianping Huang, China University of Petroleum (East China); Hejun Zhu, George...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100892
... Crosswell seismic imaging is often considered challenging with conventional migration methods, as a significant part of crosswell illumination occurs with large incidence angles, data have low and irregular fold, and the wavefield is complex because of guided waves and mode conversions. Even...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100956
... Starting from the complex phase velocity, in this paper, we derive a system of 2nd order wave equations in 3D visco-acoustic TTI media that can be employed in Reverse Time Migration (RTM) to simultaneously compensate for phase and amplitude distortions. Unlike most available wave equations...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4101478
... Least-squares reverse time migration (LSRTM) stands out as an effective method for delineating complex geological formations, offering a way to offset the limitations posed by limited offset data. However, a significant challenge arises from the computation of gradients in each iteration, which...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4091108
... In practice, in seismic data imaging, our tools/migrations are utilizing the acoustic approximation whether we use towed-streamer or ocean-bottom node (OBN) acquisitions, as pressure data are used in the migrations most of the time. While elastic full-waveform inversion (EFWI) is becoming more...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4091988
... Seismic diffractions generated by small-scale faults, inhomogeneities, and discontinuities contain quantities of valuable information and thus can be used for seismic interpretation in the exploitation of hydrocarbon reservoirs. Separating diffractions in migrated dip-angle domain gather...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4092636
... the imaging quality and characterization accuracy of the fault-karst. In this paper, the full-azimuth local angle domain migration method is used to build local angle domain system at the underground imaging point. The generated full-azimuth directional gathers contain the angle information of different...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4093064
... The ray-based tomography method plays a significant role in velocity model building, due to its consistency with PSDM, efficiency and flexibility to handle various environments. The challenges in ray-based tomography include how to accurately pick residual move-out events from migrated gather...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4093210
... Offset Domain Common Image Gather (ODCIG) serves as a valuable tool for the analysis and validation of migration velocity models. Traditionally, prestack depth migration (PSDM) based on ray-tracing-based Kirchhoff integration is predominantly employed to generate ODCIGs, as it enables...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4093433
... is shown to be able to handle both higher order peg-leg multiples (contrary to mirror migration) and internal multiples. wavefield imaging receiver side rayleigh-marchenko imaging reservoir characterization ud-rm method source side green geologist geological subdiscipline direct arrival...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4096033
.... petroleum geology economic geology model realization noise imaging realization applied geoscience exploration geophysicist reservoir characterization statistical imaging expanded abstract velocity model perturbation migration speckle noise geologist american association clutter model...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4097532
... and adaptive subtraction workflows required to remove multiples before migration. Furthermore, multiple reflections can better illuminate near-surface reflectivity that is difficult to image with primary reflections due to limited near-offset trace density, especially in areas with surface obstructions...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4098684
... We present a prestack true-amplitude angle-domain viscoelastic Least Squares Reverse Time Migration (LSRTM) and demonstrate that it exhibits accurate moveout, which is critical for velocity model building, and accurate amplitudes, which are critical for viscoelastic property estimation...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4098936
... Least-squares reverse time migration in the frequency domain (FLSRTM) is capable of producing a high-resolution reflectivity model, provided that Green’s function can be stored in memory. The Green’s functions employed to compute the gradient and Born-modeled data must be calculated once...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4099591
... wide-azimuth dataset acquired in a deep-water salt environment from the Eastern Mediterranean Sea. geologist sedimentary rock stratigraphy reservoir characterization petroleum geology economic geology wave attenuation noise model exploration geophysicist migration american association...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4099790
... ocean bottom node (OBN) seismic data, which was modeled with a velocity model typical of the Brazilian pre-salt region. Results show that the proposed method better fitted the monitor to baseline in shallow depths, and achieved better recovery of the 4D reservoir changes in migrated images. neural...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100176
...-engineering double sweet spot does not have a high-quality data foundation. In an attempt to improve the data quality of double sweet spot prediction for deep formation tight reservoirs, phase stabilization Q migration technology is applied to enhance the resolution of deep complex structures, leading...

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