...Enhanced crustal-scale depth imaging using least-squares RTM of short-streamer seismic data S.Y. Moussavi Alashloo1, Andrzej Górszczyk1,2* and Michal Malinowski1, 1Institute of Geophysics, Polish Academy of Sciences; 2Univ. Grenoble Alpes, ISTerre, Yasir Bashir, Universiti Sains Malaysia Summary...

... ABSTRACT Recent bidding rounds announced by Mexican authorities resulted in renewed exploration interest within the offshore deep-water Campeche area, a typical salt province marked by geological complexity. Velocity model building for subsalt depth imaging in this area is challenging due...

.... To obtain better seismic images, a large ocean-bottom cable (OBC) survey was recently acquired using full-azimuth acquisition and long offsets. These seismic data were processed through depth imaging to produce images of the subsurface that are superior to previous work in the area. We describe applying...

... naturally requires more effort than processing of PP data alone, and for this reason much PS data remains unprocessed. Efficient workflows for processing of PS seismic data are required to minimize the extra time required for PS processing. Model building for depth imaging of PS data is more complicated...

...Multiscale hierarchical seismic-CSEM joint inversion for subsalt depth imaging in the Red Sea Daniele Colombo*, Diego Rovetta, Ersan Turkoglu, Gary McNeice, Ernesto Sandoval-Curiel, Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco Summary We discuss the application of seismic...

... is observed as well as loss of frequency content. We present an improved depth imaging methodology which uses a high-resolution image-guided tomographic solution that addresses the velocity variations and Q tomography and Q migration that address the attenuation problem. The compensation of amplitude...

... ABSTRACT We describe a special tomography workflow that has been implemented in our Yucatan Platform depth imaging 2D project in the Mexican GOM (MGOM). The workflow is designed for a very rugose water bottom like the Yucatan Platform and Escarpment area with very shallow water and very low S...

... , 10.1190/tle35110968.1 . Taner , M. T. , F. Koehler , and K. A. Alhilali , 1974 , Estimation and correction of near-surface time anomalies : Geophysics , 39 , 441 – 463 , 10.1190/1.1440441 . modeling fast-track depth imaging saudi arabia government anomaly...

... complex environments compel us to look for ways to overcome these assumptions as they are violated. Using the depth migration velocity model, we apply an offset dependent traveltime summation as the moveout correction for reflection static calculations in depth imaging. Presentation Date: Wednesday...

... of shear wave imaging are many: statics and near surface scattering, anisotropic velocity analysis, depth conversion and event registration, to name a few. It seems essential to move to depth imaging if the full promise of multi-component data is to be realized. As P-p processing moves to more complex...

... anisotropy reservoir characterization migrated data anisotropy dataset azimuthal velocity analysis depth imaging complex velocity model apparent azimuthal anisotropy overburden upstream oil & gas seg seg international exposition lateral velocity variation imaging annual meeting velocity...

... meeting tti kirchhoff image seismic data westerngeco seg seg international exposition gulf velocity model frequency imaging upstream oil & gas broadband tti kirchhoff image depth imaging mexico resolution Bakulin , A. , M. Woodward , Y. Liu , O. Zdraveva...

... lateral variation of near-surface occurred. Comparing with conventional processing and depth imaging, the result of this method in foothills of southern Tianshan mountain has greatly improved imaging quality, indicating the validity and effectiveness of our statics solution. Introduction The foothills...

... Summary The paper presents a land seismic depth imaging case history during which an advanced TTI PSDM velocity model building approach was applied on data acquired in 2003. The method includes an attempt to compensate for the lack of fold coverage in the shallowest part of the gathers along...

... reservoir characterization depth imaging velocity model azimuth upstream oil & gas initial model ovt domain workflow full azimuth tomography velocity modeling azimuth data tomography butterfly gather migration hq full azimuth survey inversion cip gather information initial...

... Summary Reflection tomography is widely used to build velocity models for seismic depth imaging, however several factors can limit its effectiveness, particularly in resolving complexities in the near surface. A 3D dataset acquired in a mountainous area of west China exhibited several...

... Summary In this study we demonstrate how incorporating controlled source electromagnetic (CSEM) and magnetotelluric (MT) data in the velocity model building improves seismic depth imaging in sub-basalt settings. We consider data acquired in the Faroe-Shetland basin. The resistivity model...

... depth imaging included, non-stationary coherent noise modeling and removal, 3D processing of all 2D and 3D data, 3D tomography, residual statics using first-arrivals, and adaptive fast beam migration. No sonic log velocity data were available so multiple stages of 3D velocity inversion including joint...

... in these areas. Here we demonstrate that the recovery of detailed velocity variations in the near surface is essential for depth imaging of deep targets. Specifically, we focus on a case from an arid environment where low-velocity zones and layers are present in the near surface and shingling of first arrivals...

... Summary Over the past 20 years, ray-based post-migration reflection tomography has remained largely unchallenged as a velocity model building tool for seismic depth imaging. While other methods have been proposed, they have yet to be adopted into standard workflows. The decisive elements...