... This study presents reservoir imaging progress at the Utah FORGE site by using microseismic reflections recorded by Distributed Acoustic Sensing (DAS) during circulation tests in July 2023. The imaging technique treats microseismic events as high-frequency sources, applies prestack Kirchhoff...

... The Eastern Mediterranean province contains world-class producing fields and large exploration potential. Subsalt imaging with narrow-azimuth seismic has inherent challenges that limit ability to constrain reservoir characterization. The imaging challenges include non-flatness of reservoir fluid...

... Seismic imaging in the Tarim Basin, China is challenging because of the complex near-surface conditions, including 1) desert; 2) foothills; and 3) loess. Advanced sandvelocity-curve constrained tomography has significantly improved the robustness of estimating near-surface velocity-depth models...

... Land seismic reflection acquisition and imaging are always challenging. This statement holds even greater truth for near surface imaging targets where weathering and unconsolidated sediments introduce unwanted noise. The following simple heuristic modeling example provides a better understanding...

... various strata and fracture zones was designed based on well logs and seismic interpretations. This model served as a foundation for executing wavefield simulations and imaging, aiming to unravel the intricate fracture seismic response within the Wufeng Formation. We applied anisotropic prestack depth...

... reliable. In this paper, Q pre-stack depth migration in the full azimuth angle domain is carried out on the basis of wide-azimuth seismic data. The actual results show that this method improves the imaging quality and fracture prediction accuracy of unconventional oil and gas reservoir resolution, which...

... 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...

... for complex land structure imaging through both synthetic and field data examples. With only single component data, the elastic RTM can improve migration images for the structures with large velocity contrast and/or the high dipping where the elastic energy becomes prominent. Such elastic energy can...

... Accurate pre-carbonate imaging is a critical necessity in the search for hydrocarbons yet presents substantial geophysical challenges. Preconceptions on what may or may not improve imaging in such settings: can the adoption of innovative imaging techniques delineate and better characterize...

... Due to its low acquisition cost, background noise reflection wave imaging based on seismic interferometry (SI) shows excellent potential in exploration and reservoir monitoring. Unfortunately, body wave reflections are often overwhelmed by surface waves and other signals, making applying body...

... 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...

... Deep sonic imaging is a method to analyze geologic structures around a borehole using waveforms acquired by sonic logging tools. In the past few years, processing methods for deep sonic imaging have been greatly improved in both accuracy and performance. The matched filter approach effectively...

... Viscosity and anisotropy can cause phase distortion and energy attenuation of seismic waves, so it is necessary to consider the influence of such viscosity and anisotropy on seismic wave propagation when performing seismic imaging. In addition, because least-squares reverse time migration (LSRTM...

... In this paper, we propose a workflow based on least-squares full wavefield migration (LS-FWM). It can make use of raw hydrophone and geophone data to push the resolution of reflectivity images beyond what conventional imaging approaches, using processed data (de-signature, de-bubble, PZ match...

... Borehole acoustic-wave reflection imaging technology is now widely used in high-angle and/or horizontal wells to delineate geological features in the formation surrounding the well. We develop an application that combines the fourcomponent dipole shear-wave azimuthal imaging with a coordinate...

... In this paper we demonstrate the full-track processing of the seabed distributed acoustic sensing (SB-DAS) data from the North Sea for joint PP and PS imaging. We discuss the main challenges specific to the fiber optic recordings and present proposed solutions. Being an emerging technology, SB...

... method and thus the efficiency of the whole model building and imaging is improved. Furthermore, our method protected the signals generated by diffractors within the Fresnel zone and thus improves the accuracy of the diffractors. Application of the new method to complex synthetic and field data reveals...

... We applied full waveform inversion (FWI) to an offshore gas field in Trinidad with complex geology. We obtained a detailed velocity model up to 30 Hz using Ocean Bottom Cable (OBC) data, a first in this basin. The corresponding FWI-derived reflectivity (FDR) image provides geologic information...

... 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...

... The imaging of Near-field hydrophones (NFH) data are the complementary for the conventional seismic data imaging. The main challenge of NFH data processing is denoising. So we propose the high precision low cut filter to remove hydrostatic pressure noise, the data-driven debubbling method...