... Marine vibrators are viable alternatives to seismic air-guns in ocean-bottom acquisition because of their low environmental impact. They are also advantageous due to their ability to generate more low-frequency content compared to air-guns, and due to their suitability for simultaneous...

... datasets. The main difference with conventional approaches is the simultaneous usage of both 4D datasets for estimating the water velocity changes and therefore minimizing the seismic difference in the overburden. The methodology is significantly beneficial for deep-water 4D acquisitions. The correction...

... from an irregular-grid onto a regular grid. An interpolation operator is used to link irregular-grid acquisition with the regular-grid output. A fast and computational-efficient multidimensional singular spectrum analysis (FMSSA) is adopted as the projection operator to speed up the low-rank step...

...), and water becomes mud, which tends to clog airguns resulting in operation down time. A PAT resolves these issues and effectively provides a constant seismic signature for vertical seismic profile (VSP) acquisition, as well as added flexibility to maximize the value of BHS surveys, such as offset VSPs...

... In the south of China, the ground is covered with thick vegetation, there are dense population and rich infrastructures in mountainous areas. Seismic acquisition designs without high-resolution geographic information data will cause great safety risks, and also have direct influence...

... The studied field is located in the Santos Basin, offshore Brazil, some 200 km south of Rio de Janeiro and in approximately 2000m water depth. A data-rich appraisal campaign consisting of three appraisal wells with comprehensive logging and an OBN seismic acquisition, enabled the venture...

... For many research, exploration, or engineering projects with limited funding, it is common to use an acquisition design with observations on several 2D lines, either in parallel or in a cross-line pattern. Such acquisition patterns are intuitive and easy to implement, but they cannot collect...

... Designing seismic acquisition is a blend of science and art, especially in a desert environment with low signal-to-noise ratios (SNR) of -20 to -60 dB. Basic design driven by the square-root model may be overly simplistic. At the same time, conventional numerical feasibility studies are lengthy...

... The volume of seismic uphole surveys in the desert environment diminished, facing harsh drilling conditions and challenging acquisition. This occurs against a backdrop of the growing popularity of land depth imaging from the surface, demanding ever more accurate near-surface velocity calibration...

... alternative with less cost, provided the directivity challenge can be solved. DAS also opens new horizons to deliver multiscale data in the form of “shallow”, “deep”, and “FWI” surveys leveraging acquisition with the same fixed cables. While DAS offers multiscale data at no extra cost, conventional point...

... upstream oil & gas applied geoscience acquisition reflectivity interface fwi exploration geophysicist inversion society sparse obn summary international rtm frequency full-waveform inversion equation sub-salt imaging Turning high resolution FWI model into pseudo-reflectivity, a case...

.... Note: This paper was accepted into the Technical Program but was not presented at IMAGE 2022 in Houston, Texas. upstream oil & gas azimuthal anisotropy application acquisition azimuth partition international applied geoscience reservoir characterization bin american association...

... will highlight the combination of innovative acquisition, quantitative interpretation, and seismic morphology interpretation that delivered enhanced imaging and understanding of the Tertiary-Jurassic interval and also an improved assessment of the volume size of some exploration leads/opportunities. multi...

... Results are presented from the processing of new acquisition in combination with complementary reprocessing of legacy data over 8200 square kilometers in the deep waters of the Campos Basin, offshore Brazil. The acquisition configuration was a result of extensive survey design and modelling...

... New and innovative survey design solutions for marine towed streamer acquisition were recently introduced by Widmaier et al . (2019). One of the key technical elements was the concept of wide-tow multi-sources, i.e., the distribution of multiple sources along the front of a streamer spread. All...

... In this work, key ideas of the Compressive Sensing (CS) theory help us present a framework for seismic data reconstruction. The program was applied on ultrasonic 3D data that mimics a marine seismic acquisition over a pinch-out reservoir model. First, we modeled a CS-based seismic survey...

... To image complex subsurface structures, the wavefield recording layout is more suitable than the conventional method of seismic data acquisition layout since it is better to attenuate noise and to record more energy that impacts subtle aspects of the geologic objective. However the wavefield...

... In marine blended acquisition, the dither table was widely used to improve the discrete characteristics of blended noise from other sources in different transformation domain for a better de-blending result. As a random time sequence, the dithers were uniformly designed to distribute over...

... With the development of seismic acquisition technology, high productivity acquisition technology has been widely accepted by oil companies in the world. Usually, there is a large demand for the number of vibrators in high productivity acquisition projects. For a large number of vibrators...

... Full waveform inversion (FWI), as an optimization-based approach in estimating subsurface models, is limited by incomplete acquisition and illumination of the subsurface. Adding data corresponding to new and independent ray paths as input could lead to significant increases in the reliability...