3D distributed and dispersed source array acquisition and data processing

Abstract

Numerous field acquisition examples and case studies have demonstrated the importance of recording, processing, and interpreting broadband land data. In most seismic acquisition surveys, three main objectives should be considered: (1) dense spatial source and receiver locations to achieve optimum subsurface illumination and wavefield sampling; (2) coverage of the full frequency spectrum, i.e., broadband acquisition; and (3) cost efficiency. Consequently, an effort has been made to improve the manufacturing of seismic vibratory sources by providing the ability to emit both lower (approximately 1.5 Hz) and higher frequencies (approximately 120 Hz) and of receivers by utilizing single, denser, and lighter digital sensors. All these developments achieve both operational (i.e., weight, optimized power consumption) and geophysical benefits (i.e., amplitude and phase response, vector fidelity, tilt detection). As part of the effort to reduce the acquisition cycle time, increase productivity, and improve seismic imaging and resolution while optimizing costs, a novel seismic acquisition survey was conducted employing 24 vibrators generating two different types of sweeps in a 3D unconstrained decentralized and dispersed source array field configuration. During this novel blended acquisition design, the crew reached a maximum of 65,000 vibrator points during 24 hours of continuous recording, which represents significantly higher productivity than a conventional seismic crew operating in the same area using a nonblended centralized source mode. Applying novel and newly developed deblending algorithms, high-resolution images were obtained. In addition, two data sets (i.e., low-frequency and medium-high-frequency sources) were merged to obtain full-bandwidth broadband seismic images. Data comparisons between the distributed blended and nonblended conventional surveys, acquired by the same crew during the same time over the same area, showed that the two data sets are very similar in the poststack and prestack domains.

Distributed 3D Environment Design System Based on Color Image Model

“…Virtual reality technology can not only fully show the new expression, but also change the methods and concepts of architectural design. At present, virtual reality technology is widely used in the eld of architecture, especially in the elds of interior design and decoration [2,3]. Designers and customers can feel the indoor layout through indoor reality technology, decorate the virtual room with their own ideas, and change their position in the virtual room to observe the design e ect.…”

Seismic erratic noise attenuation using unsupervised anomaly detection

“…To examine the feasibility of the proposed workflow for a field data application, a 2D receiver line was extracted from a 3D land seismic field survey, which was acquired by unconstrained blended acquisition (Tsingas et al ., 2020). The data set is shown in Figure 9, which mainly suffers from vertically oscillating outliers that represent crosstalk noise in the blended receiver gather domain.…”

Structured Data Processing Method and Distributed Processing System Construction

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