Last year we introduced Distributed Acoustic Sensing (DAS) as a new method for VSP acquisition. In DAS, an optical fiber along the borehole serves as a seismic receiver array. The fiber is interrogated by a special device at the surface, sometimes referred to as lightbox.

Dec 14, 2020 · Abstract: Distributed acoustic sensing (DAS) is a novel technology, which has the advantages of full well coverage, high sampling density, and strong tolerance to harsh environments. However, compared with conventional geophones, the signal-to-noise ratio (SNR) of vertical seismic profile (VSP) data obtained using DAS is low, and there are many ...

Aug 30, 2016 · Fiber optic Distributed Acoustic Sensing (DAS) technology for seismic data acquisition has rapidly developed recently. The DAS-VSP is a special seismic method. In this method, the fiber cable is placed in borehole.

In this work, we propose a ground-truth-free method for strong background noise suppression in DAS vertical seismic profiling (DAS-VSP) data. Compared to existing deep learning (DL) methods, the proposed approach demonstrates promising generalizability in handling field examples across different surveys.

Distributed acoustic sensing (DAS) is a rapidly evolving fiber-optic sensing technology that converts any standard fiber-optic cable into a distributed sensor capable of measuring acoustic events every meter over large (100 km+) distances.

Mar 12, 2025 · The integration of DAS recording with vertical seismic profiling (VSP) has become increasingly prevalent across various applications of borehole geophysics. In seismic imaging and inversion of VSP data, it is essential to decompose the up/down-going and P/S-wave modes as necessary preconditioning steps.

Zero-offset vertical seismic profile (VSP) data were acquired by both retrievable (wireline) geophones and distributed acoustic sensing (DAS) on cemented-in fiber-optic cable. Side-by-side comparisons of these data sets are shown at several steps in the processing flow to help understand the advantages of each of these data types.

Last year we introduced Distributed Acoustic Sensing (DAS) as a new method for VSP acquisition. In DAS, an optical fiber along the borehole serves as a seismic receiver array. The fiber is interrogated by a special device at the surface, sometimes referred to as lightbox.

Nov 1, 2024 · The acquisition of vertical seismic profiles (VSPs) using distributed acoustic sensing (DAS) has made VSP acquisition a robust technique and a cost-effective tool for reservoir imaging and monitoring. However, VSP acquisition also brings …

Mar 1, 2023 · Distributed acoustic sensing (DAS) vertical seismic profiling (VSP) is, a new combined method of borehole seismic exploration, that has the advantages of low cost, high resistance to temperature and pressure, and high sampling rate.