1-20 of 23
Keywords: gauge length
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4094273
... this, we installed and tested a buried experimental multi-component fiber sensor called the “Pretzel” at the Carbon Management Canada Newell County Facility in 2018, consisting of two 10x10 m horizontal squares of fiber. The 10 m sides of the Pretzel are longer than the 7 m gauge length that we typically...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582649
... acquisition period, several gauge survey as well as ambient seismic data including several lengths ranging from 10 to 100 meters were tested. Longer earthquakes. Although the fiber was installed over twenty gauge lengths provide greater sensitivity, while shorter years earlier, good signal quality...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3567899
...-depth curves extracted from the simulated DAS and geophone records produce comparable results. We further analyze the effect of DAS acquisition parameters and source offset on traveltimes and inverted velocities. We show the importance of using a small gauge length of 1-2 m for accurate characterization...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3579450
... of zerooffset DAS VSP. The resolution of the final algorithm is defined by DAS channel spacing and gauge length rather than by the frequencies of the seismic wavelet. We validate the algorithm in a synthetic example, inspired by a complex near-surface model from the desert environment, and a field data test...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3576626
... synthetic wavefields with fine spatial sampling. The fit-for-purpose strain averaging methodology models the response of shaped fibers and the gauge length’s smoothing effect in a consistent manner. We model DAS seismic gathers for surface and borehole seismic acquisitions, examine their properties...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594961
... Distributed acoustic sensing uses optical fibre to measure strain or strain rate along to the fibre direction. The strain rate estimated by distributed acoustic sensing is related to the total displacement of a section of the fibre called gauge length. By using this link between strain rate...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428048
... reservoir characterization production logging connector loss lead-in fiber production monitoring otdr trace show reflection production control upstream oil & gas gauge length fiber seismological application seg international exposition exploration geophysicist 10 long-range challenge...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428141
... projects is discussed. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 2:40 PM Location: 361F Presentation Type: Oral reservoir surveillance distributed acoustic sensing gauge length subsea system upstream oil & gas presented production...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3419338
... seismic profile datasets with precision timing from common energy sources. An algorithm for automatic extraction of signal and noise spectra from these data has been developed to quantitatively characterize the effect of gauge length and leading cable length on the signal-to-noise ratio (SNR). Monday...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3419066
... A series of tests have been conducted at the Aramco Houston Research Center (HRC) fiber-optic test facility, assessing the influence of DAS gauge length (GL) on VSP data. This study demonstrates this influence in a shallow (1500 ft) test well equipped with geophones and fiber-optic cables...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424622
... workflows. function. DAS acquisition pulse-width effects are considered small and neglected. Introduction DAS strain measurement is equal to the axial strain along the Distributed acoustic sensing (DAS) has been commonly fiber scaled by a normalized sinc function. As gauge length, used for vertical seismic...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427798
... gauge lengths relative to the fiber wind required for meaningful signal-to-noise ratio of acquired DAS data, the directional information supplied by shaped fibers is limited. The gauge length in relation to fiber shape is also expected to significantly affect parameter resolution. With this in mind we...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215957
... amplitude factors for true amplitude DAS VSP imaging. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Time: 2:40 PM Location: 221C Presentation Type: Oral anisotropic modeling vsp data simulation receiver scale model gauge length waveform...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216304
...) was chosen to accommodate standard DAS gauge lengths; at this size, horizontal but not vertical strain rate components were sensed. Future versions designed for gauge lengths on the order of 2 m will permit 6-component estimation. Presentation Date: Monday, September 16, 2019 Session Start Time: 1:50 PM...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3208294
... with the noise train. The gauge length used in the interrogator unit affects the characteristics of the noise; longer gauge lengths spatially smear out the noise affecting more channels. This paper advances a deeper understanding of this noise so that it can be mitigated on the recorded VSP data. Presentation...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995870
... seismic with DAS technology comprise a sensing revolution that addresses long-standing near-surface issues in land seismic without compromising the deeper imaging. gauge length dispersion curve sparse seg international exposition cable acquisition upstream oil & gas conventional point...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995883
... reflection imaging acquisition system fiber gauge length das uphole geophone low-relief structure ABSTRACT We introduce the smart DAS uphole acquisition system using optical fiber as an alternative high-resolution and high-quality near-surface measurement. Distributed acoustic sensing (DAS...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997008
... characterization field test radial stress variation fiber annual meeting sensitivity fiber optic seg international exposition reservoir surveillance fiber response production monitoring production control production logging vibration gauge length coating Budiansky , B. , D. C...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997182
... Type: Oral strain tensor wavefield extrapolation gauge length sava seg international exposition configuration reservoir characterization optical fiber design parameter reconstruction upstream oil & gas fiber displacement vector imaging strain projection straight optical fiber...

Product(s) added to cart

Close Modal