Independent simultaneous sweeping ‐a method to increase the productivity of land seismic crews

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2008Independent simultaneous sweeping ‐a method to increase the productivity of land seismic crewsAuthors: Dave HoweMark FosterTony AllenBrian TaylorIan JackconsultantDave HoweBP, Mark FosterBP, Tony AllenBP, Brian TaylorBP, and Ian Jackhttps://doi.org/10.1190/1.3063932 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract It is well known that higher fold and increased sampling is a sure path to improved data quality, and that vibroseis productivity rates are often the limiting factor on land 3D surveys. We want to find ways to use multiple sources simultaneously, in order to make a step change in both sampling density and productivity. Recent developments in recording systems allow for a recording spread to be continually active, which will be referred to as continuous recording, although it may be more accurately described as recording of a set of contiguous records. This removes the necessity for real time synchronization of sources and recording systems. As long as the continuously recorded data and the source initiation can both be linked to the same time standard, (eg GPS time) the traditional shot records can be combed from the continuous dataset at any later stage. This new freedom allows us to operate any number of sources on a recording spread, without needing to coordinate their activity. In 2006 a test was conducted of a very simple simultaneous vibroseis method, which we call ISS (Independent Simultaneous Sweeping). In this method all vibrators worked independently without any attempt to synchronize their activity, and the underlying principle of this test was that all interference between sources should be treated as 'noise'. The noise was randomized as much as possible, and a standard suite of noise removal tools was used during processing. There was no requirement for specialized wavefield separation techniques. Other advanced vibroseis methods available in the industry were also tested in the field trial and we will contrast some of the results of using these methods compared to ISS in the presentation. The choice of sweep will affect the interfering noise and the three possible options of identical sweeps, varied sweep rates, and pseudo‐random sweeps will be the subject of a further field trial. In this simple and robust approach, there is no apparent limit to the number of sources that can be operated simultaneously, there is no waiting time for any vibrator, and very little requirement for central control or communication. It is very well suited for work in many environments including difficult terrain, where vibrator manoeuvering is slow, or where radio communication is challenged. An at‐scale implementation of the ISS method is currently being planned.Permalink: https://doi.org/10.1190/1.3063932FiguresReferencesRelatedDetailsCited ByUnlocking ultra-high-density seismic for CCUS applications by combining nimble nodes and agile source technologiesAmine Ourabah and Allan Chatenay4 January 2022 | The Leading Edge, Vol. 41, No. 1Iterative Deblending of Simultaneous-Source Seismic Data via a Robust Singular Spectrum Analysis FilterIEEE Transactions on Geoscience and Remote Sensing, Vol. 60Deblending and merging of 3D multi‐sweep seismic blended data8 December 2021 | Geophysical Prospecting, Vol. 71Practical considerations on planning, acquiring, and deblending a 3D triple-source surveyShangli Ou, Zachary Lawrence, Irina Gorysheva, Daniel Eke, Xiujun Yang, Vikas Gudipati, Lieve Vanneste, Gboyega Ayeni, Brian deMartin, and Alana Robinson1 September 2021Blended acquisition with temporally signatured/modulated and spatially dispersed source array: Relationship between acquisition productivity and processing performanceTomohide Ishiyama1 September 2021A direct noise attenuation approach in processing of land continuous recordsChengbo Li, Charles C. 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Verschuur11 June 2009 | GEOPHYSICS, Vol. 74, No. 4Independent simultaneous sweeping in Libya‐full scale implementation and new developmentsDave Howe, Mark Foster, Tony Allen, Ian Jack, Dave Buddery, Albert Choi, Ray Abma, Ted Manning, and Mike Pfister14 October 2009Survey Design for Blended AcquisitionGerrit Blacquière, Guus Berkhout, and Eric Verschuur14 October 2009 SEG Technical Program Expanded Abstracts 2008ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2008 Pages: 3713 publication data© 2008 Copyright © 2008 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 15 Dec 2008 CITATION INFORMATION Dave Howe, Mark Foster, Tony Allen, Brian Taylor, and Ian Jack, (2008), "Independent simultaneous sweeping ‐a method to increase the productivity of land seismic crews," SEG Technical Program Expanded Abstracts : 2826-2830. https://doi.org/10.1190/1.3063932 Plain-Language Summary PDF DownloadLoading ...