Servovalve improvements for seismic vibrators

PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsServovalve improvements for seismic vibratorsAuthors: Dennis ReustDennis ReustServo Force, LLC.Search for more papers by this authorhttps://doi.org/10.1190/segam2021-3594523.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractCurrent emphasis on low frequencies increases the incentive to deal with seismic vibrator limitations (Ollivrin and Tellier, 2019). New servovalve technology improves seismic vibrator signal quality, especially at very low frequencies, such as 0.1 to 6 Hz. Third-generation pressure feedback technology utilizes a more linear feedback method to correct output pressure errors. This servovalve demonstrates better control over the vibrator’s ground force waveform; consequently, the vibrator produces more fundamental energy as well as decreased noise and distortion at very low frequencies.Subtle changes in orifice synchronization reduce spikes in the vibrator’s hydraulic power supply and output signal. This reduces valve and actuator cavitation and raises average cylinder pressure. These improvements make the vibrator’s response more linear and make pressure feedback servovalves compatible with all vibrator controllers.A pilot valve with a voice coil type linear motor excels in bandwidth and stability, and it has less hysteresis than a traditional pilot. Upgrading a vibrator to a pilot and main servovalve, which provide more signal and less noise, can be a cost-effective path to superior data with less effort.Keywords: acquisition, vibroseis, low frequency, broadband, sourcesPermalink: https://doi.org/10.1190/segam2021-3594523.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Dennis Reust, (2021), "Servovalve improvements for seismic vibrators," SEG Technical Program Expanded Abstracts : 96-100. https://doi.org/10.1190/segam2021-3594523.1 Plain-Language Summary Keywordsacquisitionvibroseislow frequencybroadbandsourcesPDF DownloadLoading ...