Patent
Method of using cascaded sweeps for source coding and harmonic cancellation
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TLDR
In this paper, a method of seismic surveying using one or more vibrational seismic energy sources activated by sweep signals is proposed, where the highest order harmonic that has sufficient strength to cause significant harmonic distortion of a sweep segment is determined and a number of sweep segments in excess of the number of sources is selected.Abstract:
A method of seismic surveying using one or more vibrational seismic energy sources activated by sweep signals The highest order harmonic that has sufficient strength to cause significant harmonic distortion of a sweep segment is determined A number of sweep segments in excess of the number of sources is selected Initial phase angles are selected for each sweep segment of each seismic energy source so that substantially all harmonics up to and including the highest order harmonic are suppressed Using cascaded sweeps, seismic data are acquired and processed to substantially attenuate harmonics upto the selected orderread more
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PatentDOI
Coding and decoding: seismic data modeling, acquisition and processing
TL;DR: In this article, a method for coding and decoding seismic data acquired, based on the concept of multishooting, is disclosed, which can be used to acquire and process real seismic data in the field or in laboratories, and to model and process synthetic data.
Patent
Methods for acquiring and processing seismic data from quasi-simultaneously activated translating energy sources
TL;DR: In this article, a constellation of seismic energy sources are translated along a survey path to generate a series of superposed wavefields, and the time delay is varied between each of the spaced apart activation locations.
Patent
Method of seismic surveying
TL;DR: In this article, the authors proposed a seismic surveying method in which the vibrators in a first vibrator group are actuated at time T 0 and the vibrator in a second group are acteduated at T 1, where T 0 is the sweep time of the first group and L is the listening time.
Patent
Iterative inversion of data from simultaneous geophysical sources
Jerome R. Krebs,John E. Anderson,Ramesh Neelamani,Charlie Jing,David L. Hinkley,Thomas A. Dickens,Christine E. Krohn,Peter Traynin +7 more
TL;DR: In this article, a method for reducing the time needed to perform geophysical inversion by using simultaneous encoded sources in the simulation steps of the inversion process is presented, where the geophysical survey data are prepared by encoding (3) a group of source gathers, using for each gather a different encoding signature selected from a set of non- equivalent encoding signatures.
Patent
Shaped high frequency vibratory source
TL;DR: In this paper, a deconvolution filter is computed from the impulse response (5) and from the vibrator signatures (4) from multiple vibrators and sweeps (1).
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Patent
High fidelity vibratory source seismic method with source separation
TL;DR: In this article, a method of separating the effects of the earth response on vibratory energy from individual ones of multiple vibrators (Va-Vd) to geophones (G1-G5), in generating a seismic survey, is disclosed.
Patent
Simultaneous performance of multiple seismic vibratory surveys
TL;DR: In this article, a plurality of vibratory sources transmit signals into the earth, except that an offset phase of the signal is selectively shifted for successive transmissions, to enable the signal from each vibratory source to be recovered by data processing.
PatentDOI
Seismic data acquisition technique having superposed signals
TL;DR: In this article, the pilot signals for each vibrator source are generated for each of the separate vibrator seismic sources concurrently in a sequence of at least four sweeps in order to reduce the time required for acquiring the data for a seismic survey.
PatentDOI
Simultaneous use of pseudo-random control signals in vibrational exploration methods
TL;DR: In this article, a method for deriving seismic information through the simultaneous operation of a plurality of vibrational seismic energy source systems such that the information produced by each source system may be separated from the combined recorded information is presented.
Patent
Method of source coding and harmonic cancellation for vibrational geophysical survey sources
TL;DR: In this paper, a method for significantly reducing the distortion and crossfeed from any selected order harmonic for any number of vibratory seismic sources operated concurrently, at the same time providing for separation of the signals from the different sources and for improving the signal-to-noise ratio is provided.