METHOD OF VIBRATIONAL SEISMIC SURVEY Russian patent published in 2017 - IPC G01V1/02 G01V1/28 

FIELD: physics.

SUBSTANCE: method of vibrational seismic survey based on the excitation and registration of seismic vibrations in the control of a reference signal by a vibration source of oscillations is proposed. According to the claimed solution, the reference signal is divided into intervals that are commensurate with each other in time duration. The duration of an individual interval is two orders of magnitude shorter than the duration of the reference signal. After that, the reference signal intervals are joined together in a new sequence, the place of each of the previously allocated intervals in this sequence being determined from a random number sensor. The new reference signal generated in this way is used as a control signal, when vibrations are emitted by a vibrator, and also for the formation of the correlation functions of the registered seismic records with this reference signal or for the deconvolution of records using an operator calculated from this reference signal. Quasi-random sequence of intervals of the original reference signal for different sources turns out different due to different starting values of the random number generator. Thus, it is possible to operate different sources of vibration simultaneously, for each of which a newly formed reference signal is characterized by a sequence of intervals divided by other newly generated signals, into which the original reference signal is divided. Thus, from seismic records obtained by simultaneous recording of signals emitted by different sources, it is possible, by mutual correlation or deconvolution with a reference signal tied to a specific vibration source, to extract exactly that portion of the record that is recorded from this vibration source. The initial reference signal, from which a new reference signal with a quasi-random sequence of intervals is formed, can be either calculated or recorded inside the medium or in the near-surface zone.

EFFECT: improving the quality and efficiency of the vibration seismic surveys.

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