METHOD AND SYSTEM FOR COLLECTING SEISMIC DATA

FIELD: geophysics.SUBSTANCE: proposed technical solution relates to the field of geophysics, namely to methods and devices aimed at studying the characteristics of the deep structure, and can be used for seismic exploration. A method for collecting seismic data is proposed, characterized by the impact on the surface of the investigated surface by sources of seismic signals following predetermined trajectories, synchronization of the clock of the sources and the recording device, and continuous recording of signals issued by the receivers. Moreover, before collecting the signals, the number of simultaneously operating signal sources N and the trajectory of their movement, the excitation density per unit length of the trajectory niof each of the Nisignal sources, the signal amplitude A0Nand the level of random noise Anare set. For each of the Ni-signal sources, the initial speed of movement V0i= fсi/ niis calculated and set, where fсiis the pulse repetition frequency of each of the Ni-signal sources, while fсi= 1/Treadi, where Treadiis the signal source readiness period for re-excitation. The coordinates of each of the signal receivers are determined, and in the process of moving the signal sources, the surface is affected by pulses with a given repetition frequency fсiand amplitude A0i. On the continuous recording made by the receivers, the arrival times of elastic waves tarrnifrom each of the Ni-signal sources and their amplitude Aniare distinguished. The signal-to-noise ratios Аni/Аnare determined, the obtained data are compared with the data on the pulse times tknfrom each of the Ni-signal sources and the coordinates xknand yknof each of the pulses. The distribution of signal velocities in the earth's surface is determined and a model of the earth's surface is built, while with a decrease in the signal-to-noise ratio Аni/Аn, the excitation density niand their amplitudes А0iare increased without stopping the movement of the signal sources.EFFECT: increased productivity of collection and processing of seismic data with high resolution.9 cl, 1 dwg Предложенное техническое решение относится к области геофизики, а именно к способам и устройствам, направленным на изучение характеристик глубинного строения, и может быть применено для сейсмической разведки. Предложен способ сбора сейсмических данных, характеризующийся воздействием на исследуемую поверхность источниками сейсмических сигналов, следующих по заранее определенным траекториям, синхронизацией часов ист