METHOD AND SYSTEM FOR COLLECTING SEISMIC DATA Russian patent published in 2021 - IPC G01V1/02 G01V1/00 G01V1/09 G01V1/155 

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 n_i of each of the N_i signal sources, the signal amplitude A_0N and the level of random noise A_n are set. For each of the N_i-signal sources, the initial speed of movement V_0i= f_сi / n_i is calculated and set, where f_сi is the pulse repetition frequency of each of the N_i-signal sources, while f_сi = 1/T_readi, where T_readi is 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 f_сi and amplitude A_0i. On the continuous recording made by the receivers, the arrival times of elastic waves t_arrni from each of the N_i-signal sources and their amplitude A_ni are distinguished. The signal-to-noise ratios А_ni/А_n are determined, the obtained data are compared with the data on the pulse times t_kn from each of the N_i-signal sources and the coordinates x_kn and y_kn of 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 А_ni/А_n, the excitation density n_i and their amplitudes А_0i are 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