Technology and system of noise monitoring in the latent period of origin of anomalous seismic processes

In control systems during this period because of filtration of the noise the part of the diagnostic information is lost and useful signal is deformed. It is demonstrated that in the latent period of transition into the emergency state due to such defects as tear and wear, cracks, bending, fatigue etc., noise appear in signals; coefficients of correlation between useful signal and noise change, as well as their range, variance and other characteristics; stationary condition and normalcy of distribution law are violated. A part of diagnostic information is lost in the systems in this period due to filtration and the useful signal is distorted. As a result, the emergency state is detected only in its express form. In many cases, it is late, which leads to numerous failures. The offered noise technology allows one to eliminate the above-mentioned errors and to use noise as carriers of diagnostic information. Therefore, they provide adequacy and reliability of monitoring of failures in their latent period. It was confirmed through the application of these technologies at numerous many oil-production objects. For instance, the noise analysis of seismic-acoustic station installed at the head of a suspended oil well at Gum Island in the Caspian Sea allowed one to establish that estimates of noise variance, joint correlation function between the useful signal and the value of noise correlation increased sharply within 5-10 hours within a radius of over 150-200 km in the latent period of all earthquakes from 01/05/2010 to 01/05/2011.