MICROSEISM ORIGINS AND INTERACTION WITH THE GEOLOGICAL ENVIRONMENT

Use of natural microseismic radiation of the Earth for identification and modelling of the geological environment and the definition of the sources origin and propagation character in the earth's crust were analyzed. The features of the formation and propagation of low-frequency seismic signals of lithospheric origin (microseism) were examined. The propagation ranges of microseismic waves in the Earth's crust were analyzed. Examples of using of interaction of low frequency seismic signals with the inner structure of the Earth were given in this paper. The conditions for the propagation of microseismic signals in the earth's crust, their distribution from heterogeneities of the geological environment were estimated. The paper studies the character of mapping of interaction of microseism with the geological structure on the daylight surface and its shape. Analysis of microseismic waves characteristics was carried out and the range, which is the most informative for further geological research, was defined. Consideration was given to different hypotheses about the effect of the presence of anomalies in low-frequency part of the microseism spectrum over natural oil and gas deposits. The relationship of oil and gas deposits with the frequency characteristics of microseismic waves was defined. The method of processing the identification of quantitative and qualitative parameters of oil and gas deposits based on the effect of the microseismic radiation propagation in the Earth's crust were studied. On the analysis basis it was concluded that the actual task was to define the central tenet of the theoretical model of the effect and its practical use. The use of models was carried out on a representative sample in order to use a comparative analysis of the data obtained. The application of techniques allows to reduce the time of geological and prospecting work and cut the cost of work. The practical application of the propagation effect model of the microseismic waves is possible for search and localization of hydrocarbon deposits, as well as the evaluation of the depth of occurrence of inhomogeneities, in particular oil and gas-bearing contours. The technique for three-dimensional geological modeling using remote sensing data can also be applied.