METHOD OF HYDROCARBONS PROSPECTING Russian patent published in 2010 - IPC G01V1/00 

FIELD: mining.

SUBSTANCE: seismic receivers performing basic measurements are arranged at 50-1000 m one from another. Amplitude identity of seismic receivers is compared to a measuring tract. Daily variations of amplitudes of micro-seismic wave field are recorded by means of a stationary seismic station registering microseism during whole period of operations at prospected territory. Seismic oscillations in the range of frequencies 0.1-20 Hz are registered simultaneously for all measured components. Time span of the signal measured at prospected area is divided into discrete sections synchronised in time for all seismic receivers. Corresponding to each discrete section spectral-time responses are calculated forming digital string. Each discrete section is analysed for presence of interference of anthropogenic nature and for presence of an information signal. Also as the informational signal there is accepted a signal uniform in power with duration not less, than 60 min and free of anthropogenic interferences. Discrete sections with the said interferences are excluded from further investigation. The rest discrete sections are subject to spectral-time analysis. There are calculated dynamic characteristics of spectres of information signals power. There is plotted spectre of dispersions of spectral lines of information signals power. Increase of amplitude of spectral lines in dispersion spectre testifies to presence of hydrocarbon deposit. Also there is determined occurrence depth of producing formation.

EFFECT: increased reliability of results.

7 cl, 7 dwg