METHOD OF SEARCH AND PROSPECTING OF HYDROCARBON POOLS (VARIANTS) Russian patent published in 2017 - IPC G01V1/28 G01V1/30 

FIELD: oil and gas industry.

SUBSTANCE: according to the first version the method of search and prospecting of hydrocarbon pools consists in three-component seismic receivers placed at a distance from 100 meters to 10,000 meters relative to each other, information signals are registered and recorded with at least two three-component seismic receivers of low-frequency range with synchronous registration of information signals from three channels on three components (x, y, z) in frequency range from 0 Hz to 50 Hz. By measured components (x, y, z) for a period of time which is sufficient to record a statistically significant noise signal in the low-frequency range, the vector characteristics of the measured oscillation fields are calculated: the divergence, rotor, and vector product of horizontal components of received information signals. The presence or absence of hydrocarbon pools is evaluated by ratio of spectral power f1, f2 parameters in the range from 0 Hz to 7 Hz to spectral power of f1, f2 parameters in the range from 0 Hz to 7 Hz. According to the second version the method includes additional generation of seismic vibrations by geophones periodically generating oscillations for 30 -40 sec with a pause for 20 -30 seconds, and the judgment regarding the presence of hydrocarbon pools is provided if the correlation dimension of initial vector field of velocities (F) is in the registration mode the Earth`s seismic noise is greater than the correlation dimension of initial vector field of velocities (F) in the registration mode of information signals with the use of periodic vibrations of the seismic vibrator. According to the third version of the claimed method, the judgment on the presence of hydrocarbon deposits is provided if the correlation dimension of initial field rotor (E) in the registration mode the Earth`s seismic noise is greater than the correlation dimension of initial field rotor (E) in the registration mode of information signals with the use of periodic vibrations of the seismic vibrator.

EFFECT: more reliable detection of hydrocarbon pools.

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