METHOD FOR MOBILE SEARCH OF HYDROCARBON DEPOSITS AND BOTTOM OBJECTS, DETECTING SIGNS OF OCCURRENCE OF HAZARDOUS PHENOMENA AT SEA SHELF Russian patent published in 2016 - IPC G01V9/00 G10K11/00 

FIELD: geophysics.

SUBSTANCE: invention relates to geophysical methods of analysis of marine environment and is intended for mobile searching for oil and gas deposits, bottom objects of various purposes, far anticipatory detecting signs of occurrence of dangerous sea phenomena (destructive earthquakes and tsunami waves) at sea shelf. Summary: method for mobile search of hydrocarbon fields, bottom objects, remote detection of signs of occurrence of dangerous sea effects at sea shelf comprises irradiating controlled marine environment in horizontal plane with low-frequency luminal, and in vertical plane with probing high-frequency acoustic signals and formation in area of their crossing working zone of "triple" nonlinear interaction and parametric conversion of waves of low-frequency and high-frequency pumping medium and measured information waves, radiated by search hydrocarbon deposits, wherein underwater receiving acoustic unit is made from two horizontally spaced apart receivers and is placed in centre of investigated water area, wherein radiating unit employs low-frequency and high-frequency acoustic radiators, wherein radiating unit is placed on mobile carrier, which when searching for sources of information waves is moved along border of investigated water area, using it is formed vertical and horizontal parametric antenna, first of which is located in direction of sea bed and other in direction of receiving unit, wherein waves of probing high-frequency signal, interacting with measured information signals, receiving horizontally spaced apart receivers pervious parametric antennae, amplified in each channel in frequency band parametric conversion, their phase difference signals are measured and their time scale in high-frequency domain, narrow-band spectra thereof, determined in them and parametric components of upper and lower side bands at which, based on parametric and frequency-time conversion of pumping waves, as well as directions of parametric antennae is restored and characteristics of measured information fields corresponding to search criteria of hydrocarbon deposits, for example frequency range, intensity, space-time and spectral structure, as well as determined and fixed direction of their maximum development. Then radiating unit is moved in point where receiving unit is located, then passed specified sources of information signals along this course and length of deposit along it, similarly to displace moving carrier variable tacks repeatedly crosses each course line determined circuit of hydrocarbon deposit area, monitoring and measurement of signs of space-time dynamics of their characteristics, from which identifying measured information waves by their belonging to aqueous geodetic or bottom geophysical. Upon detecting geophysical waves and measuring their spectral characteristics results are compared with generalised reference spectra and identity information waves to specific types of hydrocarbon accumulations, e.g. gas, gas condensate or deposits with inflow of gas, pumping of marine environment in vertical plane of acoustic signals is high-frequency electromagnetic signals, wherein identification and extraction of information waves on background noise of investigated water area is performed taking into account known information on probable characteristics of these fields on basis of information-analytical technologies.

EFFECT: technical result is providing mobile search of hydrocarbon deposits on sea shelf with high accuracy of determining area of its occurrence at sea bottom, with high reliability of identifying measured information fields.

3 cl, 13 dwg