Patent ID: 9542359
Date: 2017-01-10
CPC Classifications: G01V,G06F

Claim:
1. A method for volume imaging of physical properties of an examined medium from geophysical field data measured from geophysical surveys deployed as fixed arrays or using a moving platform based on a superposition of sensitivities from all integrated sensitivity subdomains determined for corresponding subsets of an entire geophysical survey, the method comprising: a. placing at least one source of a geophysical field in at least one position on at least one data acquisition system deployed as a fixed array or from a moving platform; b. measuring at least one component of geophysical field data with one or more sensors located in one or more receiving positions along one or more survey lines performed by the at least one data acquisition system; c. selecting one or more subsets of a geophysical survey comprising the one or more survey lines performed by the data acquisition system, the selected one or more subsets being based on a pairing of the at least one source and the one or more sensors located in the one or more receiving positions; d. determining integrated sensitivity subdomains for the pairing of the at least one source and the one or more sensors of the selected one or more subsets of the geophysical survey by calculating one or more volumes where an integrated sensitivity of the selected one or more subsets is greater than a given threshold, wherein those volumes where the integrated sensitivity of the selected one or more subsets is greater than the given threshold are included in the sensitivity subdomains; e. calculating a sensitivity of geophysical data collected by the selected subsets of the geophysical survey corresponding to the integrated sensitivity subdomains; f. calculating a total sensitivity for the entire geophysical survey as the superposition of the sensitivities calculated for all of the integrated sensitivity subdomains; g. constructing a 3D volume image of the corresponding physical property of the examined medium by applying inversion/migration imaging to the geophysical data measured by the at least one data acquisition system using the total sensitivity calculated as the superposition of the sensitivities from all of the integrated sensitivity subdomains; and h. selecting one or more geographical formations and/or man-made objects for further exploration based on the constructed 3D volume image, the selection specifying which portion of the examined medium that the selected one or more geographical formations and/or man-made are located.