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AssigneeStatoil ASA
InventorsSascha Bussat, Peter Hanssen, Simone Patricia Kugler
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A passive method for exploring a region below the surface of the earth. The method comprises using a single sensor located in turn at a plurality of locations to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or equal to substantially 1 Hz. The data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. For example, the seismic data may be filtered and may be subjected to amplitude normalization before being transformed into the frequency domain. The energy measure may then be calculated by integrating the spectrum in the frequency domain over a desired frequency range. The resulting calculated energy provides information about the region of the earth being explored.
A method of exploring a region below a surface of the Earth, comprising using a single sensor located in turn at a plurality of locations to obtain seismic data by recording ambient seismic interface waves in a frequency range whose lower limit is greater than or equal to 0 Hz and whose upper limit is less than or equal to substantially 1 Hz, and processing the data to obtain a measure of the energy in a frequency band within the frequency range.
(canceled)
Dependencies are inferred from the claim text.