Method for direct hydrocarbon reservoir detection and delineation by low frequency acoustic spectroscopy
AssigneeADNR Technology Services GmbH
InventorsGennadij J. Chutov, Ernst D. Rode, Juergen Moritz
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Abstract
A method for detecting and identifying a type and geometric dimensions of hydrocarbon deposits and other underground fluid deposits. Sensors are used to measure anomalies caused by a deposit in a natural earth frequency spectrum. Different frequencies are filtered out and analyzed, for respective deposits. Amplitudes of maxima are separately evaluated, corresponding to separately measured frequencies. Amplitude values of the maxima are placed into correlation with each other and measuring points are determined.
Claims10
In a method for detecting and for identifying a type and geometric dimensions of hydrocarbon deposits and other underground fluid deposits, the improvement comprising:
- sensors measuring anomalies caused by a deposit in a natural earth frequency spectrum;
- filtering out and analyzing different frequencies in a range between 0.1 Hz and 10 Hz characteristic for the respective deposits;
- in at least two different frequency ranges separately evaluating amplitudes of maxima of the separately measured frequencies;
- placing into a correlation with each other amplitude values of the maxima and determining measuring points, according to B i = AF1 i AF2 i ≥ 1
- wherein AF1 is an amplitude maximum in a hydrocarbon window and AF2 is an amplitude maximum in a water window, each one for an i-th measuring point.
Dependencies are inferred from the claim text.