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US 10,895,654 B2Granted
Method for generating optimized seismic target spectrum
AssigneeExxonMobil Upstream Research Company
InventorsKyle J. Basler-Reeder, Spyridon K. Lazaratos, Eugene C. Trantham, Michael P. Matheney
Life of this patent
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Abstract
A method, including: determining, with a computer, a reflectivity spectrum; generating, with a computer, a target spectrum that is a convolution of a roll-off function and the reflectivity spectrum; and filtering, with a computer, seismic data to cause the seismic data to have the target spectrum.
Claims8
A method, comprising:
- determining a reflectivity spectrum, wherein determining the reflectivity spectrum comprises:
- obtaining velocity and density well logs;
- generating impedance logs from the velocity and density logs;
- transforming the impedance logs into the frequency domain to create an impedance spectrum;
- generating a cross-plot of a log of frequency and a log of amplitude of the impedance spectrum;
- and
- fitting a line to the cross-plot and determining the reflectivity spectrum from the line;
- generating a target spectrum that is a convolution of a roll-off function and the reflectivity spectrum, wherein the roll-off function is a Gaussian function with a half-power width;
- filtering seismic data to cause the seismic data to have the target spectrum;
- and
- using the filtered seismic data to identify geological formations that are indicative of a presence of hydrocarbons.
8 more elements
Dependencies are inferred from the claim text.