Q-compensated full wavefield inversion
AssigneeExxonMobil Upstream Research Company
InventorsHongchuan Sun, Eric G. Wildermuth, Jonathan Liu, Reeshidev Bansal, Spyridon K. Lazaratos
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Abstract
A method, including: obtaining a velocity model generated by an acoustic full wavefield inversion process; generating, with a computer, a variable Q model by applying pseudo-Q migration on processed seismic data of a subsurface region, wherein the velocity model is used as a guided constraint in the pseudo-Q migration; and generating, with a computer, a final subsurface velocity model that recovers amplitude attenuation caused by gas anomalies in the subsurface region by performing a visco-acoustic full wavefield inversion process, wherein the variable Q model is fixed in the visco-acoustic full wavefield inversion process.
Claims11
A method, comprising:
- obtaining a velocity model generated by an acoustic full wavefield inversion process;
- generating, with a computer, a variable Q model by applying pseudo-Q migration on processed seismic data of a subsurface region, wherein the velocity model is used as a guided constraint in the pseudo-Q migration;
- generating, with a computer, a final subsurface velocity model that recovers amplitude attenuation caused by a gas anomaly in the subsurface region by performing a visco-acoustic full wavefield inversion process, wherein the variable Q model is fixed in the visco-acoustic full wavefield inversion process;
- generating a subsurface image based on the final subsurface velocity model, wherein the subsurface image includes geological structure beneath the gas anomaly;
- and
- drilling a well to extract the hydrocarbons, wherein the well is disposed at a location determined by analysis of the subsurface image.
Dependencies are inferred from the claim text.