Single streamer deghosting with extended model space
AssigneeSchlumberger Technology Corporation
InventorsJames Rickett, Philippe Caprioli
Life of this patent
Estimating the term…
Abstract
A method for deghosting marine seismic streamer data includes receiving the marine seismic data recorded from a single streamer. A representation of an upgoing wavefield in the marine seismic data is defined. The representation of the upgoing wavefield includes a first wave component in a plane and a second wave component that is perpendicular to the plane. A linear system is built that models a wavefield using the representation. The wavefield includes the upgoing wavefield and a downgoing ghost wavefield. The upgoing wavefield is estimated, within the representation, by inverting the linear system.
Claims20
A method for deghosting marine seismic streamer data, comprising:
- receiving marine seismic data recorded from only one streamer;
- defining a representation of an upgoing wavefield of a line of pressure measurements along the one streamer in the marine seismic data, wherein the representation comprises a first wave component in a plane corresponding to the line of pressure measurements and a second wave component that is perpendicular to the plane, wherein the representation defines a portion of an ellipse in a k(x)−k(y) space of the first wave component and the second wave component, wherein a k(x) value defines a corresponding maximum k(y) value, and wherein a maximum phase difference between primary and ghost events of the upgoing wavefield and a downgoing ghost wavefield depends on the maximum k(y) value;
- building a linear system that models a wavefield using the representation, wherein the wavefield comprises the upgoing wavefield and the downgoing ghost wavefield;
- and
- estimating the upgoing wavefield by inverting the linear system.
A non-transitory computer-readable medium storing instructions that, when executed by one or more processors of a computing system, cause the computing system to perform operations, the operations comprising:
- receiving marine seismic data recorded from only one streamer;
- defining a representation of an upgoing wavefield of a line of pressure measurements along the one streamer in the marine seismic data, wherein the representation comprises a first wave component in a plane corresponding to the line of pressure measurements and a second wave component that is perpendicular to the plane, wherein the representation defines a portion of an ellipse in a k(x)−k(y) space of the first wave component and the second wave component, wherein a k(x) value defines a corresponding maximum k(y) value, and wherein a maximum phase difference between primary and ghost events of the upgoing wavefield and a downgoing ghost wavefield depends on the maximum k(y) value;
- building a linear system that models a wavefield using the representation, wherein the wavefield comprises the upgoing wavefield and the downgoing ghost wavefield;
- and
- estimating the upgoing wavefield by inverting the linear system.
A computing system, comprising:
- one or more processors;
- and
- a memory system comprising one or more non-transitory computer-readable media storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations, the operations comprising:
- receiving marine seismic data recorded from only one streamer;
- defining a representation of an upgoing wavefield of a line of pressure measurements along the one streamer in the marine seismic data, wherein the representation comprises a first wave component in a plane corresponding to the line of pressure measurements and a second wave component that is perpendicular to the plane, wherein the representation defines a portion of an ellipse in a k(x)−k(y) space of the first wave component and the second wave component, wherein a k(x) value defines a corresponding maximum k(y) value, and wherein a maximum phase difference between primary and ghost events of the upgoing wavefield and a downgoing ghost wavefield depends on the maximum k(y) value;
- building a linear system that models a wavefield using the representation, wherein the wavefield comprises the upgoing wavefield and the downgoing ghost wavefield;
- and
- estimating the upgoing wavefield by inverting the linear system.
Dependencies are inferred from the claim text.