System and method for electromagnetic wavefield resolution
First Claim
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1. A method of determining the nature of strata beneath the seabed comprising applying an electromagnetic (EM) wavefield to the strata;
- detecting an EM wavefield response; and
processing the wavefield by resolving the wavefield to produce upgoing and downgoing components then analyzing the upgoing component, thereby deriving the nature of the strata;
wherein the wavefield is resolved using the 2.5D assumption that there are no variations in the medium parameters in the cross-profile direction.
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Abstract
A method of processing an electromagnetic wavefield response in a seabed logging operation. The wavefield is resolved into upgoing and downgoing components. The downgoing component represents reflections from the sea surface while the upgoing component represents reflections and refractions from subterranean strata. The upgoing component is then subjected to analysis.
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Citations
16 Claims
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1. A method of determining the nature of strata beneath the seabed comprising applying an electromagnetic (EM) wavefield to the strata;
- detecting an EM wavefield response; and
processing the wavefield by resolving the wavefield to produce upgoing and downgoing components then analyzing the upgoing component, thereby deriving the nature of the strata;
wherein the wavefield is resolved using the 2.5D assumption that there are no variations in the medium parameters in the cross-profile direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- detecting an EM wavefield response; and
Specification