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US 4,072,922 AGranted
Method for seismic exploration for enhanced results in simulated cylindrical or plane waves
AssigneeSeiscom Delta Inc.
InventorsM. Turhan Taner, Robert E. Sheriff, H. Neal Reeves
Life of this patent
Estimating the term…
Abstract
Seismic sources or source arrays and seismic detectors or detector groups are arranged and spaced with respect to each other during the seismic survey to enhance simulation of plane waves or cylindrical waves, and also to reduce undesirable effects of horizontally travelling seismic noise.
Claims12
A method of seismic surveying to simulate travel of a seismic wave through seismic horizons in the earth, comprising the steps of:
- a. establishing a seismic source at a position to emit seismic waves into the earth;
- b. establishing seismic sensors along at least one line sensor array of length greater than or equal to the diameter of a circular region for the deepest horizon of interest in which all raypaths for seismic waves from the seismic source at a highest frequency of interest differ in phase from each other by less than one-half wavelength at such highest frequency of interest;
- c. emitting seismic waves from the seismic source;
- and
- d. sensing the response of the seismic horizons to the emitted waves at the sensors so that the responses sensed at the receivers contribute to, and supplement each other due to the difference in their phase.
2 more elements
A method of split spread seismic surveying of seismic horizons, comprising the steps of:
- a. establishing a continuous array of seismic sensors along the seismic line of profile over a distance greater than or equal to the diameter of a circular region for the deepest horizon of interest in which all raypaths for seismic waves at a highest frequency of interest in the seismic signal from the seismic source differ in phase from each other by less than one-half wavelength at such highest frequency of interest;
- b. establishing a seismic source at the midpoint of the continuous array;
- c. emitting seismic waves from the seismic source;
- and
- d. sensing the response of the seismic horizon to the emitted waves with the continuous array of seismic sensors.
2 more elements
Dependencies are inferred from the claim text.