Method of conducting a seismic survey
First Claim
1. A method of conducting a seismic survey of a geological feature comprising a plurality of zones, the method comprising applying a directional seismic source to each zone of the feature with a directivity angle equal to or close to a measured critical angle of the respective zone of the feature, wherein for each zone, the source directivity angle is constant and tuned to the critical angle of the respective zone, whereby the seismic source is a zone-based directional source, and wherein the seismic source comprises a series of seismic guns with different directivities tuned to different critical angles.
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Abstract
A method of conducting a seismic survey of an area including a region of high seismic velocity regimes in a shallow overburden. According to the method, a zone is identified in which the boundary of the high seismic velocity region has a substantially constant critical angle and a course is plotted through the identified zone. A zone based directional seismic source is applied sequentially, with a directivity angle equal to or close to the measured critical angle. The response is detected using receivers.
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16 Claims
- 1. A method of conducting a seismic survey of a geological feature comprising a plurality of zones, the method comprising applying a directional seismic source to each zone of the feature with a directivity angle equal to or close to a measured critical angle of the respective zone of the feature, wherein for each zone, the source directivity angle is constant and tuned to the critical angle of the respective zone, whereby the seismic source is a zone-based directional source, and wherein the seismic source comprises a series of seismic guns with different directivities tuned to different critical angles.
Specification