Systems and methods for detecting shallow buried objects
First Claim
1. A method of subsurface imaging, comprisingproviding an array of nodes including, at least a first node and a second node that are each capable of emitting and detecting signals;
- andacquiring a set of array seismic data by, iteratively;
positioning the array of nodes adjacent a surface, at a first location,emitting a source signal by the first node at the first location and detecting a first response signal by the second node, thereby acquiring a first set of seismic data corresponding to the first location,emitting a source signal from at least the second node in the array of nodes and receiving a response signal in at least the first node in the array of nodes, thereby acquiring a second set of seismic data corresponding to the first location.
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Abstract
The invention relates to a seismic system having an array of nodes, each capable of emitting and detecting seismic signals. The array of nodes is mounted on a mobile platform in a certain geometry and is configured to acquire subsurface data, and more particularly detect shallow buried objects, while being translated over a surface. Such a seismic system allows for high subsurface point redundancy by providing a large number of channels of data used to sum the energy at a point in the subsurface. In other aspects, the invention relates to methods for processing the acquired data to increase signal-to-noise ratio. In still other aspects, the invention relates to methods for imaging the data for visualization on a display.
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Citations
28 Claims
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1. A method of subsurface imaging, comprising
providing an array of nodes including, at least a first node and a second node that are each capable of emitting and detecting signals; - and
acquiring a set of array seismic data by, iteratively; positioning the array of nodes adjacent a surface, at a first location, emitting a source signal by the first node at the first location and detecting a first response signal by the second node, thereby acquiring a first set of seismic data corresponding to the first location, emitting a source signal from at least the second node in the array of nodes and receiving a response signal in at least the first node in the array of nodes, thereby acquiring a second set of seismic data corresponding to the first location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for imaging a subsurface volume, comprising
an array of nodes, including at least a first node and a second node, each capable of emitting and detecting signals, for acquiring a set of array seismic data, and a computer in communication with the array of nodes for processing and imaging the acquired data, wherein array of nodes is adapted to acquire a first set of seismic data by emitting a source signal from the first node and detecting a response signal at the second node, and a second set of seismic data by emitting a source signal from the second node and detecting a response signal at the first node, and wherein the computer is configured to identify imperfections in the first and second sets of seismic data and image the subsurface by removing imperfections in at least one of the first and the second sets of seismic data.
Specification