Acoustic imaging using collocated pressure and pressure gradient data measurements
AssigneeExion Technologies Corp.
InventorNikolaos BERNITSAS
Life of this patent
Estimating the term…
Abstract
Embodiments herein describe techniques for performing acoustic imaging when collocated pressure and three-directional pressure gradient measurements are available. Such measurements become available through the use of a hydrophone and a 3-component geophone or accelerometer when the containing node is neutrally buoyant, or nearly neutrally buoyant, and is coupled to the water column, rather than grounded and thus coupled to the ocean bottom sediments.
Claims23
A method comprising:
- recording acoustic data using a floating sensor node that contains a pressure sensor and a motion sensor;
- and
- processing the acoustic data to obtain a velocity model or to generate an image using two-way wave equation propagation, where a directional receiver back propagates a wave in a reverse direction a pressure wave was received at the floating sensor node when the acoustic data was recorded.
A non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by one or more computer processors to perform an operation, the operation comprising:
- receiving acoustic data recorded using a floating sensor node that contains a pressure sensor and a motion sensor;
- and
- processing the acoustic data to obtain a velocity model or to generate an image using two-way wave equation propagation where a directional receiver back propagates a wave in a reverse direction a pressure wave was received at the floating sensor node when the acoustic data was recorded.
A non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by one or more computer processors to perform an operation, the operation comprising:
- receiving acoustic data recorded using a floating sensor node that contains a pressure sensor and a three-axis motion sensor;
- scaling a vertical component measured by the three-axis motion sensor with a combination of two horizontal components and the vertical component measured by the three-axis motion sensor to generate a scaled vertical component;
- and
- performing P-Z summation or P-Z subtraction based on the scaled vertical component and a pressure measured by the pressure sensor.
Dependencies are inferred from the claim text.