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US 2026/0259342 A1Published application
Dipole beamforming stack
AssigneeSchlumberger Technology Corporation
InventorsNobuyasu Hirabayashi, Manish Lal Khaitan, Carlos Alejandro Arenas Arenas
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Abstract
A method for processing sonic waveforms may include an improved beamforming stacking method, wherein the improved beamforming stacking method comprises using different combinations of receivers by normalizing amplitudes of the waveforms given by subtraction of waveforms of a pair of receivers by receiver distance. An azimuth computation method is further disclosed for use in combination with the improved beamforming stacking.
Claims20
A method, comprising:
- activating a sonic tool and emitting a signal into a geological formation;
- receiving a plurality of reflected signals at the sonic tool, each of the plurality of reflected signals received at a respective receiver of a plurality of receivers on the sonic tool, each of the plurality of reflected signals having an associated waveform of a plurality of waveforms;
- and
- generating a plurality of stacked waveforms, each stacked waveform of the plurality of stacked waveforms associated with a virtual receiver of a plurality of virtual receivers, wherein generating each stacked waveform of the plurality of stacked waveforms includes:
- subtracting a first waveform of the plurality of waveforms from a second waveform of the plurality of waveforms, resulting in a subtracted waveform, wherein the first waveform is associated with a first receiver of the plurality of receivers and the second waveform is associated with a second receiver of the plurality of receivers;
- and
- dividing the subtracted waveform by a distance difference between a first distance for the first receiver and a second distance for the second receiver.
4 more elements
A method, comprising:
- identifying a plurality of virtual receivers for a sonic tool, the sonic tool including a plurality of receivers arranged around a housing;
- and
- using a plurality of waveforms generated from a plurality of sonic signals received at the plurality of receivers, generating a plurality of stacked waveforms by normalizing the plurality of waveforms based on a distance of the plurality of receivers, each of the plurality of stacked waveforms associated with an associated virtual receiver of the plurality of virtual receivers.
A system, comprising:
- a processor and memory, the memory including instructions that cause the processor to:
- activate a sonic tool and emitting a signal into a geological formation;
- receive a plurality of reflected signals at the sonic tool, each of the plurality of reflected signals received at a respective receiver of a plurality of receivers on the sonic tool, each of the plurality of reflected signals having an associated waveform of a plurality of waveforms;
- and
- generate a plurality of stacked waveforms, each stacked waveform of the plurality of stacked waveforms associated with a virtual receiver of a plurality of virtual receivers, wherein generating each stacked waveform of the plurality of stacked waveforms includes:
- subtract a first waveform of the plurality of waveforms from a second waveform of the plurality of waveforms, resulting in a subtracted waveform, wherein the first waveform is associated with a first receiver of the plurality of receivers and the second waveform is associated with a second receiver of the plurality of receivers;
- and
- divide the subtracted waveform by a distance difference between a first distance for the first receiver and a second distance for the second receiver.
5 more elements
Dependencies are inferred from the claim text.