Methods and apparatus for determining slowness of wavefronts

摘要

Methods and apparatus for determining slowness of wavefronts. An example apparatus includes one or more sources spaced from a receiver. The one or more sources are to transmit one or more signals and the receiver is to receive at least a portion of the one or more signals. The apparatus includes a processor to process waveform data associated with the one or more signals by stacking waveforms of the waveform data based on to linear moveout and sinusoidal moveout.

主权项

1. A method, comprising:
transmitting signals from a plurality of sources, the sources spaced from an array of receivers of the downhole tool, the receivers spaced around a circumference of the downhole tool; obtaining waveform data associated with the signals received at one or more of the receivers; and processing the waveform data to determine three-dimensional slowness-time coherence representation of the waveforms; wherein, when processing the wavefront data, a radial slowness is to be equal to a slowness of a direct compressional arrival.