Method for processing acoustic reflections in array data to image near-borehole geological structure
AssigneeBaker Hughes Incorporated
InventorsXiao Ming Tang, Yibing Zheng, Douglas J Patterson
Life of this patent
Estimating the term…
Abstract
A method and apparatus for enhancing the moveout between a direct wave and a reflected wave. The method involves transmitting imaging signals into a body to be imaged and receiving the resulting signals propagated from the signal source. The step of receiving the propagated signals includes selectively adjusting the distance between the signal source and the signal receivers between successive signals. The method further comprises separating the reflected signals from the total received signals and enhanced stacking of the measured reflected signals.
Claims15
A method of analyzing acoustic data obtained from a geological formation, said method comprising:
- receiving array acoustic data obtained by upwardly motivating a signal transmitter within a borehole piercing the geological formation, transmitting a series of signals from the signal transmitter to a geological bed, reflecting the signals from the formation to form a series of reflections, recording the reflections with a selected receiver of a receiver array, wherein with each successive recorded reflection, the distance is reduced between the transmitter and the successively selected receiver that records the reflection;
- obtaining moveout information from the array acoustic data estimating direct wave data from the array acoustic data and the moveout information;
- subtracting the direct wave data from the array acoustic data thereby obtaining residual data;
- and
- constructing an image of the geological formation from the residual data.
Dependencies are inferred from the claim text.