Systems And Methods For High-Resolution Travel Time And Move-Out Velocity Estimation Using Downhole Linear Receiver Arrays

A method for borehole measurements, comprising:

• receiving one or more signals from a linear receiver array;
• isolating a first arriving energy;
• assigning a reference receiver as a matched filter;
• performing a cross-correlate filter with one or more receivers;
• computing a relative travel time shift;
• aligning a first arrival energy;
• assigning an average of aligned first arrival energy as the matched filter;
• evaluating a convergence;
• combining a reference pick time with a relative time;
• and
• determining a travel time.

A system for borehole measurements comprising:

• a conveyance;
• a bottom hole assembly attached to the conveyance;
• a linear receiver array, wherein the linear receiver array is disposed on the bottom hole assembly;
• and
• a computer system connected to the linear receiver array and configured to:
• compute an arctan of a Hilbert Transform;
• isolate a first arriving energy;
• select a reference instantaneous phase on a reference receiver;
• find the reference instantaneous phase for the linear receiver array;
• compute a relative travel time shift;
• combine a reference pick time with a relative time;
• and
• determine a travel time.