Spiral waveform analysis for behind pipe cement evaluation, well abandonment operations and complex annular environments
In general, in one aspect, embodiments relate to a method and/or system that includes disposing a cement bond logging tool into a wellbore. The method and/or system comprising: a cement bond logging tool comprising: two or more transmitters configured to transmit an acoustic wave from cement bond logging tool; and an array of receivers configured to receive a refracted waveform; and an information handling system configured to process the refracted waveform from the array of receivers into a cement bond property log.
1 . A system comprising:
a cement bond logging tool comprising:
two or more transmitters configured to transmit an acoustic wave from cement bond logging tool; and
an array of receivers configured to receive a refracted waveform; and
an information handling system configured to process the refracted waveform from the array of receivers into a cement bond property log utilizing at least some spiral sampling comprising comparing a baseline receiver with its nearest receiver.
2 . The system of claim 1 , wherein the array of receivers comprises a first hydrophone and a second hydrophone.
3 . The system of claim 2 , wherein the two or more transmitters comprise an upper-near monopole and a lower-near monopole.
4 . The system of claim 3 , wherein spacing between the first hydrophone and the second hydrophone is 0.5 feet and 45 degrees apart.
5 . The system of claim 4 , wherein spacing between the first hydrophone and the lower-near monopole is 1 foot.
6 . The system of claim 5 , further comprising a far monopole, a dipole X, a dipole Y, and an upper far monopole.
7 . The system of claim 6 , wherein spacing between first hydrophone and the far monopole is 7.5 feet.
8 . The system of claim 6 , wherein spacing between first hydrophone and the dipole X is 9 feet.
9 . The system of claim 6 , wherein spacing between first hydrophone and the dipole Y is 10 feet.
10 . The system of claim 6 , wherein spacing between first hydrophone and the upper far monopole is 14 feet.
11 . The system of claim 1 , wherein the array of receivers comprises thirteen hydrophones.
12 . The system of claim 11 , wherein each receiver in the array of receivers is spaced 0.5 feet apart such that the array of receivers is 6 feet.
13 . A method comprising:
disposing a cement bond logging tool into a wellbore, wherein the cement bond logging tool comprises:
two or more transmitters configured to transmit an acoustic wave from cement bond logging tool; and
an array of receivers configured to receive a refracted waveform; and
processing the refracted waveform from the array of receivers into a cement bond property log utilizing at least some spiral sampling comprising comparing a baseline receiver with its nearest receiver.
14 . The method of claim 13 , wherein the array of receivers comprises a first hydrophone and a second hydrophone.
15 . The method of claim 14 , wherein the two or more transmitters comprise an upper-near monopole and a lower-near monopole.
16 . The method of claim 15 , wherein spacing between the first hydrophone and the second hydrophone is 0.5 feet and 45 degrees apart.
17 . The method of claim 16 , wherein spacing between the first hydrophone and the lower-near monopole is 1 foot.
18 . The method of claim 17 , further comprising a far monopole, a dipole X, a dipole Y, and an upper far monopole.
19 . The method of claim 18 , wherein spacing between first hydrophone and the far monopole is 7.5 feet.
20 . The method of claim 18 , wherein spacing between first hydrophone and the dipole X is 9 feet.