Acoustic corpuscular velocity in wellbore evaluation

Patent metadata

Field	Value
Publication number	US-11946358-B2
Application number	US-201916582727-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Mar 22, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A method for determining the presence and bonding characteristics of elements which may include cement which may be bonded to a pipe string. The method for determining the presence and bonding may comprise disposing an acoustic logging tool in a wellbore, wherein the acoustic logging tool comprises a transmitter and a receiver, broadcasting a pressure pulse with the transmitter into a first material, wherein the pressure pulse reflects off an interface of the first material and a pipe string as a reflected pressure pulse, recording the reflected pressure pulse with a receiver, and determining an integrity of a material using a Quintero Wellbore Index.

First claim

What is claimed is:

1. A method for determining an integrity of a material, comprising:
placing an acoustic logging tool in a wellbore, wherein the acoustic logging tool comprises:
a transmitter on the acoustic logging tool to broadcast a pressure pulse; and
a receiver on the acoustic logging tool to record a reflected pressure pulse;

broadcasting the pressure pulse with the transmitter into a first material, wherein the pressure pulse reflects off an interface of the first material and a pipe string as the reflected pressure pulse;
recording the reflected pressure pulse with a receiver; and
determining the integrity of the material using a Quintero Wellbore Index based at least in part on the reflected pressure pulse, wherein the Quintero Wellbore Index is a series of indices, wherein each index from the series of indices comprises one or more ray paths through a zone of interest, wherein an arrival time of a ray path from the one or more ray paths are subtracted by a theoretical arrival time, wherein the theoretical arrival time is an arrival time of a theoretical ray path traveling through a theoretical zone of interest, and wherein the theoretical zone of interest is 100% water or 100% fast solid cement.

2. The method of claim 1 , further comprising broadcasting a default pressure pulse from the transmitter to the receiver.

3. The method of claim 2 , wherein the time for the default pressure pulse to move between the transmitter and the receiver is determined by

tA
o

=

S

V

m
⁢
1

,

where tAo is the time, S is the distance between the transmitter and the receiver, and Vm1 is an acoustic compressional velocity.

4. The method of claim 1 , wherein the pressure pulse is a first ray, wherein the first ray bounces perpendicular to a pipe string.

5. The method of claim 4 , wherein a travel time for the first ray is determined by tA o =2√{square root over (r 1 1 +y 1 2 )}+(s−2y 1 )/V m1 , wherein tA 0 is the travel time, r 1 is a first radius, y is the first ray location on an x and y plane, S is a distance between the transmitter and the receiver, and V m1 is an acoustic compressional velocity.

6. The method of claim 1 , wherein a time of arrival of a C1 ray is determined by

tC
1

=

2

r
⁢
1

V

m
⁢
1

+

2

wcsg
⁢
1

V

csg
⁢
1

+

2

r
⁢
2

V

m
⁢
2

+

r
3
2

+

y
3
2

2

V

m
⁢
3

+

(

S
-

2
⁢

y
3

)

V

csg
⁢
2

,

wherein tC 1 is the time of arrival, r 1 is a first radius, y is the first ray location on an x and y plane, S is a distance between the transmitter and the receiver, V m1 is an acoustic compressional velocity of a first material, V m2 is an acoustic compressional velocity of a second material, V m3 is an acoustic compressional velocity of a third material, and the C1 ray is the ray path within a first zone of interest.

7. The method of claim 1 , wherein a general relation of the Quintero Wellbore Index for the zone of interest is determined by,

QWI
=

(

Arrival
⁢

time
⁢

of
⁢

appropriate
⁢

ray

-

Arrival
⁢

time
⁢

of
⁢

theoretical
⁢

ray
⁢

with

Assignees

• Halliburton Energy Services Inc

Inventors

• Quintero Luis F

Classifications

• E21B47/005 Primary

  Monitoring or checking of cementation quality or level · CPC title

• G01V1/46

  Data acquisition · CPC title

• G01V1/52

  Structural details · CPC title

• E21B47/14 Primary

  using acoustic waves · CPC title

• G01V1/48

  Processing data · CPC title