CA2573518A1 - Sonar sand detection - Google Patents

Sonar sand detection

Info

Publication number
CA2573518A1
CA2573518A1 CA002573518A CA2573518A CA2573518A1 CA 2573518 A1 CA2573518 A1 CA 2573518A1 CA 002573518 A CA002573518 A CA 002573518A CA 2573518 A CA2573518 A CA 2573518A CA 2573518 A1 CA2573518 A1 CA 2573518A1
Authority
CA
Canada
Prior art keywords
data set
fluid
particles
khz
acoustic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002573518A
Other languages
French (fr)
Other versions
CA2573518C (en
Inventor
Espen S. Johansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weatherford Technology Holdings LLC
Original Assignee
Weatherford Lamb Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Publication of CA2573518A1 publication Critical patent/CA2573518A1/en
Application granted granted Critical
Publication of CA2573518C publication Critical patent/CA2573518C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/107—Locating fluid leaks, intrusions or movements using acoustic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02408—Solids in gases, e.g. particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02416—Solids in liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02836—Flow rate, liquid level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02872—Pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/106—Number of transducers one or more transducer arrays

Abstract

Methods and apparatus for detecting particles flowing in a fluid within a conduit involve analysis of acoustic pressure signals detected with an array of at least two pressure sensors. The analysis can include monitoring for attenuation in power of the acoustic disturbances within the fluid and/or a reduction in a speed of sound in the fluid. This attenuation in power or reduction in the speed of sound can be detected to provide an output or otherwise indicate that particles are present in the fluid.

Claims (21)

1. A method of detecting particles in a fluid within a conduit, comprising:
measuring acoustic disturbances within the fluid with at least two pressure sensors in order to produce a pressure signal data set; and monitoring the data set to detect a change relative to a control set, wherein the change indicates that particles are present in the fluid and the change is at least one of a reduction in power of the acoustic disturbances within the fluid relative to the control set and a reduction in a speed of sound in the fluid relative to the control set.
2. The method of claim 1, wherein the change in the data set comprises the reduction in power of acoustic disturbances above 5 kHz.
3. The method of claim 1, wherein the change in the data set comprises the reduction in power of acoustic disturbances between 5 kHz and 20 kHz.
4. The method of claim 1, wherein the change in the data set comprises the reduction in power of acoustic disturbances that is greater than 5.0 decibels between 5 kHz and 20 kHz.
5. The method of claim 1, wherein the change comprises the reduction in power of the acoustic disturbances determined by a variation relative to the control set in a ratio of amplitude in acoustic waves traveling in a first direction to amplitude of acoustic waves traveling oppositely in a second direction.
6. The method of claim 1, wherein the fluid is flowing within the conduit while measuring the acoustic disturbances.
7. A system for detecting particles in a fluid within a conduit, comprising:
at least two sensors disposed along the conduit, the sensors for detecting acoustic disturbances within the fluid;

a processor for converting pressure signals from the at least two sensors into a data set indicative of power of the acoustic disturbances;
an analyzer for assessing the data set and determining whether the power of the acoustic disturbances is attenuated relative to a control set; and an output to indicate presence of particles in the fluid when the data set is attenuated relative to the control set.
8. The system of claim 7, wherein the analyzer compares the data set and the control set at frequencies above 5 kHz and the output is configured to indicate that particles are present when the data set is attenuated more than a preset value.
9. The system of claim 7, wherein the analyzer compares the data set and the control set at frequencies within a range of 5 kHz to 20 kHz and the output is configured to indicate that particles are present when the data set is attenuated more than 5.0 decibels.
10. The system of claim 7, wherein the sensors are optically based.
11. The system of claim 7, wherein the sensors comprise polyvinylidene fluoride.
12. The system of claim 7, wherein the control set is based on substantially no particles in the fluid.
13. The system of claim 7, wherein the control set is based on a known amount of particles in the fluid.
14. The system of claim 7, wherein the analyzer is configured to monitor the data set for a change in a ratio of amplitude in acoustic waves traveling in a first direction to amplitude of acoustic waves traveling oppositely in a second direction.
15. A method of detecting particles in a fluid within a conduit, comprising:

measuring acoustic disturbances within the fluid with at least two pressure sensors to produce pressure signals;
converting the pressure signals to provide a data set indicative of power of the acoustic disturbances;
assessing the data set and determining whether the power of the acoustic disturbances is attenuated relative to a control set; and determining if particles are in the fluid based on whether the data set is attenuated relative to the control set indicating that particles are present.
16. The method of claim 15, wherein the fluid is flowing within the conduit while measuring the acoustic disturbances.
17. The method of claim 15, wherein the fluid comprises a liquid with entrained gas.
18. The method of claim 15, wherein assessing the data set comprises comparing the data set and the control set at frequencies above 5 kHz to determine whether the data set is attenuated.
19. The method of claim 15, wherein assessing the data set comprises comparing the data set and the control set at frequencies within a range of 5 kHz to 20 kHz to determine whether the data set is attenuated.
20. The method of claim 15, wherein assessing the data set includes monitoring for a change in a ratio of amplitude in acoustic waves traveling in a first direction to amplitude of acoustic waves traveling oppositely in a second direction.
21. The method of claim 15, further comprising adjusting a production parameter of a well upon determining that particles are present in the fluid.
CA2573518A 2006-01-27 2007-01-10 Sonar sand detection Expired - Fee Related CA2573518C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/341,167 US7503217B2 (en) 2006-01-27 2006-01-27 Sonar sand detection
US11/341,167 2006-01-27

Publications (2)

Publication Number Publication Date
CA2573518A1 true CA2573518A1 (en) 2007-07-27
CA2573518C CA2573518C (en) 2012-05-08

Family

ID=37809801

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2573518A Expired - Fee Related CA2573518C (en) 2006-01-27 2007-01-10 Sonar sand detection

Country Status (3)

Country Link
US (1) US7503217B2 (en)
CA (1) CA2573518C (en)
GB (1) GB2434645B (en)

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CA2573518C (en) 2012-05-08
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