CA2014875A1 - Logging method and apparatus for acoustic inspection of a borehole fitted with casing - Google Patents

Logging method and apparatus for acoustic inspection of a borehole fitted with casing

Info

Publication number
CA2014875A1
CA2014875A1 CA2014875A CA2014875A CA2014875A1 CA 2014875 A1 CA2014875 A1 CA 2014875A1 CA 2014875 A CA2014875 A CA 2014875A CA 2014875 A CA2014875 A CA 2014875A CA 2014875 A1 CA2014875 A1 CA 2014875A1
Authority
CA
Canada
Prior art keywords
casing
time window
resonance
signal
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
CA2014875A
Other languages
French (fr)
Other versions
CA2014875C (en
Inventor
Peter Wright
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.)
Schlumberger Canada Ltd
Original Assignee
Schlumberger Canada Ltd
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 Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Publication of CA2014875A1 publication Critical patent/CA2014875A1/en
Application granted granted Critical
Publication of CA2014875C publication Critical patent/CA2014875C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
    • G01V1/48—Processing data
    • G01V1/50—Analysing data
    • 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
    • E21B47/005—Monitoring or checking of cementation quality or 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects

Abstract

Method for determining at least one characteristic of a casing cemented in a borehole, such as cement bond and casing thickness, from a reflected acoustic signal S(t) obtained by directing an acoustic pulse at a substantially normal incidence towards a radial sector of the wall of the casing, said pulse stimulating thickness resonance within the walls of the casing. The method according to the invention comprises the steps of : defining a first time window corresponding to a first portion of signal S(t) including the initial reflection from the casing and subsequent acoustic returns due to resonance, defining a second time window corresponding to a second portion of signal S(t) only including the initial reflection from the casing, and determining said casing characteristic from information related to resonance contained in said first time window while normalizing said information by information contained within said second time window.
CA002014875A 1989-04-26 1990-04-19 Logging method and apparatus for acoustic inspection of a borehole fitted with casing Expired - Fee Related CA2014875C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905520A FR2646513B1 (en) 1989-04-26 1989-04-26 LOGGING METHOD AND DEVICE FOR THE ACOUSTIC INSPECTION OF A BORING WITH A TUBING
FR8905520 1989-04-26

Publications (2)

Publication Number Publication Date
CA2014875A1 true CA2014875A1 (en) 1990-10-26
CA2014875C CA2014875C (en) 1999-12-07

Family

ID=9381141

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002014875A Expired - Fee Related CA2014875C (en) 1989-04-26 1990-04-19 Logging method and apparatus for acoustic inspection of a borehole fitted with casing

Country Status (10)

Country Link
US (1) US5216638A (en)
EP (1) EP0395499B1 (en)
AT (1) ATE92193T1 (en)
AU (1) AU618472B2 (en)
CA (1) CA2014875C (en)
DE (1) DE69002375T2 (en)
DK (1) DK0395499T3 (en)
FR (1) FR2646513B1 (en)
ID (1) ID824B (en)
NO (1) NO176626C (en)

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Also Published As

Publication number Publication date
FR2646513B1 (en) 1991-09-20
NO901825D0 (en) 1990-04-25
EP0395499A3 (en) 1991-01-23
ID824B (en) 1996-07-24
AU618472B2 (en) 1991-12-19
NO901825L (en) 1990-10-29
CA2014875C (en) 1999-12-07
DE69002375D1 (en) 1993-09-02
EP0395499A2 (en) 1990-10-31
EP0395499B1 (en) 1993-07-28
DE69002375T2 (en) 1994-02-24
NO176626B (en) 1995-01-23
ATE92193T1 (en) 1993-08-15
AU5386990A (en) 1990-11-01
US5216638A (en) 1993-06-01
NO176626C (en) 1995-05-03
FR2646513A1 (en) 1990-11-02
DK0395499T3 (en) 1995-08-28

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