CA2160968A1 - Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements - Google Patents

Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements

Info

Publication number
CA2160968A1
CA2160968A1 CA002160968A CA2160968A CA2160968A1 CA 2160968 A1 CA2160968 A1 CA 2160968A1 CA 002160968 A CA002160968 A CA 002160968A CA 2160968 A CA2160968 A CA 2160968A CA 2160968 A1 CA2160968 A1 CA 2160968A1
Authority
CA
Canada
Prior art keywords
downhole
sensors
methods
depth correlation
invention include
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
CA002160968A
Other languages
French (fr)
Other versions
CA2160968C (en
Inventor
Harold Wallace Meyer, Jr.
Macmillan M. Wisler
Ronald J. Deady
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.)
Baker Hughes Holdings LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2160968A1 publication Critical patent/CA2160968A1/en
Application granted granted Critical
Publication of CA2160968C publication Critical patent/CA2160968C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction

Abstract

The current invention is directed toward the use of a downhole computer and downhole storage within a measurement-while-drilling (MWD) downhole subassembly to process data from the response of a plurality of sensors of different classes or one or more sensors of the same class which exhibit different measure points and vertical resolutions. Classes or types of sensors applicable to the invention include, but are not limited to, electromagnetic, acoustic, and nuclear. Sensor measurements are made essentially simultaneously. In combining downhole responses from one or more sensors to obtain parameters of interest, a critical prerequisite is downhole depth correlation and vertical resolution matching of all sensor responses prior to combination. Methods and apparatus are disclosed for performing these critical functions within the limits of telemetry and downhole storage capacities of current MWD systems, Alternate embodiments of the invention include wireline operations in which telemetry band width is limited by components such as single conductor logging cables employed in logging wells under high pressure.
CA002160968A 1994-10-20 1995-10-19 Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements Expired - Lifetime CA2160968C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/326,829 1994-10-20
US08/326,829 US5581024A (en) 1994-10-20 1994-10-20 Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements

Publications (2)

Publication Number Publication Date
CA2160968A1 true CA2160968A1 (en) 1996-04-21
CA2160968C CA2160968C (en) 2006-05-23

Family

ID=23273892

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002160968A Expired - Lifetime CA2160968C (en) 1994-10-20 1995-10-19 Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements

Country Status (4)

Country Link
US (1) US5581024A (en)
EP (1) EP0713104B1 (en)
CA (1) CA2160968C (en)
NO (1) NO316345B1 (en)

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Also Published As

Publication number Publication date
NO954176D0 (en) 1995-10-19
US5581024A (en) 1996-12-03
EP0713104B1 (en) 2002-08-28
NO954176L (en) 1996-04-22
EP0713104A3 (en) 1998-05-06
NO316345B1 (en) 2004-01-12
EP0713104A2 (en) 1996-05-22
CA2160968C (en) 2006-05-23

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