GB1282937A - Improvements in and relating to borehole logging techniqnes - Google Patents

Improvements in and relating to borehole logging techniqnes

Info

Publication number
GB1282937A
GB1282937A GB3904269A GB3904269A GB1282937A GB 1282937 A GB1282937 A GB 1282937A GB 3904269 A GB3904269 A GB 3904269A GB 3904269 A GB3904269 A GB 3904269A GB 1282937 A GB1282937 A GB 1282937A
Authority
GB
United Kingdom
Prior art keywords
kev
barium
borehole
soft
hard
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.)
Expired
Application number
GB3904269A
Inventor
Donald C Moore
Jay Tittmann
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 Inland Service Inc
Original Assignee
Schlumberger Inland Service 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 Schlumberger Inland Service Inc filed Critical Schlumberger Inland Service Inc
Priority to GB3904269A priority Critical patent/GB1282937A/en
Publication of GB1282937A publication Critical patent/GB1282937A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
    • G01V5/12—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma or X-ray sources

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1282937 Borehole investigation SCHLUMBERGER INLAND SERVICES Inc 5 Aug 1969 39042/69 Heading G1A In a gamma ray borehole investigating arrangement the detector output signals are segregated into at least a first group that corresponds to gamma ray energies in the vicinity of but extending downward from the K absorption limit for barium, and at least a second group that corresponds to a gamma ray energy range extending upwards from the barium K absorption limit, barium being an absorbing medium in the borehole mud. Additional segregation of hard and soft gamma rays is effected and the ratio of the two groups is used together, with the ratio of the hard and soft signals to determine the effects of the borehole barium. The source and detector housing is sprung into contact with the borehole wall and it includes a window of, for example, beryllium transparent to soft radiation, and having an effective atomic number of 11 or less. Ranges of 24 KeV to 33 KeV and 39 KeV to 51 KeV are given for the energies either side of the barium K limit and 39 KeV to 120 KeV and 240 KeV to 300 KeV are exemplified for soft and hard radiation. The determined figures are plotted by, for example, a galvanometer recorder to produce curves of formation chemical composition.
GB3904269A 1969-08-05 1969-08-05 Improvements in and relating to borehole logging techniqnes Expired GB1282937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3904269A GB1282937A (en) 1969-08-05 1969-08-05 Improvements in and relating to borehole logging techniqnes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3904269A GB1282937A (en) 1969-08-05 1969-08-05 Improvements in and relating to borehole logging techniqnes

Publications (1)

Publication Number Publication Date
GB1282937A true GB1282937A (en) 1972-07-26

Family

ID=10407274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3904269A Expired GB1282937A (en) 1969-08-05 1969-08-05 Improvements in and relating to borehole logging techniqnes

Country Status (1)

Country Link
GB (1) GB1282937A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579770A1 (en) * 1985-04-02 1986-10-03 Commissariat Energie Atomique SPECTROMETRIC GAMMA DIAGRAM SYSTEM FOR DETERMINING THE GEOLOGICAL PARAMETERS OF A ROCK
EP2751388A4 (en) * 2011-10-26 2015-04-29 Halliburton Energy Services Inc Methods and systems of formation density measurements in the presence of invasion of drilling fluids

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579770A1 (en) * 1985-04-02 1986-10-03 Commissariat Energie Atomique SPECTROMETRIC GAMMA DIAGRAM SYSTEM FOR DETERMINING THE GEOLOGICAL PARAMETERS OF A ROCK
US4769541A (en) * 1985-04-02 1988-09-06 Commissariat A L'energie Atomique Spectrometric gamma diagraphy system for the determination of the geological parameters of a rock
EP2751388A4 (en) * 2011-10-26 2015-04-29 Halliburton Energy Services Inc Methods and systems of formation density measurements in the presence of invasion of drilling fluids

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees