GB1377931A - Method of analysis of the composition of a medium placed around a probe location - Google Patents

Method of analysis of the composition of a medium placed around a probe location

Info

Publication number
GB1377931A
GB1377931A GB21273A GB21273A GB1377931A GB 1377931 A GB1377931 A GB 1377931A GB 21273 A GB21273 A GB 21273A GB 21273 A GB21273 A GB 21273A GB 1377931 A GB1377931 A GB 1377931A
Authority
GB
United Kingdom
Prior art keywords
pulses
jan
switches
sequence
closed
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
GB21273A
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.)
RECH ET DACTIVITES PETROLIERES
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
RECH ET DACTIVITES PETROLIERES
Commissariat a lEnergie Atomique CEA
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
Priority claimed from FR7202095A external-priority patent/FR2168713A5/fr
Priority claimed from FR7202096A external-priority patent/FR2168238A1/en
Application filed by RECH ET DACTIVITES PETROLIERES, Commissariat a lEnergie Atomique CEA filed Critical RECH ET DACTIVITES PETROLIERES
Publication of GB1377931A publication Critical patent/GB1377931A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
    • 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
    • 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
    • G01V5/10—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 neutron sources
    • G01V5/101—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 neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole
    • G01V5/102—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 neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole the neutron source being of the pulsed type

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)
  • Nonlinear Science (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Radiation (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

1377931 Borehole logging COMMISSARIAT A L'ENERGIE ATOMIQUE and ENTREPRISE DE RECHERCHES ET D'ACTIVITES PETROLIERES (ELF) 2 Jan 1973 [21 Jan 1972(2)] 212/73 Heading G1A [Also in Division G4] A burst of pulses from back scattered radiation is prepared for amplitude analysis by routing the pulses into respective buffer stores and reading them out at a rate slow enough for the analyser to cope. In Fig. 2, each pulse is detected at 22 and switches P 1 -P 7 (which may be f.e.t.s.) closed in sequence to route the pulses, delayed at 6, to respective capacitors C 1 -C 7 . Switches P' 1 -P' 7 are then closed in sequence and the charges stored on C 1 -C 7 individually and successively integrated at 30 to avoid errors due to variations in the values of the storage capacitors C 1 -C 7 . The integrated signals are then converted at 102, Fig. 5, to pulse width signals which are timed by clock pulses from 103, counted at 106. The contents of counter 106 are read-out in parallel or series and transmitted to the analyzer. Source I may comprise a pulsed neutron generator and back scatter detector for borehole logging petroleum reservoirs.
GB21273A 1972-01-21 1973-01-02 Method of analysis of the composition of a medium placed around a probe location Expired GB1377931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7202095A FR2168713A5 (en) 1972-01-21 1972-01-21
FR7202096A FR2168238A1 (en) 1972-01-21 1972-01-21 Remote ambient analysis system - esp for borehole survey

Publications (1)

Publication Number Publication Date
GB1377931A true GB1377931A (en) 1974-12-18

Family

ID=26216854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21273A Expired GB1377931A (en) 1972-01-21 1973-01-02 Method of analysis of the composition of a medium placed around a probe location

Country Status (5)

Country Link
JP (1) JPS4883891A (en)
CA (1) CA999676A (en)
GB (1) GB1377931A (en)
IT (1) IT991537B (en)
OA (1) OA04312A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176958A (en) * 1985-06-19 1987-01-07 Forsogsanlaeg Riso Circuit arrangement for processing signals from a nuclear detector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63205572A (en) * 1987-02-20 1988-08-25 Fujitsu Ltd Error preventing circuit for voltage measurement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176958A (en) * 1985-06-19 1987-01-07 Forsogsanlaeg Riso Circuit arrangement for processing signals from a nuclear detector
US4767997A (en) * 1985-06-19 1988-08-30 Forsogsanlaeg Riso Circuit arrangement for processing signals from a nuclear detector

Also Published As

Publication number Publication date
DE2302017A1 (en) 1973-07-26
JPS4883891A (en) 1973-11-08
OA04312A (en) 1980-01-15
CA999676A (en) 1976-11-09
IT991537B (en) 1975-08-30
DE2302017B2 (en) 1975-06-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee