MX3468E - IMPROVEMENTS IN APPARATUS TO INVESTIGATE LAND FORMATIONS - Google Patents

IMPROVEMENTS IN APPARATUS TO INVESTIGATE LAND FORMATIONS

Info

Publication number
MX3468E
MX3468E MX100290U MX10029076U MX3468E MX 3468 E MX3468 E MX 3468E MX 100290 U MX100290 U MX 100290U MX 10029076 U MX10029076 U MX 10029076U MX 3468 E MX3468 E MX 3468E
Authority
MX
Mexico
Prior art keywords
neutron
pulse
gate
spectrum analyzer
formation
Prior art date
Application number
MX100290U
Other languages
Spanish (es)
Inventor
Stephen Antkiw
Richard D Murphy
Original Assignee
Schulmberger Surenco S A
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 US05/563,510 external-priority patent/US4031367A/en
Application filed by Schulmberger Surenco S A filed Critical Schulmberger Surenco S A
Publication of MX3468E publication Critical patent/MX3468E/en

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 nuclear radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of nuclear 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 nuclear 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 nuclear 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 nuclear 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

Abstract

La presente invención se refiere a mejoras en aparato para investigar formaciones terrestres atravesadas por un pozo de sondeo, que incluye: una herramienta de pozo adaptada para moverse a través del pozo de sondeo; una fuente de neutrones de impulso llevada por la herramienta del pozo para irradiar la formación terrestres con por lo menos un primer impulso de neutrones; un circuito de determinación para medir una característica neutrónica dependiente del tiempo seleccionado de la formación caracterizadas por: un detector que responde a los rayos gamma resultantes de las interacciones neutrónicas con núcleos de la formación relacionadas con el primer impulso de neutrones y para generar señales correspondientes representativas de las energías de los rayos gamma detectados; un analizador de espectro para analizar por lo menos una porción del espectro de energía de los rayos gamma, una compuerta entre el detector y el analizador de espectro par dejar pasar hacia el analizador de espectro aquellas señales genradas en respuesta a los rayos gamma detectado entre un primer período de tiempo siguiente al primer impulso de neutrones; y un controlador conectando a la compuerta para controlar el funcionamiento de la compuerta como una función de valor de la característica neutrónica seleccionada medida.The present invention relates to improvements in apparatus for investigating land formations traversed by a borehole, including: a well tool adapted to move through the borehole; a pulse neutron source carried by the well tool to irradiate the terrestrial formation with at least a first neutron pulse; a determination circuit to measure a selected time-dependent neutron characteristic of the formation characterized by: a detector that responds to gamma rays resulting from neutron interactions with formation nuclei related to the first neutron pulse and to generate representative corresponding signals of the detected gamma ray energies; a spectrum analyzer to analyze at least a portion of the gamma ray energy spectrum, a gate between the detector and the spectrum analyzer to allow those signals generated in response to the detected gamma rays to pass through the spectrum analyzer between a first time period following the first neutron pulse; and a controller connecting to the gate to control the operation of the gate as a function of measured selected neutron characteristic value.

MX100290U 1975-03-31 1976-03-30 IMPROVEMENTS IN APPARATUS TO INVESTIGATE LAND FORMATIONS MX3468E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56335975A 1975-03-31 1975-03-31
US05/563,510 US4031367A (en) 1975-03-31 1975-03-31 Methods and apparatus for pulse height analyzer offset control

Publications (1)

Publication Number Publication Date
MX3468E true MX3468E (en) 1980-12-09

Family

ID=27073260

Family Applications (1)

Application Number Title Priority Date Filing Date
MX100290U MX3468E (en) 1975-03-31 1976-03-30 IMPROVEMENTS IN APPARATUS TO INVESTIGATE LAND FORMATIONS

Country Status (12)

Country Link
JP (1) JPS51121401A (en)
AU (1) AU500341B2 (en)
BR (1) BR7601955A (en)
DE (1) DE2613259A1 (en)
EG (1) EG13061A (en)
FR (1) FR2308937A1 (en)
IT (1) IT1067520B (en)
MX (1) MX3468E (en)
NL (1) NL7603328A (en)
NO (1) NO144650C (en)
OA (1) OA05294A (en)
TR (1) TR19525A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485752A1 (en) * 1980-06-25 1981-12-31 Schlumberger Prospection METHOD AND DEVICE FOR MEASURING GAMMA RAYS IN A SURVEY

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264475A (en) * 1962-12-31 1966-08-02 Atlantic Refining Co Method for calibrating a radioactive logging system
US3534401A (en) * 1966-04-20 1970-10-13 Dresser Ind Computer for well logging system
US3566117A (en) * 1968-01-05 1971-02-23 Schlumberger Technology Corp Measuring technique
US3760281A (en) * 1970-10-27 1973-09-18 Coulter Electronics Axial trajectory sensor having gating means controlled by pulse duration measuring for electronic particle study apparatus
US3829686A (en) * 1971-09-20 1974-08-13 Texaco Inc Pulsed neutron logging system with gain compensation

Also Published As

Publication number Publication date
OA05294A (en) 1981-02-28
NO144650C (en) 1981-10-07
DE2613259C2 (en) 1989-06-22
IT1067520B (en) 1985-03-16
FR2308937B1 (en) 1979-04-06
TR19525A (en) 1979-06-27
FR2308937A1 (en) 1976-11-19
JPS62473B2 (en) 1987-01-08
JPS51121401A (en) 1976-10-23
DE2613259A1 (en) 1976-12-16
NO144650B (en) 1981-06-29
NO761005L (en) 1976-10-01
EG13061A (en) 1980-10-31
AU500341B2 (en) 1979-05-17
NL7603328A (en) 1976-10-04
AU1202976A (en) 1977-09-29
BR7601955A (en) 1976-10-05

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