GB1505446A - Behind casing water flow detection - Google Patents

Behind casing water flow detection

Info

Publication number
GB1505446A
GB1505446A GB38143/76A GB3814376A GB1505446A GB 1505446 A GB1505446 A GB 1505446A GB 38143/76 A GB38143/76 A GB 38143/76A GB 3814376 A GB3814376 A GB 3814376A GB 1505446 A GB1505446 A GB 1505446A
Authority
GB
United Kingdom
Prior art keywords
source
detectors
water flow
counts
ratio
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
GB38143/76A
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.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
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 US05/628,169 external-priority patent/US4032778A/en
Priority claimed from US05/628,172 external-priority patent/US4028546A/en
Priority claimed from US05/628,174 external-priority patent/US4032780A/en
Application filed by Texaco Development Corp filed Critical Texaco Development Corp
Publication of GB1505446A publication Critical patent/GB1505446A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
    • G01F1/64—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by measuring electrical currents passing through the fluid flow; measuring electrical potential generated by the fluid flow, e.g. by electrochemical, contact or friction effects
    • 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
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
    • 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
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
    • E21B47/111—Locating fluid leaks, intrusions or movements using tracers; using radioactivity using radioactivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/7042—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter using radioactive tracers
    • 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

Abstract

1505446 Measuring flow-rate of water in borehole casing TEXACO DEVELOPMENT CORP 15 Sept 1976 [3 Nov 1975(3)] 38143/76 Heading G1A The volume flow-rate of undesired water flow behind the casing 102 of a borehole e.g. along a cement lining channel 110, is measured by the use of neutron activation analysis apparatus comprising a fast neutron source 126 and longitudinally spaced detectors D 1 , D 2 , the source causing activation of oxygen nuclei to form unstable nitrogen N<SP>16</SP>, the gamma radiation decay from which is detected. The Specification provides an expression relating the ratio of the counts from the two detectors with the linear velocity v of the water flow. Using v, the volume flow V may be calculated from a further expression relating V to (among other known quantities) the count rate for a particular detector, the velocity v, the spacing S between the source and the particular detector, and the distance R from the particular detector to the centre of the water flow if R can be provided estimation or measurement. The value of R may be measured by two methods. In the first, pulse height analysis techniques are used to compare the counts in two gamma energy ranges, the ratio obtained being correlated with a calibration curve, Figs. 5 and 6 (not shown). In the second a specialized detector construction is used, Fig. 7. A central scintillator crystal 71 and an outer cylindrical crystal 72 (NaI or CsI-thallium activated) are respectively coupled to photo-multipliers and the ratio of the counts correlated with a calibration curve to find R, Fig. 8 (not shown). The activation analysis tool may be operated with a continuous source or preferably using a pulsed source. Different counting windows are used in each case, Figs. 4 and 5 (not shown). Typically, a Deuterium-tritium type accelerator is used to produce 14 MeV neutrons in bursts of 1 ms. The detectors are gated off for the initial period so that prompt gammas are not detected, then gated on for 6 ms. before the next accelerator pulse Fig. 11 (not shown). Synchronization pulses aid data handling as does the use of opposite polarity pulses from the individual detectors. A computer evaluates the value V at different heights sensed at 112. Measurements are taken with the logging tool fixed or slow moving. The tool is constructed in module form so that the source may be attached below the detectors for measurements in upward flowing water and vice versa, Figs. 9A-9C (not shown).
GB38143/76A 1975-11-03 1976-09-15 Behind casing water flow detection Expired GB1505446A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/628,169 US4032778A (en) 1975-11-03 1975-11-03 Behind casing water volume flow rate measurement using gamma ray spectral degradation
US05/628,172 US4028546A (en) 1975-11-03 1975-11-03 Behind well casing water flow detection system
US05/628,174 US4032780A (en) 1975-11-03 1975-11-03 Behind casing water flow detection using continuous oxygen activation

Publications (1)

Publication Number Publication Date
GB1505446A true GB1505446A (en) 1978-03-30

Family

ID=27417441

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38143/76A Expired GB1505446A (en) 1975-11-03 1976-09-15 Behind casing water flow detection

Country Status (8)

Country Link
AU (1) AU502652B2 (en)
BR (1) BR7607281A (en)
FR (1) FR2329978A1 (en)
GB (1) GB1505446A (en)
NO (1) NO145743C (en)
NZ (1) NZ182256A (en)
RO (1) RO76913A (en)
YU (1) YU268976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042796A (en) * 2018-10-12 2020-04-21 中国石油化工股份有限公司 Oil well through-ring air separation laminar flow measuring device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115576A (en) * 1959-07-31 1963-12-24 Jersey Prod Res Co Method of controlling well fluid circulation by radioactivation of fluid elements
US3084250A (en) * 1959-11-24 1963-04-02 Res & Aviat Dev Inc Material flow detector and method
US3789217A (en) * 1970-02-10 1974-01-29 Dresser Ind Water production system having means to selectively profile vary borehole fluid flow
US3733486A (en) * 1970-12-30 1973-05-15 Texaco Inc Radiological well logging methods and apparatus for reducing the effect of activation from the detector crystal
US3815677A (en) * 1972-03-03 1974-06-11 Exxon Production Research Co Method for operating in wells
FR2251014A1 (en) * 1973-11-08 1975-06-06 Texaco Development Corp Radioactive well logging - with comparison of neutron capture and aluminium isotope decay radiations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042796A (en) * 2018-10-12 2020-04-21 中国石油化工股份有限公司 Oil well through-ring air separation laminar flow measuring device
CN111042796B (en) * 2018-10-12 2023-07-11 中国石油化工股份有限公司 Oil well annular space passing layered flow measuring device

Also Published As

Publication number Publication date
NO763530L (en) 1977-05-04
AU502652B2 (en) 1979-08-02
NZ182256A (en) 1980-11-28
NO145743C (en) 1982-05-26
BR7607281A (en) 1977-09-13
NO145743B (en) 1982-02-08
YU268976A (en) 1982-10-31
FR2329978B1 (en) 1983-11-18
FR2329978A1 (en) 1977-05-27
RO76913A (en) 1982-02-01
AU1919676A (en) 1978-05-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940915