US20120326017A1 - Method of calculating formation characteristics - Google Patents
Method of calculating formation characteristics Download PDFInfo
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- US20120326017A1 US20120326017A1 US13/299,818 US201113299818A US2012326017A1 US 20120326017 A1 US20120326017 A1 US 20120326017A1 US 201113299818 A US201113299818 A US 201113299818A US 2012326017 A1 US2012326017 A1 US 2012326017A1
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005251 gamma ray Effects 0.000 claims description 31
- 238000005259 measurement Methods 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 229910052772 Samarium Inorganic materials 0.000 claims description 11
- 229910052793 cadmium Inorganic materials 0.000 claims description 11
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 11
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 6
- 238000005755 formation reaction Methods 0.000 description 41
- 230000006870 function Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000000084 gamma-ray spectrum Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 101000878457 Macrocallista nimbosa FMRFamide Proteins 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
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- 239000006028 limestone Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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Images
Classifications
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- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/09—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being neutrons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- 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
- G01V5/125—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 and detecting the secondary gamma- or X-rays in different places along the bore hole
Definitions
- Some devices are used to calculate characteristics of geological formations in drilling operations. Some devices include radiation emitters to emit radiation into the geological formation and detectors to detect the by-products of the interaction of the emitted radiation with a formation. For example, when the radiation emitter is a neutron emitter, and the emitted neutrons interact with nuclei in the geological formation, gamma rays are released, and detectors are used to measure the spectrum of released gamma rays to determine characteristics of the geological formation.
- the radiation emitter is a neutron emitter
- detectors are used to measure the spectrum of released gamma rays to determine characteristics of the geological formation.
- a method of calculating a formation characteristic includes measuring with at least two detectors spaced apart from each other, an intensity of gamma rays, and calculating the formation characteristic by calculating a ratio of the intensity of the gamma rays detected by the two detectors.
- a gamma ray measurement system includes a neutron source; a first detector; a second detector; and a computing device configured to receive from the first and second detectors detection signals corresponding to a detected gamma ray intensity of each of the first and second detectors, and configured to calculate a formation characteristic based on a ratio of a gamma ray intensity detected by the first detector to a gamma ray intensity detected by the second detector.
- a method of measuring a characteristic of an earth formation includes: covering at least two detectors with a layer of a boron isotope B10, cadmium or samarium; inserting the at least two detectors and a neutron source into a borehole; emitting neutrons from the neutron source; detecting gamma rays generated by a reaction of the B10 isotope, cadmium or samarium and neutrons; and calculating the characteristic of the formation by detecting a ratio of intensities of gamma rays detected by the at least two detectors.
- FIG. 1 illustrates an embodiment of an assembly configured to perform measurements of formation properties
- FIG. 2 is an exemplary spectrum of gamma rays detected by a detector of the assembly of FIG. 1 ;
- FIG. 3 illustrates a dependence of the ratio of the intensity of gamma rays with particular energy detected by a first detector and by a second detector of the assembly of FIG. 1 on formation porosity measured for formations with sandstone and limestone lithologies.
- FIG. 4 illustrates a gamma ray measurement system according to one embodiment
- FIG. 5 is a flow chart illustrating an embodiment of a method of detecting formation properties
- FIG. 6 illustrates an embodiment of a measurement unit configured to perform measurements of formation properties.
- FIG. 1 illustrates an assembly 20 configured to measure characteristics of an earth formation.
- the assembly 20 is configured to be inserted into a bore hole 11 in a geological formation 10 (e.g., via a borehole string, a drill string or a wireline) to gather data about the geological formation 10 , such as density, porosity, and composition.
- the formation detection assembly 20 is disposed in a shaft 21 and includes a measurement unit 22 .
- the assembly 20 may be embodied with any suitable carrier.
- a “carrier” as described herein means any device, device component, combination of devices, media and/or member that may be used to convey, house, support or otherwise facilitate the use of another device, device component, combination of devices, media and/or member.
- Exemplary non-limiting carriers include drill strings of the coiled tube type, of the jointed pipe type and any combination or portion thereof.
- Other carrier examples include casing pipes, wirelines, wireline sondes, slickline sondes, drop shots, downhole subs, bottom-hole assemblies, and drill strings.
- the measurement unit 22 of the assembly includes at least one neutron source 23 and a plurality of detectors, such as a short space (SS) detector 24 and a long space (LS) detector 25 .
- the neutron source 23 emits fast neutrons 40 , which interact with matter in the borehole and/or formation, lose energy, and become thermalized.
- the thermalized neutrons form a thermal neutron cloud 41 , and the characteristics of the thermal neutron cloud 41 , such as special distribution of thermal neutron flux, correlates with the properties of the matter that makes up the geological formation 10 such as hydrogen index and formation porosity.
- the neutron source 23 may be one of a chemical neutron source and a pulsed neutron generator.
- the thermal neutron flux passing the detectors is converted into detectable particles, e.g., gamma rays, which can be detected by the SS detector 24 and the LS detector 25 by the material 29 and 33 that converts thermals neutrons into gamma rays 29 and 33 .
- the material 29 and 33 converting neutrons into gamma rays 34 and 35 can be boron isotope B10.
- each of the SS detector 24 and the LS detector 25 are made of a piece of scintillation material and optically coupled photodetector.
- the SS detector 24 and the LS detector 25 include a respective crystal 26 and 30 , and a respective light sensor 27 and 31 .
- the crystals 26 and 30 are NaI crystals
- the light sensors 27 and 31 are photomultiplier tubes.
- other scintillation crystals such as LanBr 3 :Ce, YAP, GYSO or BGO are used to detect gamma rays emitted in the process of neutron interaction with material converting neutrons into gamma rays.
- the SS detector 24 is located closer to the neutron source 23 than the LS detector 25 .
- the neutron source 23 , the SS detector 24 , and the LS detector 25 are co-linear.
- the source and/or the detectors are laterally adjacent, as illustrated in FIG. 6 .
- a measurement unit 70 includes a first detector 71 and a second detector 72 laterally adjacent to each other.
- Each of the first detector 71 and the second detector 72 includes a layer of material 73 and 74 that reacts with neutrons to generate a gamma spectrum, such as a B10 isotope.
- the detectors 71 and 72 detect the gamma spectra, and the detected spectra are used to determine characteristics of a geological formation 10 .
- the measurement unit 70 may also include a neutron source 75 , to emit neutrons to generate a thermal neutron cloud, as discussed above with respect to FIG. 1 .
- each of the SS detector 24 and the LS detector 25 is coated with a layer 29 and 33 of material configured to convert neutrons into gamma rays, such as a B10 isotope.
- the B10 isotope coating 29 and 33 covers a first end 34 and 35 of the SS and LS detectors 24 and 25 facing the neutron source 23 .
- the B10 isotope coating 29 and 33 may also cover the sides of the SS and LS detectors 24 and 25 , including selected surfaces of the crystals and/or photodetectors. In the present embodiment, a second end 28 and 32 of the SS and LS detectors 24 and 25 facing away from the neutron source 23 is not covered by the B10 isotope coating 29 and 33 .
- Other materials converting neutrons into gamma rays can be used instead of the boron isotope B10, such as cadmium and samarium. In other embodiments the material converting neutrons into gamma rays can be deposited at the gamma ray detector surface in the form of axial or circumferential strips or can have any other shapes.
- Power P can be supplied to the assembly 20 performing measurement of the formation properties 20 via a wire to power the neutron source 23 , e.g., when the neutron source is a pulsed neutron generator, and may also provide operating power to the photodetectors 27 and 31 .
- Data D is transmitted to a computing device, such as a personal computer or server having a database to store and generate formation characteristic data based on the data collected by the SS detector 24 and the LS detector 25 .
- the computing device may include a processor and another suitable electronics, and may be disposed at any desired location, such as at surface location or a downhole location.
- the intensity of gamma rays produced by the neutron reaction with B10 nuclei is proportional to the intensity of the thermal neutron flux passing through the detectors 24 or 25 . Since the characteristics of the thermal neutron cloud 41 correspond to characteristics of the geological formation 10 , the intensity of gamma rays produced in neutron reaction with B10 nuclei provides information about the characteristics of the geological formation 10 . Since the boron peak in the measured spectrum includes the gamma ray signal generated in a neutron reaction with B10 nuclei, detecting and measuring the boron peak provides information about the thermal neutron cloud 41 and the geological formation 10 .
- the ratio of the intensity of gamma rays formed in neutron reaction with B10 nuclei in layer 29 of the SS detector 24 to the intensity of gamma rays formed in neutron reaction with B10 nuclei in layer 33 of the LS detector 25 corresponds to a porosity of the formation 10 , as demonstrated by formula (I).
- R is a ratio of gamma ray intensities
- GI xx is the gamma ray intensity emitted in neutron reaction with layers of B10 coatings 34 and 35 detected of a respective SS or LS detector 24 or 25
- FTN xx is a flux of thermal neutrons passing through the respective SS or LS detector 24 or 25
- n(Z x ) is the concentration of thermal neutrons in a point of detector location Z x
- f( ⁇ ) is a function of the formation porosity.
- FIG. 2 illustrates a gamma ray spectrum measured by a gamma ray detector with a B10 isotope coating exposed to the thermal neutrons.
- Line 51 includes lines 52 and 53 , as well as background radiation. Peak A corresponds to the combined peaks B and C. Detecting the characteristics of the peak B provides information about the thermal neutron cloud 41 and the geological formation 10 .
- the intensity of A peak was equal to the sum of intensities of peak B and peak C in the fit.
- FIG. 3 shows the dependence of a ratio of peak A intensities GI SS /GI LS extracted from the gamma ray spectra measured by the SS detector 24 and LS detector 25 of the assembly 20 in the case when assembly was equipped with pulsed neutron generator and was located in the sandstone and limestone formations of different porosity when pore space was filled with water.
- the apparent porosity has a correlated relationship with the calculated ratio of the gamma ray intensity detected by the SS and LS detectors 24 and 25 .
- the ratio of intensities of peak A i.e., GI SS /GI LS
- the apparent porosity also increases.
- the ratio of intensities of peak A i.e., GI SS /GI LS
- line 54 corresponds to limestone formations of different porosity and line 55 corresponds to sandstone formations of different porosities. Accordingly, the apparent porosity of each type of formation may be determined by calculating the ratio of the intensities of peak A in gamma ray spectra detected by the SS and LS detectors 24 and 25 .
- FIG. 4 illustrates an embodiment of a gamma ray measurement system 42 configured to operate the detection assembly 22 .
- the gamma ray measurement system 42 includes the measurement unit 22 , a computing device 43 , and a communication line 45 to transmit detected gamma ray data from the measurement unit 22 to the computing device 43 .
- the computing device 43 includes an input terminal 44 to receive the gamma ray data from the measurement unit 22 , and a processor, memory, and supporting logic to convert the detected data to information about a geological formation.
- the input terminal 44 is one of a wired port, such as a conductive lead connected to a wire, or a wireless port, such as an antenna.
- the communication line 45 is one of a wire and air through which wireless data signals propagate.
- the computing device 43 is configured to receive the detected gamma ray data and calculates formation characteristics, such as a porosity of the formation, based at least upon the portion of the gamma ray data corresponding to gamma rays generated when neutrons interact with the coating of the detectors 24 and 25 , as discussed above.
- FIG. 5 illustrates a method of calculating formation characteristics according to an embodiment of the present invention.
- the formation analysis assembly 20 is inserted into a bore hole.
- the neutron emitter 23 emits neutrons, and a neutron cloud 41 is generated around the neutron emitter 23 and the measurement unit 22 .
- the SS detector 24 and the LS detector 25 detect gamma rays generated when neutrons in the neutron cloud 41 react with a coating or layer (e.g., a B10 coating) on each of the SS detector 24 and the LS detector 25 .
- a coating or layer e.g., a B10 coating
- a ratio of gamma ray intensities formed in neutron reaction with B10 material and detected by the SS detector 24 and the LS detector 25 is calculated.
- a formation characteristic, such as porosity is calculated based on the calculated ratio of gamma ray intensities in operation 64 .
- FIG. 5 illustrates an embodiment in which each of operations 61 - 65 are performed, according to alternative embodiments one or more operations may be omitted, or additional operations may be performed.
- various analysis components may be used, including a digital and/or an analog system.
- the computing device and the detection assembly may have components such as a processor, storage media, memory, input, output, communications link, user interfaces, software programs, signal processors (digital or analog) and other such components (such as resistors, capacitors, inductors and others) to provide for operation and analyses of the apparatus and methods disclosed herein in any of several manners well appreciated in the art.
- teachings may be, but need not be, implemented in conjunction with a set of computer executable instructions stored on a computer readable medium, including memory (ROMs, RAMs), optical (CD-ROMs), or magnetic (disks, hard drives), or any other type that when executed causes a computer to implement the method of the present invention.
- ROMs, RAMs random access memory
- CD-ROMs compact disc-read only memory
- magnetic (disks, hard drives) any other type that when executed causes a computer to implement the method of the present invention.
- These instructions may provide for equipment operation, control, data collection and analysis and other functions deemed relevant by a system designer, owner, user or other such personnel, in addition to the functions described in this disclosure.
- a power supply e.g., at least one of a generator, a remote supply and a battery
- cooling unit heating unit
- motive force such as a translational force, propulsional force or a rotational force
- magnet electromagnet
- sensor electrode
- transmitter receiver
- transceiver antenna
- controller optical unit
- electrical unit or electromechanical unit may be included in support of the various aspects discussed herein or in support of other functions beyond this disclosure.
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US13/299,818 US20120326017A1 (en) | 2011-06-22 | 2011-11-18 | Method of calculating formation characteristics |
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US201161500039P | 2011-06-22 | 2011-06-22 | |
US13/299,818 US20120326017A1 (en) | 2011-06-22 | 2011-11-18 | Method of calculating formation characteristics |
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US13/299,818 Abandoned US20120326017A1 (en) | 2011-06-22 | 2011-11-18 | Method of calculating formation characteristics |
US13/527,000 Expired - Fee Related US8847170B2 (en) | 2011-06-22 | 2012-06-19 | Measurement of formation porosity using a single gamma ray detector |
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US13/527,000 Expired - Fee Related US8847170B2 (en) | 2011-06-22 | 2012-06-19 | Measurement of formation porosity using a single gamma ray detector |
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US (2) | US20120326017A1 (no) |
BR (2) | BR112013031083A2 (no) |
GB (2) | GB2506557A (no) |
NO (2) | NO344676B1 (no) |
WO (2) | WO2012177732A2 (no) |
Cited By (4)
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US20170108611A1 (en) * | 2014-07-07 | 2017-04-20 | Halliburton Energy Services, Inc. | Scale Identifier |
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Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200251A (en) * | 1961-07-07 | 1965-08-10 | Well Surveys Inc | Apparatus for neutron-neutron well logging |
US3219821A (en) * | 1959-06-15 | 1965-11-23 | Texaco Inc | Radioactivity well logging for detecting hydrogen and chlorine |
US3772513A (en) * | 1971-03-05 | 1973-11-13 | Texaco Inc | Radioactivity oil-water well logging utilizing neutron source |
US3792253A (en) * | 1970-09-24 | 1974-02-12 | Commw Scient Ind Res Org | Method and apparatus for detection of copper |
US4005290A (en) * | 1975-06-25 | 1977-01-25 | Mobil Oil Corporation | Neutron-neutron logging |
US4078174A (en) * | 1975-02-13 | 1978-03-07 | Schlumberger Technology Corporation | Neutron borehole logging correction technique |
US4379228A (en) * | 1980-10-10 | 1983-04-05 | Mobil Oil Corporation | Neutron-neutron-logging |
US4450354A (en) * | 1982-07-06 | 1984-05-22 | Halliburton Company | Gain stabilized natural gamma ray detection of casing thickness in a borehole |
US4558220A (en) * | 1981-10-02 | 1985-12-10 | Gearhart Industries, Inc. | Radioactivity well logging |
US4760252A (en) * | 1983-06-28 | 1988-07-26 | Schlumberger Technology Corporation | Well logging tool with an accelerator neutron source |
US5327773A (en) * | 1992-03-10 | 1994-07-12 | Japan National Oil Corporation | Method and apparatus for measuring steam density by neutron method |
US5525797A (en) * | 1994-10-21 | 1996-06-11 | Gas Research Institute | Formation density tool for use in cased and open holes |
US5536938A (en) * | 1995-02-22 | 1996-07-16 | Mobil Oil Corporation | Pulsed neutron decay logging |
US5627368A (en) * | 1995-07-05 | 1997-05-06 | Gas Research Institute | Four-detector formation-density tool for use in cased and open holes |
US5900627A (en) * | 1997-06-19 | 1999-05-04 | Computalog Research, Inc. | Formation density measurement utilizing pulse neutrons |
JP2001349951A (ja) * | 2000-06-07 | 2001-12-21 | ▲高▼野 直人 | 中性子検出装置 |
US20020014583A1 (en) * | 1999-01-04 | 2002-02-07 | Bothner Ronald E. | Dual compensated chlorine logging tool |
US6648083B2 (en) * | 2000-11-02 | 2003-11-18 | Schlumberger Technology Corporation | Method and apparatus for measuring mud and formation properties downhole |
US20040200274A1 (en) * | 2003-04-09 | 2004-10-14 | Halliburton Energy Services, Inc. | System and method having radiation intensity measurements with standoff correction |
US7129477B2 (en) * | 2002-04-03 | 2006-10-31 | Baker Hughes Incorporated | Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement |
US20060243898A1 (en) * | 2005-04-27 | 2006-11-02 | Baker Hughes Incorporated | Method and apparatus for an improved formation density indicator using pulsed neutron instruments |
US20070023626A1 (en) * | 2005-07-26 | 2007-02-01 | Baker Hughes Incorporated | Measurement of water-oil saturation using pulsed neutron instrumentation |
US7511266B1 (en) * | 2006-12-06 | 2009-03-31 | Bothner Ronald E | Irradiated formation tool (IFT) apparatus and method |
US20090205825A1 (en) * | 2008-02-20 | 2009-08-20 | Carbo Ceramics Inc. | Method of logging a well using a thermal neutron absorbing material |
US20110156357A1 (en) * | 2009-12-28 | 2011-06-30 | Nissin Kogyo Co., Ltd. | Dynamic seal member |
US20110198489A1 (en) * | 2010-02-01 | 2011-08-18 | Baker Hughes Incorporated | Lithology pair ratio: a ratio-based lithology indicator using pair production |
US20110284755A1 (en) * | 2009-01-30 | 2011-11-24 | Alliance For Sustainable Energy, Llc | High sensitivity, solid state neutron detector |
US20110284731A1 (en) * | 2010-05-19 | 2011-11-24 | Schlumberger Technology Corporation | Gamma-ray detectors for downhole applications |
US20130206972A1 (en) * | 2010-06-30 | 2013-08-15 | Schlumberger Technology Corporation | Neutron detection based on a boron shielded gamma detector |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3413470A (en) | 1965-06-18 | 1968-11-26 | Mobil Oil Corp | Epithermal neutron and gamma ray detector |
US4092536A (en) * | 1976-05-27 | 1978-05-30 | Texaco Inc. | Method for detecting cement voids or borehole washouts |
US4122339A (en) | 1977-04-20 | 1978-10-24 | Texaco Inc. | Earth formation pulsed neutron porosity logging system utilizing epithermal neutron and inelastic scattering gamma ray detectors |
US4137450A (en) * | 1977-06-13 | 1979-01-30 | Dresser Industries, Inc. | Dual detector pulsed neutron logging for providing indication of formation porosity |
US4604522A (en) * | 1984-11-05 | 1986-08-05 | Halliburton Company | Method and apparatus for logging a borehole employing dual radiation detectors |
US6373066B1 (en) | 1999-08-20 | 2002-04-16 | Saint-Gobain Industrial Ceramics, Inc. | Thermal neutron detector using a scintillator with background gamma ray shielding |
US7282704B2 (en) | 2004-05-28 | 2007-10-16 | Baker Hughes Incorporated | Method for determining formation porosity and gas saturation in a gas reservoir |
US7365307B2 (en) | 2005-02-28 | 2008-04-29 | Schlumberger Technology Corporation | Sigma/porosity tools with neutron monitors |
EP1795921B1 (en) | 2005-12-06 | 2013-01-23 | Services Petroliers Schlumberger | Determination of porosity and fluid saturation of underground formations |
US7615741B2 (en) | 2006-06-29 | 2009-11-10 | Baker Hughes Incorporated | Determining organic carbon downhole from nuclear spectroscopy |
US7548817B2 (en) | 2006-09-28 | 2009-06-16 | Baker Hughes Incorporated | Formation evaluation using estimated borehole tool position |
US7772545B2 (en) | 2008-07-24 | 2010-08-10 | Halliburton Energy Services, Inc. | Nuclear logging tool |
US8510051B2 (en) * | 2008-09-30 | 2013-08-13 | Halliburton Energy Services, Inc. | Systems and methods for evaluating formations having unknown or mixed salinity |
-
2011
- 2011-11-18 US US13/299,818 patent/US20120326017A1/en not_active Abandoned
-
2012
- 2012-06-19 US US13/527,000 patent/US8847170B2/en not_active Expired - Fee Related
- 2012-06-20 WO PCT/US2012/043301 patent/WO2012177732A2/en active Application Filing
- 2012-06-20 GB GB1400544.1A patent/GB2506557A/en not_active Withdrawn
- 2012-06-20 BR BR112013031083A patent/BR112013031083A2/pt active Search and Examination
- 2012-06-20 GB GB1400491.5A patent/GB2506320B/en not_active Expired - Fee Related
- 2012-06-20 BR BR112013032487A patent/BR112013032487A2/pt not_active IP Right Cessation
- 2012-06-20 WO PCT/US2012/043222 patent/WO2012177682A2/en active Application Filing
-
2013
- 2013-11-07 NO NO20131485A patent/NO344676B1/no not_active IP Right Cessation
- 2013-11-12 NO NO20131501A patent/NO20131501A1/no not_active Application Discontinuation
Patent Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3219821A (en) * | 1959-06-15 | 1965-11-23 | Texaco Inc | Radioactivity well logging for detecting hydrogen and chlorine |
US3200251A (en) * | 1961-07-07 | 1965-08-10 | Well Surveys Inc | Apparatus for neutron-neutron well logging |
US3792253A (en) * | 1970-09-24 | 1974-02-12 | Commw Scient Ind Res Org | Method and apparatus for detection of copper |
US3772513A (en) * | 1971-03-05 | 1973-11-13 | Texaco Inc | Radioactivity oil-water well logging utilizing neutron source |
US4078174A (en) * | 1975-02-13 | 1978-03-07 | Schlumberger Technology Corporation | Neutron borehole logging correction technique |
US4005290A (en) * | 1975-06-25 | 1977-01-25 | Mobil Oil Corporation | Neutron-neutron logging |
US4379228A (en) * | 1980-10-10 | 1983-04-05 | Mobil Oil Corporation | Neutron-neutron-logging |
US4558220A (en) * | 1981-10-02 | 1985-12-10 | Gearhart Industries, Inc. | Radioactivity well logging |
US4450354A (en) * | 1982-07-06 | 1984-05-22 | Halliburton Company | Gain stabilized natural gamma ray detection of casing thickness in a borehole |
US4760252A (en) * | 1983-06-28 | 1988-07-26 | Schlumberger Technology Corporation | Well logging tool with an accelerator neutron source |
US5327773A (en) * | 1992-03-10 | 1994-07-12 | Japan National Oil Corporation | Method and apparatus for measuring steam density by neutron method |
US5525797A (en) * | 1994-10-21 | 1996-06-11 | Gas Research Institute | Formation density tool for use in cased and open holes |
US5536938A (en) * | 1995-02-22 | 1996-07-16 | Mobil Oil Corporation | Pulsed neutron decay logging |
US5627368A (en) * | 1995-07-05 | 1997-05-06 | Gas Research Institute | Four-detector formation-density tool for use in cased and open holes |
US5900627A (en) * | 1997-06-19 | 1999-05-04 | Computalog Research, Inc. | Formation density measurement utilizing pulse neutrons |
US20020014583A1 (en) * | 1999-01-04 | 2002-02-07 | Bothner Ronald E. | Dual compensated chlorine logging tool |
JP2001349951A (ja) * | 2000-06-07 | 2001-12-21 | ▲高▼野 直人 | 中性子検出装置 |
US6648083B2 (en) * | 2000-11-02 | 2003-11-18 | Schlumberger Technology Corporation | Method and apparatus for measuring mud and formation properties downhole |
US7129477B2 (en) * | 2002-04-03 | 2006-10-31 | Baker Hughes Incorporated | Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement |
US20040200274A1 (en) * | 2003-04-09 | 2004-10-14 | Halliburton Energy Services, Inc. | System and method having radiation intensity measurements with standoff correction |
US20060243898A1 (en) * | 2005-04-27 | 2006-11-02 | Baker Hughes Incorporated | Method and apparatus for an improved formation density indicator using pulsed neutron instruments |
US20070023626A1 (en) * | 2005-07-26 | 2007-02-01 | Baker Hughes Incorporated | Measurement of water-oil saturation using pulsed neutron instrumentation |
US7511266B1 (en) * | 2006-12-06 | 2009-03-31 | Bothner Ronald E | Irradiated formation tool (IFT) apparatus and method |
US20090205825A1 (en) * | 2008-02-20 | 2009-08-20 | Carbo Ceramics Inc. | Method of logging a well using a thermal neutron absorbing material |
US20110284755A1 (en) * | 2009-01-30 | 2011-11-24 | Alliance For Sustainable Energy, Llc | High sensitivity, solid state neutron detector |
US20110156357A1 (en) * | 2009-12-28 | 2011-06-30 | Nissin Kogyo Co., Ltd. | Dynamic seal member |
US20110198489A1 (en) * | 2010-02-01 | 2011-08-18 | Baker Hughes Incorporated | Lithology pair ratio: a ratio-based lithology indicator using pair production |
US20110284731A1 (en) * | 2010-05-19 | 2011-11-24 | Schlumberger Technology Corporation | Gamma-ray detectors for downhole applications |
US20130206972A1 (en) * | 2010-06-30 | 2013-08-15 | Schlumberger Technology Corporation | Neutron detection based on a boron shielded gamma detector |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015050661A1 (en) * | 2013-10-01 | 2015-04-09 | Baker Hughes Incorporated | Downhole cement evalution using pulsed neutron measurements |
US9885802B2 (en) | 2013-10-01 | 2018-02-06 | Baker Hughes, A Ge Company, Llc | Downhole cement evalution using pulsed neutron measurements |
US20150168590A1 (en) * | 2013-12-16 | 2015-06-18 | Schlumberger Technology Corporation | Neutron generator having multiple extractors with independently selectable potentials |
US9472370B2 (en) * | 2013-12-16 | 2016-10-18 | Schlumberger Technology Corporation | Neutron generator having multiple extractors with independently selectable potentials |
US20170108611A1 (en) * | 2014-07-07 | 2017-04-20 | Halliburton Energy Services, Inc. | Scale Identifier |
US10114144B2 (en) * | 2014-07-07 | 2018-10-30 | Halliburton Energy Services, Inc. | Scale identifier |
US20230003114A1 (en) * | 2021-07-01 | 2023-01-05 | Saudi Arabian Oil Company | Method and system for predicting caliper log data for descaled wells |
US11753926B2 (en) * | 2021-07-01 | 2023-09-12 | Saudi Arabian Oil Company | Method and system for predicting caliper log data for descaled wells |
Also Published As
Publication number | Publication date |
---|---|
BR112013031083A2 (pt) | 2016-11-29 |
WO2012177682A3 (en) | 2013-03-14 |
GB201400491D0 (en) | 2014-02-26 |
NO20131485A1 (no) | 2013-11-15 |
GB2506557A (en) | 2014-04-02 |
NO20131501A1 (no) | 2013-11-12 |
US8847170B2 (en) | 2014-09-30 |
WO2012177682A2 (en) | 2012-12-27 |
GB2506320B (en) | 2017-03-15 |
BR112013032487A2 (pt) | 2017-02-21 |
NO344676B1 (no) | 2020-03-02 |
GB201400544D0 (en) | 2014-03-05 |
WO2012177732A3 (en) | 2013-03-14 |
WO2012177732A2 (en) | 2012-12-27 |
GB2506320A (en) | 2014-03-26 |
US20120326048A1 (en) | 2012-12-27 |
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