EP2877882A1 - Procédé pour l'inspection d'un matériel tubulaire souterrain - Google Patents

Procédé pour l'inspection d'un matériel tubulaire souterrain

Info

Publication number
EP2877882A1
EP2877882A1 EP13740472.9A EP13740472A EP2877882A1 EP 2877882 A1 EP2877882 A1 EP 2877882A1 EP 13740472 A EP13740472 A EP 13740472A EP 2877882 A1 EP2877882 A1 EP 2877882A1
Authority
EP
European Patent Office
Prior art keywords
radiation
tubular
energy
source
scattered
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.)
Withdrawn
Application number
EP13740472.9A
Other languages
German (de)
English (en)
Inventor
Donald K STEINMAN
Russel Hertzog
John Edward SMAARDYK
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.)
GE Oil and Gas Logging Services Inc
Original Assignee
GE Oil and Gas Logging Services 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
Priority claimed from US13/557,777 external-priority patent/US8878126B2/en
Application filed by GE Oil and Gas Logging Services Inc filed Critical GE Oil and Gas Logging Services Inc
Publication of EP2877882A1 publication Critical patent/EP2877882A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates generally to inspecting tubulars in a subterranean wellbore. More specifically, the present invention relates to a device and method that uses a radiation source for inspecting a subterranean tubular and a radiation detector for detecting or identifying the presence of an unwelcome or egregious substance or substances deposited in and/or adjacent the tubular.
  • a method of inspecting a tubular in a subterranean wellbore includes directing radiation from a radioactive source positioned in a logging tool into the adjacent sidewall of the tubular, detecting radiation scattered from a material in the annulus adjacent the tubular, estimating a rate and energy of the detected radiation, and identifying the substance based on the rate and energy of the detected radiation.
  • the radiation is a gamma ray and the source is a 137 Cs gamma ray source having energy of about 662 keV.
  • the Compton scattered radiation when detected has energy of from about 250 keV to about 650 keV.
  • the step of detection is performed using a detector axially offset from the source.
  • the emitted radiation can be directed in a substantially conical pattern from the source and wherein the energy of the detected radiation is dependent upon an angle of scatter of the radiation.
  • the substance may be asphaltene in the annulus and adhered to the tubular, scale deposited in the annulus adjacent the tubular, sand on the tubular, as well as combinations thereof.
  • the method can further include estimating a location of the substance, and help in removing the substance from the tubular based on the steps of identifying the substance and estimating the location of the substance.
  • the substance can be a production fluid inside or other deposits in the tubular, and where the tubular is production tubing.
  • a method of imaging a subterranean wellbore a logging instrument is provided that has a radiation source and a scattered radiation detector.
  • the method further includes introducing the logging instrument in a tubular that is inserted into the wellbore, directing radiation from the source so that some of the radiation scatters from materials adjacent the tubular to define scattered radiation, detecting the scattered radiation with a scattered radiation detector, and identifying the substance based on a rate and energy of the scattered radiation detected.
  • FIG. 1 a schematic of an example embodiment of a downhole imaging tool having a low energy radiation source and detectors disposed in a wellbore in accordance with the present invention.
  • FIG. 2 is a graph of an example of energy dependence of a single Compton-scattered 0.662 MeV Cesium- 137 gamma ray versus the scattering angle in accordance with the present invention.
  • FIG. 3 is a perspective view of one embodiment of the tool of FIG. 1.
  • FIGS. 4A and 4B are sectional views of an example embodiment of the tool of FIG. 3.
  • FIG. 5 is a graph of a single detector rate/logging response to an anomaly in a gravel- pack sand completion versus depth measured by an example embodiment of an imaging tool in accordance with the present invention.
  • FIG. 6 is a partial side sectional view of an example of an imaging tool in a tubular in accordance with an embodiment of the present invention.
  • FIG. 7 is an example of a spectrum of count intensity versus count energy in accordance with an embodiment of the present invention.
  • FIG. 8 is an example of a graph representing a high energy window (W6) count rate response to asphaltene deposits inside a production tubular in accordance with an embodiment of the present invention.
  • FIG. 9 is a schematic example of the imaging tool of FIG. 6 and a single scatter region of high energy radiation in accordance with an embodiment of the present invention.
  • a downhole imaging tool 100 is shown positioned in a "base- pipe” or inner steel housing 1 10 of a gravel pack.
  • a tool housing 130 may be constructed of any light metal wherein the term, "light metal,” as used herein, refers to any metal having an atomic number less than 23.
  • Downhole imaging tool 100 includes at a minimum a housing or pipe 130 carrying a radiation source 120 and plurality of detectors 140.
  • gamma radiation source 120 is centrally located in housing 130.
  • detectors 140 are symmetrically spaced apart azimuthally at a constant radius, but also positioned within housing 130. In other words, in one example, the radius on which detectors 140 are spaced apart is less than the radius of the housing 130.
  • Radiation source 120 emits radiation, in this case, gamma rays 124 into gravel pack 150.
  • the textured pattern of gravel pack 150 indicates possible regions of gravel pack that could be gravel-filled or not.
  • center region 151 may constitute a void in gravel pack 150 that has been filled with completion fluids or production fluids whereas other regions 153 may constitute portions of the gravel pack that are properly completed or fully sand filled.
  • regions 153 may constitute portions of the gravel pack that are properly completed or fully sand filled.
  • gamma rays 124 propagating into gravel pack 150 are Compton scattered (as at point 155), with a loss of some energy, back towards detectors 140 located within downhole imaging tool 100.
  • the lower-energy gamma rays 126 are detected by detectors 140.
  • the count-rate intensity of Compton scattered gamma rays 126 depends on, among other factors, the density of the gravel pack material. Hence, higher count rates represent higher density in the gravel pack, whereas lower count-rates represent lower density as a result of fewer gamma rays being back-scattered towards the detectors.
  • radiation source 120 includes barium, cesium, some other radiation source, or combinations thereof.
  • a source such as this, and because the detectors are located close to the source, detected energy originates only from a short distance into the gravel pack immediately adjacent a screen.
  • detectors 140 are positioned in housing 130 proximate to radiation source 120. In one example embodiment, radiation source 120 and detectors 140 are within about 3 to about 3.5 inches apart along the length of tool 100.
  • Shielding may be applied around radiation source 120 to collimate or otherwise limit the emission of radiation from radiation source 120 to a restricted longitudinal segment of gravel pack 150.
  • such shielding is a heavy metal shield, such as sintered-tungsten, which collimates the pathway for the emitted gamma rays into the gravel pack.
  • similar shielding may be used around each detector to limit the detector viewing aperture to only those gamma rays that are primarily singularly-scattered back to the detector from a specific azimuthal section of the gravel pack.
  • Techniques exist for converting radiation count rates from multiple detectors positioned axially around the logging tool into a complete 2D profile map of the gravel pack integrity include the SYSTATs Table Curve 3D method.
  • Other techniques include, but are not limited to, MATLAB, IMAGE, and advanced registration and techniques for making mosaic representations from data points can be used to map the base-pipe and gravel-pack environment.
  • 3D geostatistical-based software can be adapted to convert the basic gamma-ray count rates to generate a map of the gravel-pack environment. In this way, the integrity of a gravel pack or formation may be determined.
  • detector arrays may be positioned at differing distances from radiation source 220. Additionally, detector arrays on either side of radiation source 220 are also envisioned in certain embodiments. Electronics 260 may also be located in housing 230 or wherever convenient.
  • a radiation source 220 is centrally located in housing 230.
  • source 220 is positioned along the axis of housing 230.
  • Gamma-Ray collimator 225 may be- configured adjacent to the source 220 in order to directionally constrain radiation from the radiation source 220 to an azimuthal radiation segment of the gravel pack.
  • collimator 225 may include fins or walls 226 adjacent source 220 to direct gamma ray propagation. By directing, focusing, or otherwise orienting the radiation from radiation source 220, radiation may be guided to a more specific region of the gravel pack. It is appreciated that in certain embodiments, a heavy-met shutter mechanism could be further employed to direct radiation from radiation source 220. Additionally, the radiation energy may be selected, by choosing different isotopic sources, so as to provide some lithological or spatial depth discrimination.
  • collimator 225 constrains radiation from source 220.
  • collimator 225 is also conically shaped as at 228, in the direction of detectors 240 to collimate the gamma rays from source 220.
  • collimator 225 may be configured in any geometry suitable for directing, focusing, guiding, or otherwise orienting radiation from radiation source 220 to a more specific region of the gravel pack.
  • the radiation transmitted from source 220 into a gravel pack is Compton scattered back from the gravel pack to tool 200 where the back-scattered radiation may be measured by radiation detectors 240.
  • Radiation detectors 240 can be any plurality of sensors suitable for detecting radiation, including gamma ray detectors. In the illustrated embodiment, four detectors are depicted, although any number of detectors can be utilized. In another example embodiment, three detectors or six detectors are utilized; where optionally, each detector is disposed to "view" a different segment of the gravel pack.
  • the tool can image the entire circumference of the gravel pack in separately identifiable segments. The resolution of the image of the overall circumference can depend on the number of detectors, the energy of the gamma rays and the degree of shielding provided around each detector.
  • gamma ray detectors may include a scintillator crystal that emits light proportional to the energy deposited in the crystal by each gamma ray.
  • a photomultiplier tube may be coupled to the crystal to convert the light from the scintillation crystal to measurable electron current or voltage pulse, which is then used to quantify the energy of each detected gamma ray.
  • the gamma rays' energies are quantified, counted, and used to estimate the density of the gravel pack adjacent a screen.
  • Photomultiplier tubes may be replaced with high-temperature charge-coupled devices (CCD) or micro-channel photo- amplifiers.
  • Suitable scintillator crystals include, but are not limited to, Nal(Tl) crystals, BGO, and Lanthanum-bromide, or any combination thereof.
  • count-rates may be measured from returned radiation, in this case, returned gamma rays.
  • the intensity of the Compton scattered gamma rays depends on, among other factors, the density of the gravel pack material. Hence, lower density represents gaps in the gravel pack and lower count-rates represent lower density as a result of fewer gamma rays being back-scattered towards the detectors.
  • detectors 240 are mounted inside a housing at a radius smaller than the radius of housing 230 inset from the surface of housing 230. Likewise, while they need not be evenly spaced, in the illustrated embodiment, detectors 240 are evenly spaced on the selected radius. Although the illustrated example shows four detectors 240 spaced apart 90 degrees from one another, those skilled in the art will appreciate that any number of multiple detectors can be utilized in the invention. Further, while the embodiment illustrates all of the detectors 240 positioned at the same distance from source 220, they need not be evenly spaced. Thus, for example, one detector (or a multi-detector array) might be spaced apart 12 centimeters from the source, while another detector (or a detector array) is spaced apart 20 centimeters from the source or any other distance within the tool.
  • Each detector 240 may be mounted so as be shielded from the other detectors 240. While any type of shielding configuration may be utilized for the detectors 240, in the illustrated embodiment, collimator 248 is provided with a plurality of openings or slots 245 spaced apart around the perimeter of collimator 248. Although openings 245 could have any shape, such as round, oval, square or any other shape, in one example embodiment openings 245 are shaped as elongated slots and will be referred to as such herein.
  • a detector 240 is mounted in each slot 245, so as to encase detector 240 in the shield.
  • the width and depth of the slot 245 can be adjusted as desired to achieve the desired azimuthal range.
  • the length of slots 245 can be as long as the sensitive region of the gamma-ray detector (e.g. the crystal height). It will be appreciated that since a detector is disposed within the slot, the detector is not on the surface of the collimator where it might otherwise detect gamma rays from a larger azimuthal range.
  • slot 245 is 360/(number of detectors) degrees wide and the detector face to inner diameter of the pressure housing is a few millimeters deep (e.g. from about 2 to about 5 mm).
  • each slot is limited to 360/(number of detectors) degrees.
  • the view of each radiation detector 240 may be more focused on a particular region of the gravel pack.
  • shielding eliminates or at least mitigates radiation scattered from one detector to another detector.
  • source collimator 225 is shown as a single, integrally formed body, having fins 226, and conical surface 228, it need not be and could be formed of separate structural components, such as a source collimator combined with a detector collimator 248, so long as the shielding as described herein is achieved.
  • an anticoincidence algorithm may be implemented in electronics 260 to compensate for detector-to- detector radiation scattering. In this way, a processor can mitigate the effects of multiply- detected gamma rays via an anti-coincidence algorithm.
  • electronics 260, 262, and 264 are located above detectors 240 or below source 220.
  • Electronics 260 may include processor 262, memory 263, and power supply 264 for supplying power to gravel pack imaging tool 200.
  • Power supply 264 may be a battery or may receive power from an external source such as a wireline (not shown).
  • Processor 262 is adapted to receive measured data from radiation detectors 240. The measured data, which in certain embodiments includes count rates, may then be stored in memory 263 or further processed before being stored in memory 263.
  • Processor 262 may also control the gain of the photomultiplier or other device for converting scintillations into electrical pulses.
  • Electronics 260 may be located below source 220 and above detectors 240 or removed therefrom.
  • This tool may be deployed to measure the integrity of the gravel pack in new installations and to diagnose damage to the gravel pack from continuing production from the well.
  • a person of ordinary skill in the art with the benefit of this disclosure will appreciate how to relate the log results of count rates and inferred densities of gravel pack material to the structure of the pack and to reason from the results to the condition of the pack.
  • detector collimators 348 are fan-shaped in the X-Y plane and rectangular in the X-Z or Y-Z planes.
  • a conical source collimator 328 is desirable as it reduces multiple scattering events in the gravel pack.
  • Methods of using the present invention may include the use of different energy windows to map voids or blockages in the gravel pack in low to high density completion fluids.
  • at least four energy windows are used .
  • the Low Energy (LE or Wi) window typically from about 50 keV to about 200 keV
  • the Medium Energy (W 2 ) window typically from about 200 keV to about 250 keV
  • W 2 Medium Energy
  • a Broad Window typically may include gamma rays in the range of about 50 keV to about 250 keV.
  • a high energy window We also referred to herein as HE typically may include gamma rays in the range between about 250 keV to about 650 keV nearly the source energy.
  • the BW count rate has the highest statistical precision.
  • the LE and Medium Energy windows may be used for specific applications, such as deep-reading and maximum-dynamic-range imaging capabilities. Combinations of these different energy window logs can be combined using special methods (e.g. ad-hoc adaptive or Kalman-type processing algorithms) for enhanced precision and resolution. It is recognized that multiple- intensity energy sources may be utilized in the same tool, either simultaneously or sequentially.
  • Suitable angles of the source collimator include, but are not limited to, angles from about 15 degree to about 85 degree and from about 65 degree to about 85 degree in other embodiments.
  • suitable source to detector spacing include, but are not limited to, from about 1 inch to about 3.5 inches to about 8 inches, and in other embodiments, from about 6 inches to about 10 inches, and in still other embodiments to about 12 inches.
  • the downhole tool is capable of measuring count rates while being lowered or raised in the wellbore.
  • the downhole tool may perform measurements while the tool is stationary in the wellbore.
  • Exemplary raising and lowering rates include displacement rates of up to about 1800 feet/hour.
  • FIG. 5 shows a graph of a count rate versus depth in centimeters as measured by a 2.5 inch gravel -pack imaging tool in a 7 inch gravel pack. These logs were produced by processing individual detector gamma-ray count rates.
  • the plot in FIG. 5 is an MCNP-modeled example of the count-rate sensitivity to a 1-inch annulus wash-out in a gravel pack centered at a depth index of 4-centimeters. It shows significant sensitivity to changes in the gravel pack density.
  • MCNP refers to Monte Carlo N-Particle, developed by Los Alamos Monte Carlo Group and specifically titled "MCNP- A General Monte Carlo N-Particle Transport Code Version 5," Los Alamos National Laboratory Vols.
  • the source and the detectors are closely positioned to one another, such as about 3.5 inches apart. Because of this close physical relationship, energy propagated into the gravel pack and scattered back to the detector undergoes much less scatter, i.e., typically only a single scatter (back to the detector) as opposed to multiple scattering. In fact, the count rates increase with the density of the gravel pack utilizing the tool of the invention. This is significant because improved density resolution is realized as compared to prior art.
  • the prior art does not utilize a conically shaped collimator to direct the energy propagated into the gravel pack. Again, by utilizing such a collimator in the prior art tool, multiple scattering can be minimized and improve upon the imaging of the prior art tools.
  • FIG. 6 illustrates in a partial side sectional view, an example of an imaging tool 400 inserted within a tubular 402.
  • the tool 400 can be the same or substantially the same as the tools 100, 200 respectively of FIGS. 1 and 3 and described above.
  • the tubular 402 is inserted into a wellbore 404 that is shown intersecting a subterranean formation 406.
  • Casing 408 is optionally provided in the wellbore 404 for lining the sidewalls of the wellbore 404.
  • the tubular 402 is production tubing.
  • the tool 400 is deployed in the wellbore 404 on a line 410, where the line 410 can be a wireline, slickline, cable, or coil tubing.
  • the line 410 is shown inserted through a wellhead assembly 412 that is mounted on surface above an opening to the wellbore 404.
  • a radiation source 420 which can be substantially the same as sources 220, 320 respectively of Figures 2 and 4B and described above. Radiation emitted from the source 420 can travel along a path represented by arrows A, which initially diverges from the axis ⁇ . Some of the radiation undergoes scattering and is redirected to converge with the axis ⁇ at a location axial ly away from the source 420. As shown, the redirected radiation contacts sensor 422 where a count and associated energy of the radiation is detected. Examples exist wherein the sensor 422 includes detectors 140, 240 respectively of FIGS. 1 and 3 and discussed above.
  • the energy of the radiation detected by the sensor 422 is affected by the Compton scatter angle of the radiation (i.e. the angle of the directional change of the radiation).
  • the energy decreases with increasing angles of scatter, as shown in FIG. 2; thus the radiation flowing directly from the source 420 to the sensor 422 which undergoes only minimal scattering will have a greater detected energy than the radiation scattered from adjacent the tubular 402 and the formation 406, and the radiation scattered from adjacent the tubular 402 will have a greater detected energy than the radiation scattered from the formation 406.
  • Radiation counts detected by sensor 422 are binned based on an energy level of each count. As shown in the example of FIG.
  • the counts versus their corresponding energy are plotted to create a spectrum 424 to illustrate a distribution of detected energy of the radiation.
  • Energy windows Wi - W 6 are shown superimposed on the spectrum 424 that extend along the energy axis.
  • Counts of scattered radiation coming from the materials inside gravel pack, or materials between tubuiars, or inside tubuiars adjacent to the logging tool fall into windows Wi, W 2 , W3, or We.
  • Counts of radiation that flow un-scattered and directly from the source 420 to the sensor 422 (FIG. 6) fall into windows W 4 or W5 and can be used for tool gain stabilization.
  • the counts of radiation that scatter from material deposited on or adjacent the tubular 402 are illustrated as being in window W 6 .
  • FIG. 8 provides a plot 426 illustrating example MCNP modeled results for the High Energy window We count rate response dependence on the density-thickness product of an asphaltene deposit inside a 5 1 ⁇ 2-inch tubular 402 of Figure 6.
  • the We count rate increases with increasing asphaltene-thickness, as expected from single shallow- angle Compton scattering adjacent to the logging tool.
  • FIG. 9 illustrated is a side partial sectional view of a schematic example of the imaging tool 400 inserted within the tubular 402. Further shown is a region 428 that represents a zone where shallow-angle single scattered gamma rays are scattered from materials near the logging tool. Because shallow-angle Compton-scattered gamma rays lose very little of their initial energy, they fall into high energy window W6 of the plot 424 of FIG. 7.
  • the region 428 has an outer periphery with inner and outer lateral edges I, O that angle away from the axis ⁇ of the tool 400 and are joined at their distal ends by a distal edge D and a proximate edge P.
  • the region 428 extends from adjacent the tool 400 past an outer surface of the tubular 402. More specifically, an intersection of the inner and proximate edges I, P is adjacent an outer surface of the tool 400 and an intersection of the distal and outer edges D, O is outside of the tubular 402.
  • a Compton scattering equation can be used for generating the spatial locations that make up the region 428. Radiation scatter occurring in the region 428 has a relatively low angle compared with scatter that occurs radially past the region 428, as such, an energy level of radiation detected by the sensors 422 that is scattered from within the region 428, is greater than that of the energy level of shallow-angle radiation that scatters from areas radially past the region 428. In an example, the energy level of radiation scattered from within the region 428 and detected in W 6 by sensors 422 can range up to the source energy of about 662 keV.

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  • 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)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Measurement Of Radiation (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

La présente invention permet la détection et/ou l'identification de la présence de substances sur ou adjacentes à un matériel tubulaire disposé dans un trou de forage souterrain par le contrôle des rayons gamma diffusés depuis les substances. Les substances comprennent des dépôts sur une paroi latérale du matériel tubulaire et de liquide contenu dans le matériel tubulaire. Des exemples de dépôts comprennent des asphaltènes, des paraffines, le tartre, le sable, et analogues. Des rayons gamma sont dirigés stratégiquement depuis un outil disposé dans le matériel tubulaire et vers une partie adjacente de paroi latérale du matériel tubulaire. Certains des rayons gamma sont diffusés depuis les substances adjacentes au matériel tubulaire et sont détectés par des détecteurs réglés à une distance axiale désignée depuis la source de rayons gamma.
EP13740472.9A 2012-07-25 2013-07-15 Procédé pour l'inspection d'un matériel tubulaire souterrain Withdrawn EP2877882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/557,777 US8878126B2 (en) 2009-07-01 2012-07-25 Method for inspecting a subterranean tubular
PCT/US2013/050488 WO2014018292A1 (fr) 2012-07-25 2013-07-15 Procédé pour l'inspection d'un matériel tubulaire souterrain

Publications (1)

Publication Number Publication Date
EP2877882A1 true EP2877882A1 (fr) 2015-06-03

Family

ID=48874548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13740472.9A Withdrawn EP2877882A1 (fr) 2012-07-25 2013-07-15 Procédé pour l'inspection d'un matériel tubulaire souterrain

Country Status (5)

Country Link
EP (1) EP2877882A1 (fr)
CN (1) CN104823075B (fr)
BR (1) BR112015001561B1 (fr)
CA (1) CA2880070C (fr)
WO (1) WO2014018292A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2017000035A (es) 2014-07-11 2017-04-10 Halliburton Energy Services Inc Generacion de imagenes microenfocadas de defectos de tuberias de pozos.
DE112015006170T5 (de) * 2015-04-21 2017-11-02 Halliburton Energy Services, Inc. Formationsunabhängige Zementbewertung mit aktiver Gammastrahlenerkennung
JP6595379B2 (ja) * 2015-11-04 2019-10-23 富士電機株式会社 配管選別装置、配管選別方法及び配管測位システム

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US7726397B2 (en) * 2005-08-09 2010-06-01 Hexion Specialty Chemicals, Inc. Methods and compositions for determination of fracture geometry in subterranean formations
RU2327192C1 (ru) * 2006-09-11 2008-06-20 Schlumberger Technology B.V. Скважинный прибор для определения плотности пласта (варианты)
US8100177B2 (en) * 2008-02-20 2012-01-24 Carbo Ceramics, Inc. Method of logging a well using a thermal neutron absorbing material
BRPI0915717A2 (pt) * 2008-07-02 2015-10-27 Wood Group Logging Services Inc ferramenta de avaliação de cascalho e métodos de uso
US9267359B2 (en) * 2009-07-01 2016-02-23 Ge Oil & Gas Logging Services, Inc. Method and apparatus for interrogating a subterranean annulus

Non-Patent Citations (2)

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See also references of WO2014018292A1 *

Also Published As

Publication number Publication date
BR112015001561B1 (pt) 2022-02-15
BR112015001561A2 (pt) 2017-07-04
CN104823075B (zh) 2019-02-19
WO2014018292A1 (fr) 2014-01-30
CN104823075A (zh) 2015-08-05
CA2880070C (fr) 2020-04-14
CA2880070A1 (fr) 2014-01-30

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