WO2013188092A1 - Élastographie pour inspecter l'intégrité du ciment dans un puits de forage - Google Patents

Élastographie pour inspecter l'intégrité du ciment dans un puits de forage Download PDF

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Publication number
WO2013188092A1
WO2013188092A1 PCT/US2013/042844 US2013042844W WO2013188092A1 WO 2013188092 A1 WO2013188092 A1 WO 2013188092A1 US 2013042844 W US2013042844 W US 2013042844W WO 2013188092 A1 WO2013188092 A1 WO 2013188092A1
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WO
WIPO (PCT)
Prior art keywords
cement
wellbore
displacement
tensor map
channels
Prior art date
Application number
PCT/US2013/042844
Other languages
English (en)
Inventor
Stephen R. BARNES
Thomas O'donnell
Original Assignee
Siemens Corporation
Siemens Medical Solutions Usa, 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 US13/871,346 external-priority patent/US20140321240A1/en
Application filed by Siemens Corporation, Siemens Medical Solutions Usa, Inc. filed Critical Siemens Corporation
Publication of WO2013188092A1 publication Critical patent/WO2013188092A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/043—Analysing solids in the interior, e.g. by shear waves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/005—Monitoring or checking of cementation quality or level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • G01N29/0654—Imaging
    • G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
    • G01N29/4436—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison with a reference signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0055—Generation of the force using mechanical waves, e.g. acoustic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0232—Glass, ceramics, concrete or stone
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/025—Change of phase or condition
    • G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02827—Elastic parameters, strength or force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging

Definitions

  • the present disclosure relates to elastography and, more specifically, to elastography for cement integrity inspection.
  • Cement is widely used in deep water oil drilling as a means of containing pressure in a wellbore after it is drilled and prior to harvesting hydrocarbons. Cement is also used to fill the annular space between the borehole and the casing placed therein. Cement is also used, at times, as a well plug. Under the conditions associated with such drilling, proper wellbore cement integrity may be vital to prevent disaster. If channels form within the wellbore cement, communication between different formations may be possible and these communications may lead to a potentially catastrophic blow out.
  • interfaces between cement and the borehole and casing are part of the barrier system and may be a pathway for potential leakage.
  • a method for examining integrity of cement in a wellbore includes deploying an ultrasound transducer within a wellbore.
  • a pushing pulse is emitted from the ultrasound transducer to elicit a displacement of the cement within the wellbore.
  • a sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse.
  • a strain tensor map is generated from the acquired sequence of ultrasound images.
  • a degree of integrity of the cement is determined within the wellbore based on the generated strain tensor map.
  • the pushing pulse emitted from the ultrasound transducer may elicit a displacement of the cement within a range of about ten to about one hundred microns, depending on the ultrasonic frequency used and the pushing pulse energy.
  • the ultrasound transducer used to emit the pushing pulse may also be used to acquire the sequence of ultrasound images to estimate the displacement response to the pushing pulse.
  • Determining the degree of integrity of the cement within the wellbore based on the generated strain tensor map may include identifying one or more subregions within the cement based on disparities within the stain tensor map, characterizing each subregion within the cement based on values of the strain tensor map for each subregion and known strain tensors for various materials including cement, fluid and gas, and determining if there is one or more channels present within the cement based on the characterizations of the subregions.
  • remedial actions are performed to improve the integrity of the cement.
  • the remedial action may include agitating the cement within the wellbore before the cement hardens. Agitation may include application of a focused acoustic beam.
  • the focused acoustic beam may cause liquefaction within the cement.
  • a method for deploying cement in a wellbore includes pumping cement into a wellbore.
  • An ultrasound transducer is deployed into the wellbore.
  • a pushing pulse is emitted from the ultrasound transducer to elicit a displacement of the cement within the wellbore.
  • a sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse.
  • a strain tensor map is generated from the acquired sequence of ultrasound images.
  • the presence of channels within the cement within the wellbore is detected based on the generated strain tensor map.
  • the cement within the wellbore is agitated to reduce the channels when it is determined that channels are present within the cement.
  • Additional cement may be pumped into the wellbore after the cement already pumped into the wellbore has been sufficiently agitated to reduce the channels.
  • the pushing pulse emitted from the ultrasound transducer may elicit a displacement of the cement within a range of about ten to about one hundred microns depending on the ultrasonic frequency used and the pushing pulse energy.
  • the ultrasound transducer used to emit the pushing pulse may also be used to acquire the sequence of ultrasound images to estimate the displacement response to the pushing pulse.
  • Detecting the presence of channels within the cement within the wellbore based on the generated strain tensor map may include identifying one or more subregions within the cement based on disparities within the stain tensor map, characterizing each subregion within the cement based on values of the strain tensor map for each subregion and known strain tensors for various materials including cement, fluid and gas, and determining if there is one or more channels present within the cement based on the characterizations of the subregions.
  • a computer system includes a processor and a non-transitory, tangible, program storage medium, readable by the computer system, embodying a program of instructions executable by the processor to perform method steps for examining integrity of cement in a wellbore.
  • the method includes controlling a deployment of an ultrasound transducer within a wellbore. An emission of a pushing pulse from the ultrasound transducer is controlled to elicit a displacement of the cement within the wellbore. A sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse. A strain tensor map is generated from the acquired sequence of ultrasound images. A degree of integrity of the cement within the wellbore is determined based on the generated strain tensor map.
  • the pushing pulse emitted from the ultrasound transducer may elicit a displacement of the cement within a range of about ten to about one hundred microns depending on the ultrasonic frequency used and the pushing pulse energy.
  • the ultrasound transducer used to emit the pushing pulse may also be used to acquire the sequence of ultrasound images to estimate the displacement response to the pushing pulse.
  • Determining the degree of integrity of the cement within the wellbore based on the generated strain tensor map may include identifying one or more subregions within the cement based on disparities within the stain tensor map, characterizing each subregion within the cement based on values of the strain tensor map for each subregion and known strain tensors for various materials including cement, fluid and gas, and determining if there is one or more channels present within the cement based on the characterizations of the subregions.
  • remedial actions may be performed to improve the integrity of the cement.
  • the remedial action may include agitating the cement within the wellbore before the cement hardens.
  • a computer system includes a processor and a non-transitory, tangible, program storage medium, readable by the computer system, embodying a program of instructions executable by the processor to perform method steps for deploying cement in a wellbore.
  • the method includes controlling a pumping of cement into a wellbore, controlling a deployment of an ultrasound transducer into the wellbore. An emission of a pushing pulse or train of pulses from the ultrasound transducer is controlled to elicit a
  • a sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse.
  • a strain tensor map is generated from the acquired sequence of ultrasound images. The presence of channels within the cement within the wellbore is detected based on the generated strain tensor map.
  • An agitating of the cement within the wellbore is controlled to reduce the channels when it is determined that channels are present within the cement. Additional cement may be pumped into the wellbore after the cement already pumped into the wellbore has been sufficiently agitated to reduce the channels.
  • the pushing pulse emitted from the ultrasound transducer may elicit a
  • the ultrasound transducer used to emit the pushing pulse may also be used to acquire the sequence of ultrasound images.
  • Detecting the presence of channels within the cement within the wellbore based on the generated strain tensor map may include identifying one or more subregions within the cement based on disparities within the stain tensor map, characterizing each subregion within the cement based on values of the strain tensor map for each subregion and known strain tensors for various materials including cement, fluid and gas, and determining if there is one or more channels present within the cement based on the characterizations of the subregions.
  • FIG. 1 is a schematic diagram illustrating an apparatus for performing cement integrity inspection using elastography in accordance with exemplary embodiments of the present invention
  • FIG. 2 is a flow chart illustrating a method for performing cement integrity inspection using elastography in accordance with exemplary embodiments of the present invention
  • FIG. 3 is a flow chart illustrating an approach for performing cement deployment in accordance with exemplary embodiments of the present invention.
  • FIG. 4 shows an example of a computer system capable of implementing the method and apparatus according to embodiments of the present disclosure.
  • Exemplary embodiments of the present invention seek to provide approaches for detecting imperfections such as cracks, flaws, fissures, mudcake, etc. within wellborn cement using elastography.
  • Elastrography is a method for imaging soft tissue within the human body to differentiate between tumors and healthy tissue.
  • mechanical compression or vibration is applied to the tissue under study and tissue stiffness elasticity is gauged by ultrasonic imaging.
  • tumorous tissue is understood to have a greater stiffness than healthy tissue, tumors may be detected and evaluated.
  • the degree of elasticity/stiffness may be measured, for example, by measuring tissue displacement and building a strain tensor map which describes the displacement across the tissue. The strain tensor map may thereafter be used to distinguish different subregions of tissue based on their elasticity.
  • Exemplary embodiments of the present invention adapt elastography techniques to the imaging of wellbore cement.
  • exemplary embodiments of the present invention operate on the understanding that channels within the cement may contain mud, liquids, or gasses, which may have different elasticity than the cement itself.
  • Exemplary embodiments of the present invention may deploy an ultrasound device down the casing, for example, via a wireline.
  • the ultrasound device may include an ultrasound transducer that may emit a pushing pulse.
  • the pushing pulse may then provoke a displacement throughout the cement on the order of 10- 100 microns.
  • the ultrasound device may immediately thereafter image the cement material beyond the casing and capture displacement over time throughout the cement.
  • a strain map may then be computed from the acquired displacement data. As the elasticity properties of mudcake, drilling mud, cured cement, air, and water may be sufficiently distinct, one or more different regions may be observable from the strain map and accordingly, one or more channels may be automatically detected therefrom.
  • the cement so examined may either be cement located outside of the well casing and inside the wellbore walls, for example, primary cementing, or the cement so examined may fill the interior of the casing, for example, a well plug.
  • the techniques discussed herein may be applied to imaging all examples of cement inside and beyond the well casing.
  • FIG. 1 is a schematic diagram illustrating an apparatus for performing cement integrity inspection using elastography in accordance with exemplary embodiments of the present invention.
  • FIG. 2 is a flow chart illustrating a method for performing cement integrity inspection using elastography in accordance with exemplary embodiments of the present invention.
  • a drilling pipe is lowered from a platform or rig 11.
  • the drilling pipe may be lowered from the water surface 12 down past the seafloor 13.
  • a drill bit (not shown) may perform a drilling operation to displace the seabed and create the wellbore 14.
  • the drilling pipe may be lowered an additional distance.
  • the wellbore 14 may come under considerable pressure.
  • the wellbore 14 may communicate with hydrocarbon deposits, such as accumulations of petroleum and/or methane, which may be collected. However, collection of the hydrocarbons may involve removing the drilling apparatus from the wellbore 14 and setting up colleting apparatus.
  • a drilling mud may be deployed into the wellbore 14 as the drilling is being performed and the drilling mud may be replaced with cement 15 while the drilling apparatus is being removed from the wellbore 14 and prior to the deployment of the collecting apparatus.
  • cement also has a variety of other applications within deep water drilling.
  • cement may be placed within the annular void between the well casing and the wellbore.
  • Cement may also be used for zonal isolation (e.g. hydraulic bond) to prevent migration of fluids up the wellbore, to support the axial load of the casing (e.g. shear bond), and to support the borehole and prevent formation collapse.
  • the cement 15, which may be delivered through a riser pipe that is lowered into the wellbore 14, may play an important role in stabilizing the wellbore 14 before the collecting apparatus can be successfully deployed. If the integrity of the cement 15 is not assured, the hydrocarbons may travel up the wellbore 14 causing a potentially catastrophic blowout at the rig or platform 11.
  • exemplary embodiments of the present invention deploy an ultrasound transducer 17 down into the wellbore 14 via a wireline 16 (Step S21).
  • the ultrasound transducer 17, or another imaging device may be used to acquire one or more reference ultrasound images of the cement 15 within the wellbore 14 (Step S22) imaging the cement 15 prior to the application of the pushing pulse.
  • the ultrasound transducer 17 may then emit a pushing pulse (Step S23).
  • the pushing pulse may be sufficient to create a displacement within the cement 15.
  • a displacement on the order of between 10 and 100 microns within the cement 15 may be created by the pushing pulse.
  • the transducer 17, or the other imaging device may then perform an ultrasound imaging of the cement 15 (Step S24).
  • the ultrasound imaging may include the acquisition of a series of images over time.
  • a strain tensor map describing the deformation of the imaged cement 15 may then be calculated from the ultrasound imaging (Step S25), for example, by determining a difference between the reference images taken before the pushing pulse and the ultrasound images taken after the pushing pulse.
  • the resulting strain tensor map may then be analyzed to identify a plurality of subregions within the images cement 15 (Step S26).
  • Each of the identified subregions may then be characterized based on a degree of displacement caused by the pushing pulse that is observed from the ultrasound imaging (Step S27). Characterization of the subregions may include determining whether the subregion is solid cement or channels containing drilling mud, liquid or gas, as each substance may have a known degree of displacement, given the pushing pulse. From the characterization of the subregions, it may be determined whether the cement has been effectively deployed (Step S28).
  • FIG. 3 is a flow chart illustrating an approach for performing cement deployment in accordance with exemplary embodiments of the present invention.
  • Step S31 Cement may be deployed to a lower section wellbore (Step S31).
  • an elastographic study may be performed on the cement so-deployed (Step S32).
  • the elastographic study may be performed substantially as described above with reference to FIGS. 1 and 2. It may then be determined, based on the elastographic study, whether the deployed and unhardened cement is substantially free of channels (Step S33). If the deployed cement is determined to be substantially free of channels based on the elastographic study (Yes, Step S33), then deployment of cement may continue (Step S31).
  • the continued deployment of the cement may include the filling of a next section of the wellbore. However, deployment of the cement may be continuous from step to step.
  • Step S34 remedial action may include, for example, agitating the deployed wet cement. While the pouring of the cement may be continuous for as long as the cement is substantially free of channels, once channels are detected, the pouring of the cement may be stopped or slowed down while remedial action is performed until the cement is deemed to be substantially free of channels.
  • Step S34 the agitation of the cement (Step S34), or perhaps while it is being conducted, the elastographic study may be repeated (Step S32) until the cement is substantially free of channels (Yes, Step S33), at which point deployment may continue (Step S31) until the cement is fully deployed.
  • Agitation of the cement and other remedial action may include the use of one or more acoustic beams.
  • the acoustic beams may be, for example, high intensity focused ultrasound (HIFU).
  • HIFU high intensity focused ultrasound
  • Acoustic beams may be highly localized and may have the ability to impart localized vibrations to cause liquefaction of the cement in and around the vicinity of the channels in a phenomenon that is similar to soil liquefaction, in which seismic activity causes hard ground to obtain a nearly liquid consistency. Liquefaction may be performed to remediate detected channels even where the cement has partially or entirely cured.
  • the acoustic beams may be produced by one or more transducers, for example, by an array of transducers. A highly focused region of maximum acoustic impact may be directed and adjusted electronically for the desired purpose.
  • One or more elastographic study pushing pulses may additionally or alternatively be used to effect the ultrasonic remediation.
  • a prior elastographic or simple imaging study may reveal a region needing agitation of cement.
  • a reference ultrasound image may be acquired.
  • a high power focused ultrasonic beam may then be applied to liquefy the cement and cause displacement.
  • An ultrasound image may then be acquired allowing immediate confirmation of whether liquefaction has occurred.
  • High power focused sonication may then resume, and sonication may be interrupted, for example, briefly, to acquire addition monitoring of the progress of remediation.
  • the steps of imaging and high power focused sonication can be repeated continuously providing continuous feedback during the remediation process.
  • the acoustic beam may be pulsed on and off electronically at any desired rate to impart a localized vibration sufficient to cause liquefaction.
  • An optimum frequency for causing liquefaction may be chosen based on prior knowledge of the cement mechanics or elastographic imaging, such as is described above, may be used to determine when liquefaction has occurred. Once the cement material has been liquefied, it may readily displace in response to the pushing pulse.
  • liquefaction may cause cement material above the treated area to give way, remediation at a lower position may give rise to additional channels at a higher point, accordingly, liquefaction may be performed at increasingly upwards positions within the wellbore until all cement therein is free of channels.
  • Step S32 performance of the elastographic study may include raising the ultrasound transducer to the next section so that the newly deployed cement may be tested, for example, in the manner discussed above.
  • FIG. 4 shows an example of a computer system which may implement a method and system of the present disclosure.
  • the system and method of the present disclosure may be implemented in the form of a software application running on a computer system, for example, a mainframe, personal computer (PC), handheld computer, server, etc.
  • the software application may be stored on a recording media locally accessible by the computer system and accessible via a hard wired or wireless connection to a network, for example, a local area network, or the Internet.
  • the computer system referred to generally as system 1000 may include, for example, a central processing unit (CPU) 1001, random access memory (RAM) 1004, a printer interface 1010, a display unit 101 1, a local area network (LAN) data transmission controller 1005, a LAN interface 1006, a network controller 1003, an internal bus 1002, and one or more input devices 1009, for example, a keyboard, mouse etc.
  • the system 1000 may be connected to a data storage device, for example, a hard disk, 1008 via a link 1007.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Geophysics (AREA)
  • Quality & Reliability (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Cette invention concerne un procédé permettant d'étudier l'intégrité du ciment dans un puits de forage, ledit procédé comprenant le déploiement d'un transducteur ultrasonore à l'intérieur d'un puits de forage (S21) ; l'acquisition d'une ou de plusieurs images ultrasonores du ciment dans le puits de forage (S22) ; la génération d'une impulsion de poussée par le transducteur ultrasonore pour déclencher un déplacement du ciment dans le puits de forage (S23) ; et l'acquisition d'une série d'images ultrasonores, dans le temps, illustrant le déplacement du ciment dans le puits de forage déclenché par l'impulsion de poussée (S24). Une carte des tenseurs de déformation est générée à partir de la différence entre la ou les images ultrasonores de référence et la série d'images ultrasonores acquises (S25) et le degré d'intégrité du ciment dans le puits de forage est déterminé en fonction de la carte des tenseurs de déformation qui a été générée (S27).
PCT/US2013/042844 2012-06-15 2013-05-28 Élastographie pour inspecter l'intégrité du ciment dans un puits de forage WO2013188092A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201261660147P 2012-06-15 2012-06-15
US61/660,147 2012-06-15
US13/871,346 US20140321240A1 (en) 2013-04-26 2013-04-26 Elastography for cement integrity inspection
US13/871,346 2013-04-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114354885A (zh) * 2021-12-20 2022-04-15 应急管理部国家自然灾害防治研究院 一种用于波流环境中海床地震液化的快速识别测量装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992021023A1 (fr) * 1991-05-10 1992-11-26 Board Of Regents, The University Of Texas System Procede et appareil de mesure et d'imagerie elastographique
US5638337A (en) * 1996-08-01 1997-06-10 Western Atlas International, Inc. Method for computing borehole geometry from ultrasonic pulse echo data
EP1653043A1 (fr) * 2004-11-02 2006-05-03 Services Petroliers Schlumberger Appareil et procédé de traitement de puits de pétrole
US20110080806A1 (en) * 2009-12-08 2011-04-07 Randy Allen Normann System and method for geothermal acoustic interface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992021023A1 (fr) * 1991-05-10 1992-11-26 Board Of Regents, The University Of Texas System Procede et appareil de mesure et d'imagerie elastographique
US5638337A (en) * 1996-08-01 1997-06-10 Western Atlas International, Inc. Method for computing borehole geometry from ultrasonic pulse echo data
EP1653043A1 (fr) * 2004-11-02 2006-05-03 Services Petroliers Schlumberger Appareil et procédé de traitement de puits de pétrole
US20110080806A1 (en) * 2009-12-08 2011-04-07 Randy Allen Normann System and method for geothermal acoustic interface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114354885A (zh) * 2021-12-20 2022-04-15 应急管理部国家自然灾害防治研究院 一种用于波流环境中海床地震液化的快速识别测量装置
CN114354885B (zh) * 2021-12-20 2023-07-14 应急管理部国家自然灾害防治研究院 一种用于波流环境中海床地震液化的快速识别测量装置

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