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公开(公告)号：US11815646B2
公开(公告)日：2023-11-14
申请号：US17258197
申请日：2019-07-08
Applicant: Schlumberger Technology Corporation
Inventor： Marie-Laure Mauborgne , Christian Stoller
IPC: G01V5/06
CPC classification number: G01V5/06
Abstract: A method for making natural gamma ray measurements of a subterranean formation includes causing a natural gamma ray sensor on an LWD tool to acquire a spectral gamma ray measurement while a neutron source emits neutrons. The measurements are evaluated to compute first and second drilling fluid activation corrections using corresponding first and second correction methodologies. The first and second corrections are processed to compute a third drilling fluid activation correction which is applied to the gamma ray measurements to compute a corrected total natural gamma ray measurement.
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公开(公告)号：US20220115157A1
公开(公告)日：2022-04-14
申请号：US17532507
申请日：2021-11-22
Applicant: Schlumberger Technology Corporation
Inventor： Luke T. Perkins , Christian Stoller , Peter Wraight
IPC: G21G4/02 , H05H3/06 , H01J35/14 , H05G1/10 , H01J35/04 , H01J35/00 , H05G1/02 , H05G1/00 , G01V5/10
Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.
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公开(公告)号：US11105952B2
公开(公告)日：2021-08-31
申请号：US16263603
申请日：2019-01-31
Applicant: Schlumberger Technology Corporation
Inventor： Pascal Millot , Adil Busaidy , Jeffrey Miles , Tong Zhou , Christian Stoller , David Rose , Richard Radtke
Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.
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公开(公告)号：US20210230954A1
公开(公告)日：2021-07-29
申请号：US17258197
申请日：2019-07-08
Applicant: Schlumberger Technology Corporation
Inventor： Marie-Laure Mauborgne , Christian Stoller
Abstract: A method for making natural gamma ray measurements of a subterranean formation includes causing a natural gamma ray sensor on an LWD tool to acquire a spectral gamma ray measurement while a neutron source emits neutrons. The measurements are evaluated to compute first and second drilling fluid activation corrections using corresponding first and second correction methodologies. The first and second corrections are processed to compute a third drilling fluid activation correction which is applied to the gamma ray measurements to compute a corrected total natural gamma ray measurement.
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公开(公告)号：US10746895B2
公开(公告)日：2020-08-18
申请号：US16670002
申请日：2019-10-31
Applicant: Schlumberger Technology Corporation
Inventor： Tong Zhou , Christian Stoller , James Leslie Thornton , David Alan Rose
Abstract: A method for determining a fractional volume of at least one component of a formation includes entering into a computer a number of detected radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 million electron volts (MeV). The detected radiation events correspond to at least one of an energy level of the imparted neutrons and thermal or epithermal energy neutrons. A measurement of at least one additional petrophysical parameter of the formation is made. The at least one additional petrophysical parameter measurement and at least one of a fast neutron cross-section and a thermal neutron cross-section determined from the detected radiation events are used in the computer to determine the fractional volume of the at least one component of the formation. In another embodiment, the fast neutron cross-section and the thermal neutron cross-section may be used on combination to determine the fractional volume.
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Patent Agency Ranking
公开(公告)号：US20200081149A1
公开(公告)日：2020-03-12
申请号：US16670002
申请日：2019-10-31
Applicant: Schlumberger Technology Corporation
Inventor： Tong Zhou , Christian Stoller , James Leslie Thornton , David Alan Rose
IPC: G01V5/10
Abstract: A method for determining a fractional volume of at least one component of a formation includes entering into a computer a number of detected radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 million electron volts (MeV). The detected radiation events correspond to at least one of an energy level of the imparted neutrons and thermal or epithermal energy neutrons. A measurement of at least one additional petrophysical parameter of the formation is made. The at least one additional petrophysical parameter measurement and at least one of a fast neutron cross-section and a thermal neutron cross-section determined from the detected radiation events are used in the computer to determine the fractional volume of the at least one component of the formation. In another embodiment, the fast neutron cross-section and the thermal neutron cross-section may be used on combination to determine the fractional volume.
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公开(公告)号：US10564311B2
公开(公告)日：2020-02-18
申请号：US14041206
申请日：2013-09-30
Applicant: Schlumberger Technology Corporation
Inventor： Christian Stoller
Abstract: A method for determining azimuthal formation information using neutron activation, wherein the formation is activated by a neutron source and the activation signal is measured by at least one detector trailing the neutron source during the logging operation. The number of detected gamma rays as a function of the detector azimuth may be used to provide azimuthal information for determining an image of the formation surrounding the borehole.
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68.发明授权公开(公告)号：US10436918B2
公开(公告)日：2019-10-08
申请号：US15862695
申请日：2018-01-05
Applicant: Schlumberger Technology Corporation
Inventor： Ken Stephenson , Peter Wraight , Wolfgang Ziegler , John J. Simonetti , Christian Stoller , Irina Molodetsky
Abstract: A scintillator type radiation detector package is provided including a scintillation crystal directly coupled to the window of a photomultiplier. A scintillator package is also provided having a longer life at wellbore temperature with minimal deterioration of a hygroscopic scintillation crystal(s). Direct optical coupling of the scintillator to the photomultiplier reduces the amount of light lost at coupling interfaces and improved detection resolution over the conventional structures having separate packages for crystal and photomultiplier.
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69.发明申请公开(公告)号：US20190235125A1
公开(公告)日：2019-08-01
申请号：US16263603
申请日：2019-01-31
Applicant: Schlumberger Technology Corporation
Inventor： Pascal Millot , Adil Busaidy , Jeffrey Miles , Tong Zhou , Christian Stoller , David Rose , Richard Radtke
Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.
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公开(公告)号：US20190033484A1
公开(公告)日：2019-01-31
申请号：US15658654
申请日：2017-07-25
Applicant: Schlumberger Technology Corporation
Abstract: A method for evaluating cement in a cased wellbore in a geological formation includes placing a downhole tool into the cased wellbore, where the cased wellbore has been cased using a cement that contains a particular material. The method includes emitting neutrons using the downhole tool, wherein the neutrons interact with the particular material via inelastic scattering or capture of neutrons and cause the material to emit an energy spectrum of the gamma rays associated with the material or wherein the time-based measurement of gamma rays or neutrons is influenced by the presence of the material. The method includes using the downhole tool to detect radiation radiation, such as the energy spectrum of the gamma rays, or a die-away pattern of the gamma rays or neutrons that indicates a presence of the particular material and enable to estimate a parameter of the cement.
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