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公开(公告)号：US12061308B2
公开(公告)日：2024-08-13
申请号：US17929446
申请日：2022-09-02
Applicant: Schlumberger Technology Corporation
Inventor： James Grau , Jeffrey Miles , Richard Radtke , Laurent Mosse , ZhanGuo Shi , David Rose
IPC: G01V5/10
CPC classification number: G01V5/102
Abstract: Systems and method presented herein enable the estimation of porosity using neutron-induced gamma ray spectroscopy. For example, the systems and methods presented herein include receiving, via a control and data acquisition system, data relating to energy spectra of gamma rays captured by one or more gamma ray detectors of a neutron-induced gamma ray spectroscopy logging tool. The method also includes deriving, via the control and data acquisition system, one or more spectral yields relating to one or more elemental components from the data relating to the energy spectra of the gamma rays. The method further includes estimating, via the control and data acquisition system, a measurement of porosity based on the one or more spectral yields relating to the one or more elemental components.
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2.发明授权Neutron porosity based on one or more gamma ray detectors and a pulsed neutron source 有权基于一个或多个伽马射线检测器和脉冲中子源的中子孔隙率公开(公告)号：US09268056B2
公开(公告)日：2016-02-23
申请号：US13851872
申请日：2013-03-27
Applicant: Schlumberger Technology Corporation
Inventor： Tong Zhou , David Rose
IPC: G01V5/10
Abstract: A method for pulsed neutron well logging of a subsurface formation, includes irradiating the formation with a plurality of bursts of neutrons of a group of selected durations; detecting gamma rays resulting from interaction of the neutrons during a group of selected time gates which contains at least some early and late gamma ray counts. The gamma rays are detected at at least two axially spaced apart locations from a position of the irradiating. A weighted sum of the numbers of gamma rays detected in each of the time gates is calculated. A ratio of the weighted sum of detected gamma rays at a first axial spacing to the weighted sum at a second axial spacing is determined. The ratio is used to determine a hydrogen index of the subsurface formation.
Abstract translation: 用于地下地层的脉冲中子测井的方法包括用多组选定持续时间的一组中子照射地层; 检测在包含至少一些早期和晚期伽马射线计数的所选择的时间门组期间由中子的相互作用产生的伽马射线。 在与照射位置的至少两个轴向间隔开的位置处检测伽马射线。 计算在每个时间门中检测到的伽马射线的数量的加权和。 确定在第一轴向间隔处的检测到的伽马射线的加权和与第二轴向间隔处的加权和的比率。 该比率用于确定地下地层的氢指数。
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3.发明申请Neutron Porosity Based On One Or More Gamma Ray Detectors And A Pulsed Neutron Source 有权基于一个或多个伽马射线探测器和脉冲中子源的中子孔隙率公开(公告)号：US20140042311A1
公开(公告)日：2014-02-13
申请号：US13851872
申请日：2013-03-27
Applicant: Schlumberger Technology Corporation
Inventor： Tong Zhou , David Rose
IPC: G01V5/10
Abstract: A method for pulsed neutron well logging of a subsurface formation, includes irradiating the formation with a plurality of bursts of neutrons of a group of selected durations; detecting gamma rays resulting from interaction of the neutrons during a group of selected time gates which contains at least some early and late gamma ray counts. The gamma rays are detected at at least two axially spaced apart locations from a position of the irradiating. A weighted sum of the numbers of gamma rays detected in each of the time gates is calculated. A ratio of the weighted sum of detected gamma rays at a first axial spacing to the weighted sum at a second axial spacing is determined. The ratio is used to determine a hydrogen index of the subsurface formation.
Abstract translation: 用于地下地层的脉冲中子测井的方法包括用多组选定持续时间的一组中子照射地层; 检测在包含至少一些早期和晚期伽马射线计数的所选择的时间门组期间由中子的相互作用产生的伽马射线。 在与照射位置的至少两个轴向间隔开的位置处检测伽马射线。 计算在每个时间门中检测到的伽马射线的数量的加权和。 确定在第一轴向间隔处的检测到的伽马射线的加权和与第二轴向间隔处的加权和的比率。 该比率用于确定地下地层的氢指数。
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公开(公告)号：US11808138B2
公开(公告)日：2023-11-07
申请号：US17287542
申请日：2019-10-24
Applicant: Schlumberger Technology Corporation
Inventor： Yevgeniy Karpekin , Heri Tanjung , Ashish Datey , Gustavo Dip , David Rose
Abstract: A method for determining the gas pressure may include generating, via a downhole tool, neutron radiation in a cased wellbore of a geological formation and measuring a response to the neutron radiation. The method may also include determining, via a processor, at least one of a sigma, a neutron porosity, or a fast-neutron cross-section of the formation. Additionally, an equation of state of the gas may be estimated, and a gas pressure of the gas may be determined by solving a relationship, based at least in part on the equation of state, between the gas pressure and the at least one of the sigma, the neutron porosity, or the fast-neutron cross-section.
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公开(公告)号：US20210318461A1
公开(公告)日：2021-10-14
申请号：US17287542
申请日：2019-10-24
Applicant: Schlumberger Technology Corporation
Inventor： Yevgeniy Karpekin , Heri Tanjung , Ashish Datey , Gustavo Dip , David Rose
Abstract: A method for determining the gas pressure may include generating, via a downhole tool, neutron radiation in a cased wellbore of a geological formation and measuring a response to the neutron radiation. The method may also include determining, via a processor, at least one of a sigma, a neutron porosity, or a fast-neutron cross-section of the formation. Additionally, an equation of state of the gas may be estimated, and a gas pressure of the gas may be determined by solving a relationship, based at least in part on the equation of state, between the gas pressure and the at least one of the sigma, the neutron porosity, or the fast-neutron cross-section.
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Patent Agency Ranking
公开(公告)号：US11073635B2
公开(公告)日：2021-07-27
申请号：US16442302
申请日：2019-06-14
Applicant: Schlumberger Technology Corporation
Inventor： Tong Zhou , David Rose , Jeffrey Miles
IPC: G01V5/10
Abstract: Elemental concentrations in subterranean formations may be determined using neutron spectroscopy. For example, neutrons may be emitted by a downhole tool into the formation and produce gamma rays via inelastic scattering of fast neutrons or capture of slow neutrons. The borehole surrounding a downhole tool may introduce artifacts in the neutron spectroscopy measurement. Embodiments of the present disclosure are directed to techniques that reduce artifacts signals in downhole tools that include one or multiple detectors based at least in part on the inelastic and capture measurements.
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公开(公告)号：US20210389495A1
公开(公告)日：2021-12-16
申请号：US17460825
申请日：2021-08-30
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：US20240077637A1
公开(公告)日：2024-03-07
申请号：US17929446
申请日：2022-09-02
Applicant: Schlumberger Technology Corporation
Inventor： James Grau , Jeffrey Miles , Richard Radtke , Laurent Mosse , ZhanGuo Shi , David Rose
IPC: G01V5/10
CPC classification number: G01V5/102
Abstract: Systems and method presented herein enable the estimation of porosity using neutron-induced gamma ray spectroscopy. For example, the systems and methods presented herein include receiving, via a control and data acquisition system, data relating to energy spectra of gamma rays captured by one or more gamma ray detectors of a neutron-induced gamma ray spectroscopy logging tool. The method also includes deriving, via the control and data acquisition system, one or more spectral yields relating to one or more elemental components from the data relating to the energy spectra of the gamma rays. The method further includes estimating, via the control and data acquisition system, a measurement of porosity based on the one or more spectral yields relating to the one or more elemental components.
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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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10.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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