公开(公告)号：US20180210110A1

公开(公告)日：2018-07-26

申请号：US15894023

申请日：2018-02-12

Applicant: Schlumberger Technology Corporation

Inventor： Kenneth E. Stephenson ,  David Rose ,  Avtandil Tkabladze ,  Christian Stoller ,  John J. Simonetti

IPC: G01V5/10

CPC classification number: G01V5/104 ,  G01V5/101

Abstract: Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.

公开(公告)号：US10007024B2

公开(公告)日：2018-06-26

申请号：US14965396

申请日：2015-12-10

Applicant: Schlumberger Technology Corporation

Inventor： Avtandil Tkabladze

IPC: G01V5/12

CPC classification number: G01V5/125 ,  G01V5/12

Abstract: The techniques and device provided herein relate to regulating a source generator in X-ray based measurement for downhole applications. A source stream of photons is produced, via a generator of an X-ray system of a logging tool. A direct channel allows for the passage of a stream of photons, where a high energy filter filters a low energy part of the stream of photons. The resultant stream is measured by a reference detector to identify a high energy peak in a spectrum measurement derived based upon the resultant photon stream. From there, a normalized difference between a plurality of windows of the high energy peak is determined and subsequent output of the generator is based upon the normalized difference.

公开(公告)号：US20170146684A1

公开(公告)日：2017-05-25

申请号：US15422782

申请日：2017-02-02

Applicant: Schlumberger Technology Corporation

Inventor： Avtandil Tkabladze ,  Michael Lynn Evans ,  Kenneth Edward Stephenson

IPC: G01V5/10

CPC classification number: G01V5/108 ,  G01V5/104 ,  G01V5/105 ,  G01V5/107

Abstract: Systems, methods, and devices for determining a neutron-gamma density (NGD) measurement of a subterranean formation that is accurate in both liquid- and gas-filled formations are provided. For example, a downhole tool for obtaining such an NGD measurement may include a neutron generator, a neutron detector, two gamma-ray detectors, and data processing circuitry. The neutron generator may emit neutrons into a formation, causing a fast neutron cloud to form. The neutron detector may detect a count of neutrons representing the extent of the neutron cloud. The gamma-ray detectors may detect counts of inelastic gamma-rays caused by neutrons that inelastically scatter off the formation. Since the extent of the fast neutron cloud may vary depending on whether the formation is liquid- or gas-filled, the data processing circuitry may determine the density of the formation based at least in part on the counts of inelastic gamma-rays normalized to the count of neutrons.

公开(公告)号：US09052404B2

公开(公告)日：2015-06-09

申请号：US13728901

申请日：2012-12-27

Applicant: Schlumberger Technology Corporation

Inventor： Michael L. Evans ,  Avtandil Tkabladze ,  Christian Stoller

IPC: G01V5/08 ,  G01V5/04 ,  G01V5/10

CPC classification number: G01V5/08 ,  G01V5/04 ,  G01V5/10

Abstract: A well-logging device may include a housing to be positioned within a borehole of a subterranean formation, and at least one radiation source carried by the housing to direct radiation into the subterranean formation. The well-logging device may also include noble gas-based radiation detectors carried by the housing in azimuthally spaced relation to detect radiation from the subterranean formation. A controller may determine at least one property of the subterranean formation based upon the detected radiation from the noble gas-based radiation detectors.

Abstract translation: 测井装置可以包括要定位在地下地层的钻孔内的壳体，以及由壳体承载以将辐射引导到地下地层中的至少一个辐射源。 测井装置还可以包括以方位角间隔的关系由壳体承载的惰性气体辐射探测器，以检测来自地下地层的辐射。 控制器可以基于来自稀有气体的辐射检测器的检测到的辐射来确定地下地层的至少一个性质。

公开(公告)号：US10698129B2

公开(公告)日：2020-06-30

申请号：US15996655

申请日：2018-06-04

Applicant: Schlumberger Technology Corporation

Inventor： Avtandil Tkabladze

IPC: G01V5/10 ,  H01J35/12 ,  G01V5/12

Abstract: The techniques and device provided herein relate to regulating a source generator in X-ray based measurement for downhole applications. A source stream of photons is produced, via a generator of an X-ray system of a logging tool. A direct channel allows for the passage of a stream of photons, where a high energy filter filters a low energy part of the stream of photons. The resultant stream is measured by a reference detector to identify a high energy peak in a spectrum measurement derived based upon the resultant photon stream. From there, a normalized difference between a plurality of windows of the high energy peak is determined and subsequent output of the generator is based upon the normalized difference.

公开(公告)号：US10162079B2

公开(公告)日：2018-12-25

申请号：US15422782

申请日：2017-02-02

Applicant: Schlumberger Technology Corporation

Inventor： Avtandil Tkabladze ,  Michael Lynn Evans ,  Kenneth Edward Stephenson

IPC: G01V5/10

Abstract: Systems, methods, and devices for determining a neutron-gamma density (NGD) measurement of a subterranean formation that is accurate in both liquid- and gas-filled formations are provided. For example, a downhole tool for obtaining such an NGD measurement may include a neutron generator, a neutron detector, two gamma-ray detectors, and data processing circuitry. The neutron generator may emit neutrons into a formation, causing a fast neutron cloud to form. The neutron detector may detect a count of neutrons representing the extent of the neutron cloud. The gamma-ray detectors may detect counts of inelastic gamma-rays caused by neutrons that inelastically scatter off the formation. Since the extent of the fast neutron cloud may vary depending on whether the formation is liquid- or gas-filled, the data processing circuitry may determine the density of the formation based at least in part on the counts of inelastic gamma-rays normalized to the count of neutrons.

公开(公告)号：US09823385B1

公开(公告)日：2017-11-21

申请号：US15281348

申请日：2016-09-30

Applicant: Schlumberger Technology Corporation

Inventor： Sicco Beekman ,  Avtandil Tkabladze ,  Matthieu Simon

IPC: G01V5/08 ,  G01V5/12

CPC classification number: G01V5/12 ,  G01T7/005

Abstract: A system is disclosed for downhole logging. The system comprises a photon source configured to generate photons at different endpoint energies; at least one radiation detector configured to detect photons after interactions with a wellbore, a geological formation surrounding the wellbore, or both; an energy detection system configured to determine an endpoint energy of the photon source; and a processing system configured to determine properties of a wellbore, a geological formation, or both, based on photons detected at the at least one radiation detector and the endpoint energy determined by the energy detection system.

公开(公告)号：US20140034821A1

公开(公告)日：2014-02-06

申请号：US13728901

申请日：2012-12-27

Applicant: Schlumberger Technology Corporation

Inventor： Michael L. Evans ,  Avtandil Tkabladze ,  Christian Stoller

IPC: G01V5/08

CPC classification number: G01V5/08 ,  G01V5/04 ,  G01V5/10

Abstract: A well-logging device may include a housing to be positioned within a borehole of a subterranean formation, and at least one radiation source carried by the housing to direct radiation into the subterranean formation. The well-logging device may also include noble gas-based radiation detectors carried by the housing in azimuthally spaced relation to detect radiation from the subterranean formation. A controller may determine at least one property of the subterranean formation based upon the detected radiation from the noble gas-based radiation detectors.

Abstract translation: 测井装置可以包括要定位在地下地层的钻孔内的壳体，以及由壳体承载以将辐射引导到地下地层中的至少一个辐射源。 测井装置还可以包括以方位角间隔的关系由壳体承载的惰性气体辐射探测器，以检测来自地下地层的辐射。 控制器可以基于来自稀有气体的辐射检测器的检测到的辐射来确定地下地层的至少一个性质。

公开(公告)号：US20230258073A1

公开(公告)日：2023-08-17

申请号：US18006167

申请日：2021-07-23

Applicant: Schlumberger Technology Corporation

Inventor： Justin Mlcak ,  Sicco Beekman ,  Avtandil Tkabladze

IPC: E21B47/11 ,  E21B47/01

CPC classification number: E21B47/111 ,  E21B47/01

Abstract: Systems, methods, and devices are provided for radiation detector windows that have an improved shape or density and/or provide collimation of radiation that passes through. Thus, a radiation-based logging tool may include a source that emits radiation and a detector that detects, through a detector window, a first portion of the radiation scattered off of a geological formation. The detector window may include a dome having a first surface and a second surface and a support structure that provides support for the dome. The detector window may include a window insert that shields the detector from a second portion of the radiation.

公开(公告)号：US10062467B2

公开(公告)日：2018-08-28

申请号：US15373630

申请日：2016-12-09

Applicant: Schlumberger Technology Corporation

Inventor： Avtandil Tkabladze ,  Justin Dale Mlcak ,  Sicco Beekman ,  Matthieu Simon

IPC: G01V5/12 ,  G21K1/10 ,  G01N23/223 ,  G01V5/08 ,  H01J35/00

CPC classification number: G21K1/10 ,  G01N23/223 ,  G01N2223/20 ,  G01N2223/616 ,  G01V5/08 ,  G01V5/12 ,  H01J35/00 ,  H05G1/02

Abstract: The techniques and device provided herein relate to regulating a source generator in an X-ray based equipment. In particular, an X-ray system is provided that comprises an X-ray generator and a reference detector system that regulates the output of the X-ray generator. The reference detector system comprises a direct channel that allows at least a portion of the photons to directly reach the detector crystal and a plurality of fluorescent channels, such that photon flux entering the reference detector from the fluorescent channels is negligibly impacted by variations of beam spots, shapes and/or positions.