公开(公告)号：US20180210095A1

公开(公告)日：2018-07-26

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

IPC: G01T1/202 ,  H01J40/18 ,  G01T1/20 ,  G01V5/04

CPC classification number: G01T1/2023 ,  G01T1/2006 ,  G01V5/04 ,  H01J40/18

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.

公开(公告)号：US09823384B1

公开(公告)日：2017-11-21

申请号：US15248879

申请日：2016-08-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Jiaxin Wang ,  Libai Xu ,  Christian Stoller

IPC: G01V5/10 ,  G01F1/00 ,  E21B47/12 ,  E21B47/00 ,  E21B49/00 ,  E21B47/10

CPC classification number: G01V5/101 ,  E21B47/10 ,  E21B47/124 ,  E21B49/003 ,  G01F1/7042

Abstract: A method for estimating a drilling fluid flow rate in a subterranean wellbore includes processing an acquired gamma ray spectrum in combination with standard elemental spectra and at least one standard oxygen activation spectrum to compute an oxygen activation yield. The oxygen activation yield is further processed to estimate a drilling fluid flow rate and or to infer a borehole diameter change or a lost circulation event. The gamma ray spectrum is acquired using a logging string employing a neutron source and a natural gamma ray sensor.

公开(公告)号：US20170205529A1

公开(公告)日：2017-07-20

申请号：US15326920

申请日：2015-07-21

Applicant: Schlumberger Technology Corporation

Inventor： Frederic Gicquel ,  Olivier G. Philip ,  Christian Stoller ,  Zilu Zhou

IPC: G01V5/10 ,  G01T1/24

CPC classification number: G01V5/107 ,  G01T1/241 ,  G01V5/08

Abstract: Devices and methods for a rugged semiconductor radiation detector are provided. The semiconductor detector may include a hermetically sealed housing and a semiconductor disposed within the housing that has a first surface and a second surface opposite one another. A first metallization layer may at least partially cover the first surface of the semiconductor and a second metallization layer may at least partially cover the second surface of the semiconductor. The first metallization layer or the second metallization layer, or both, do not extend completely to an edge of the semiconductor, thereby providing a nonconductive buffer zone. This reduces electrical field stresses that occur when a voltage potential is applied between the first metallization layer and the second metallization layer and reduces a likelihood of electrical failure (e.g., due to arcing).

公开(公告)号：US09696455B2

公开(公告)日：2017-07-04

申请号：US14940048

申请日：2015-11-12

Applicant: Schlumberger Technology Corporation

Inventor： Richard J. Radtke ,  Christian Stoller ,  Michael D. Hackbart

IPC: G01V5/10 ,  G01V5/12

CPC classification number: G01V5/104

Abstract: The present disclosure describes a downhole tool that includes an electrically operated radiation generator that selectively outputs radiation to a surrounding environment based at least in part on supply of electrical power; a radiation detector that determines a first radiation metric based at least in part on first radiation measured when the electrically operated radiation generator is outputting radiation and that determines a second radiation metric based at least in part on second radiation measured when the electrically operated radiation generator is not outputting radiation; and a control system that determines whether the surrounding environment is properly shielded based at least in part on a relationship between the first radiation metric and the second radiation metric.

公开(公告)号：US20160274038A1

公开(公告)日：2016-09-22

申请号：US14663158

申请日：2015-03-19

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Dominic Joseph Brady ,  Reza Taherian ,  Gary Oddie ,  Christian Stoller

IPC: G01N23/00 ,  E21B49/00

CPC classification number: E21B49/00 ,  E21B47/10 ,  G01V5/12

Abstract: A downhole densitometer is used to determine one or more characteristics of a flowing fluid. The densitometer has one or more downhole x-ray sources and one or more downhole x-ray detectors. A fluid is allowed to flow past the x-ray sources. X-rays emitted by the x-ray sources and that have travelled through the flowing fluid are detected by the x-ray detectors. Characteristics of the flowing fluid are determined based on the detected x-rays. The densitometer may also have reference detectors used to measure a reference signal. The measured reference signal is used to normalize source emissions. The densitometer may be used as a permanent monitor and it may be used in conjunction with other sensors such as a flow-rate sensor or a capacitance sensor. The x-ray source may be, for example, a pyroelectric source, a radioisotopic source, or a traditional x-ray tube source.

Abstract translation: 井下密度计用于确定流动流体的一个或多个特性。 密度计具有一个或多个井下x射线源和一个或多个井下X射线探测器。 允许流体流过x射线源。 X射线检测器检测由X射线源发射并且通过流动流体的X射线。 基于检测到的x射线确定流动流体的特性。 密度计还可以具有用于测量参考信号的参考检测器。 测量的参考信号用于归一化源发射。 密度计可用作永久性监测器，并且可以与诸如流量传感器或电容传感器的其它传感器结合使用。 X射线源可以是例如热电源，放射性同位素源或传统的X射线管源。

公开(公告)号：US09417355B2

公开(公告)日：2016-08-16

申请号：US14144871

申请日：2013-12-31

Applicant: Schlumberger Technology Corporation

Inventor： Christian Stoller ,  Fabien Haranger ,  James Grau ,  Jeffrey Miles ,  Markus Berheide

IPC: G01V5/10 ,  E21B47/00

CPC classification number: G01V5/101 ,  E21B47/00 ,  G01V5/10

Abstract: Composition-matched downhole tools and methods for using such tools are provided. One such method includes emitting neutrons using a neutron source in the downhole tool to generate formation gamma rays in a surrounding formation. At the same time, however, some of the neutrons may interact with different parts of the downhole tool to form tool gamma rays. The gamma ray spectra of at least some of the formation gamma rays and the tool gamma rays may be detected using a gamma ray detector. The tool gamma rays from the different parts of the tool may have a substantially similar spectral shape. As such, a processor may be used to analyze the spectra of the tool gamma rays using a single tool background standard, thereby simplifying the analysis and improving the precision of the results.

Abstract translation: 提供了组合匹配的井下工具和使用这种工具的方法。 一种这样的方法包括在井下工具中使用中子源发射中子，以在周围地层中产生地层γ射线。 然而，同时，一些中子可能与井下工具的不同部分相互作用，以形成工具伽马射线。 可以使用γ射线检测器检测至少一些形成γ射线和工具伽马射线的伽马射线光谱。 来自工具的不同部分的工具伽马射线可以具有基本相似的光谱形状。 因此，处理器可以用于使用单个工具背景标准来分析工具伽马射线的光谱，从而简化分析并提高结果的精度。

公开(公告)号：US20160223708A1

公开(公告)日：2016-08-04

申请号：US15096069

申请日：2016-04-11

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  Christian Stoller

IPC: G01V5/10

CPC classification number: G01V5/107 ,  G01N33/24 ,  G01V5/101

Abstract: A method for determining a petrophysical property of a formation includes detecting radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 MeV. The petrophysical property is determined from an elastic scattering cross section of the formation. The elastic scattering cross-section related to a number of detected radiation events.

Abstract translation: 用于确定地层的岩石物理性质的方法包括检测以至少1MeV的能级施加中子到地层中产生的辐射事件。 岩石物理性质由地层的弹性散射截面确定。 与多个检测到的辐射事件相关的弹性散射截面。

公开(公告)号：US09069095B1

公开(公告)日：2015-06-30

申请号：US14108252

申请日：2013-12-16

Applicant: Schlumberger Technology Corporation

Inventor： Sicco Beekman ,  Christian Stoller ,  Robert Arthur Adolph

IPC: G01D18/00 ,  G01V5/10

CPC classification number: G01N23/05

Abstract: A method is described for obtaining an accurate and precise value for radiation output of a radiation generator. Radiation is generated in the radiation generator, and the radiation output of the radiation generator is measured using a radiation monitoring device. An instantaneous inferred radiation output is determined from operating parameters of the radiation generator, and over a period of time a calibration factor between the measured and the instantaneous inferred radiation output is determined. The accurate and precise value for radiation output is determined from the instantaneous inferred radiation output and the determined calibration factor.

Abstract translation: 描述了一种用于获得辐射发生器的辐射输出的精确和精确值的方法。 在辐射发生器中产生辐射，并且使用辐射监测装置测量辐射发生器的辐射输出。 从辐射发生器的运行参数确定瞬时推断的辐射输出，并且在一段时间内确定测量的和瞬时推断的辐射输出之间的校准因子。 辐射输出的准确和精确的值由瞬时推断的辐射输出和确定的校准因子确定。

公开(公告)号：US20150168592A1

公开(公告)日：2015-06-18

申请号：US14635430

申请日：2015-03-02

Applicant: Schlumberger Technology Corporation

Inventor： Christian Stoller ,  Peter Wraight ,  Bradley A. Roscoe

IPC: G01V5/10

CPC classification number: G01V5/102

Abstract: Systems and methods for measuring neutron-induced activation gamma-rays in a subterranean formation are provided. In one example, a downhole tool for measuring neutron-induced activation gamma-rays may include a neutron source and a gamma-ray detector. The neutron source may emit neutrons according to a pulsing scheme that includes a delay between two pulses. The delay may be sufficient to allow substantially all neutron capture events due to the emitted neutrons to cease. The gamma-ray detector may be configured to detect activation gamma-rays produced when elements activated by the emitted neutrons decay to a non-radioactive state.

Abstract translation: 提供了用于测量地下地层中的中子诱导活化γ射线的系统和方法。 在一个示例中，用于测量中子诱导的激活γ射线的井下工具可以包括中子源和γ射线检测器。 中子源可以根据包括两个脉冲之间的延迟的脉冲方案发射中子。 延迟可能足以允许由于发射的中子停止而基本上所有的中子俘获事件。 γ射线检测器可以被配置为检测由发射的中子激活的元素衰变到非放射性状态时产生的激活γ射线。

公开(公告)号：US20140346337A1

公开(公告)日：2014-11-27

申请号：US13901329

申请日：2013-05-23

Applicant: Schlumberger Technology Corporation

Inventor： Cornelis Huiszoon ,  Libai Xu ,  Christian Stoller

IPC: G01V5/08 ,  G01V13/00

CPC classification number: G01V5/08 ,  G01V5/06 ,  G01V13/00 ,  Y10T29/49826

Abstract: A well-logging tool may be positioned within a borehole of a subterranean formation. The well-logging tool may include a housing having an interior defining a dual-detector receiving chamber extending longitudinally, and having first and second portions, and a first azimuthal radiation detector carried by the first portion of the dual-detector receiving chamber. The first azimuthal radiation detector may include a first gamma-ray detector and a first photodetector associated with the first gamma-ray detector. The well-logging tool may include a second azimuthal radiation detector carried by the second portion of the dual-detector receiving chamber. The second azimuthal radiation detector may include a second gamma-ray detector and a second photodetector associated with the second gamma-ray detector.

Abstract translation: 测井工具可以定位在地层的钻孔内。 测井工具可以包括壳体，其具有限定纵向延伸并且具有第一和第二部分的双检测器接收室的内部，以及由双检测器接收室的第一部分承载的第一方位辐射检测器。 第一方位角辐射检测器可以包括第一伽马射线检测器和与第一伽马射线检测器相关联的第一光电检测器。 测井工具可以包括由双检测器接收室的第二部分承载的第二方位辐射检测器。 第二方位角辐射检测器可以包括与第二伽马射线检测器相关联的第二伽马射线检测器和第二光电检测器。