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公开(公告)号：US10247840B2
公开(公告)日：2019-04-02
申请号：US13748749
申请日：2013-01-24
发明人： Neal G. Skinner , Etienne M. Samson , Christopher L. Stokely , David A. Barfoot , John L. Maida, Jr.
摘要： A method of logging a well can include conveying an optical waveguide and at least one signal generator with a conveyance into the well, causing the signal generator to generate at least one signal in the well, and receiving the signal as distributed along the optical waveguide. A well logging system can include a conveyance with an optical waveguide, and at least one signal generator which is conveyed by the conveyance into a well with the optical waveguide, whereby the signal generator generates at least one signal received with the optical waveguide.
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2.发明申请Downhole Sensing Using Parametric Amplification with Squeezed or Entangled Light for Internal Mode Input 有权使用带有挤压或纠缠光的参数放大的井下感测用于内部模式输入公开(公告)号：US20160363690A1
公开(公告)日：2016-12-15
申请号：US15118071
申请日：2014-03-20
CPC分类号： G01V8/02 , E21B47/123 , G01V2210/1429 , G02F1/39 , G02F2001/392
摘要： A downhole sensing system includes an optical sensor that provides a light signal with at least one attribute related to a downhole parameter. The system also includes a parametric amplification module that amplifies the light signal using squeezed or entangled light for internal mode input. The system also includes a processing unit that determines a value for the downhole parameter based on the amplified light signal.
摘要翻译： 井下感测系统包括光学传感器，其向光信号提供与井下参数相关的至少一个属性。 该系统还包括一个参数放大模块，用于使用挤压或纠缠的光进行内部模式输入放大光信号。 该系统还包括一个处理单元，该处理单元基于放大的光信号确定井下参数的值。
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公开(公告)号：US10677703B2
公开(公告)日：2020-06-09
申请号：US16326965
申请日：2016-10-21
发明人： Li Gao , Christopher L. Stokely
摘要： Methods for determining a density of a fluid are provided. The method can include passing the fluid through a conduit, measuring a vibration of the conduit by distributed acoustic sensing via a fiber optic cable coupled to the conduit, and generating a vibrational signal indicative of the measured vibration. At least a portion of the vibration of the conduit can be produced by the fluid passing therethrough. The method can also include measuring a temperature of the conduit and generating a temperature signal indicative of the temperature. The method can further include calculating the density of the fluid passing through the conduit by using the vibrational signal and the temperature signal.
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公开(公告)号：US20190212238A1
公开(公告)日：2019-07-11
申请号：US16326965
申请日：2016-10-21
发明人： Li Gao , Christopher L. Stokely
IPC分类号： G01N9/24
摘要： Methods for determining a density of a fluid are provided. The method can include passing the fluid through a conduit, measuring a vibration of the conduit by distributed acoustic sensing via a fiber optic cable coupled to the conduit, and generating a vibrational signal indicative of the measured vibration. At least a portion of the vibration of the conduit can be produced by the fluid passing therethrough. The method can also include measuring a temperature of the conduit and generating a temperature signal indicative of the temperature. The method can further include calculating the density of the fluid passing through the conduit by using the vibrational signal and the temperature signal.
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公开(公告)号：US10012759B2
公开(公告)日：2018-07-03
申请号：US15118071
申请日：2014-03-20
CPC分类号： G01V8/02 , E21B47/123 , G01V2210/1429 , G02F1/39 , G02F2001/392
摘要： A downhole sensing system includes an optical sensor that provides a light signal with at least one attribute related to a downhole parameter. The system also includes a parametric amplification module that amplifies the light signal using squeezed or entangled light for internal mode input. The system also includes a processing unit that determines a value for the downhole parameter based on the amplified light signal.
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公开(公告)号：US10221682B2
公开(公告)日：2019-03-05
申请号：US15116499
申请日：2014-02-28
摘要： An illustrative downhole sensing system includes a phase-squeezer assembly, an interferometer with a downhole sensor on the sensing path, and a receiver. The phase squeezer assembly provides a phase-squeezed laser beam, preferably with a squeeze parameter greater than 2. Certain embodiments include a pulse generator that gates the phase-squeezed laser beam to form a sequence of phase-squeezed laser pulses, and may further include a compensator that converts the sequence of pulses into a sequence of double pulses with a slight frequency shift between the pulses in each pair. The interferometer conveys a reference portion of the phase-squeezed laser beam along a reference path and a sensing portion of the phase-squeezed laser beam along a sensing path. A downhole sensor along the sensing path provides the sensing portion of the phase-squeezed laser beam with a measurement-parameter dependent phase shift relative to the reference portion of the phase-squeezed laser beam, which is measured by the receiver.
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公开(公告)号：US09733120B2
公开(公告)日：2017-08-15
申请号：US14903503
申请日：2013-08-12
CPC分类号： G01H9/004 , E21B47/123 , G01D5/35361 , G01H3/00 , G01N29/14 , G01N29/2418 , G01N2201/088
摘要： A method and device for monitoring oil field operations with a fiber optic distributed acoustic sensor (DAS) that uses a continuous wave laser light source and modulates the continuous wave output of the laser light source with pseudo-random binary sequence codes.
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8.发明申请Downhole Sensing Systems and Methods Employing Squeezed Light Interferometry 审中-公开井下感应系统和采用挤压光干涉的方法公开(公告)号：US20170009571A1
公开(公告)日：2017-01-12
申请号：US15116499
申请日：2014-02-28
CPC分类号： E21B47/123 , E21B47/01 , E21B47/06 , E21B47/065 , E21B47/14 , G01B9/02 , G01V8/16
摘要： An illustrative downhole sensing system includes a phase-squeezer assembly, an interferometer with a downhole sensor on the sensing path, and a receiver. The phase squeezer assembly provides a phase-squeezed laser beam, preferably with a squeeze parameter greater than 2. Certain embodiments include a pulse generator that gates the phase-squeezed laser beam to form a sequence of phase-squeezed laser pulses, and may further include a compensator that converts the sequence of pulses into a sequence of double pulses with a slight frequency shift between the pulses in each pair. The interferometer conveys a reference portion of the phase-squeezed laser beam along a reference path and a sensing portion of the phase-squeezed laser beam along a sensing path. A downhole sensor along the sensing path provides the sensing portion of the phase-squeezed laser beam with a measurement-parameter dependent phase shift relative to the reference portion of the phase-squeezed laser beam, which is measured by the receiver.
摘要翻译： 示意性井下感测系统包括相位挤压器组件，在感测路径上具有井下传感器的干涉仪和接收器。 相位挤压器组件提供相位挤压的激光束，优选地具有大于2的挤压参数。某些实施例包括脉冲发生器，其对相位挤压的激光束进行栅极以形成相序挤压的激光脉冲序列，并且还可以包括 补偿器将脉冲序列转换成双脉冲序列，每对脉冲之间具有轻微的频移。 干涉仪沿着参考路径传送相位挤压的激光束的参考部分，并且沿着感测路径传送相位挤压的激光束的感测部分。 沿着感测路径的井下传感器提供了相位挤压的激光束的感测部分，其具有相对于相位挤压的激光束的参考部分的测量参数相关相移，其由接收器测量。
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