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    • 3. 发明授权
    • Determination of radioactive scale distribution using gamma ray logging
technique
    • 使用伽马射线测井技术测定放射性刻度分布
    • US06037585A
    • 2000-03-14
    • US959436
    • 1997-10-28
    • Larry L. Gadeken
    • Larry L. Gadeken
    • E21B47/10G01V5/06
    • E21B47/1015
    • A method for calculating the position and quantity of scale downhole, while avoiding the need to run a before log is provided. The method includes assessing the gamma ray spectra of both scale and tracers in a single logging pass. A matrix of multipliers for both borehole and formation radium is included in the data used to evaluate the gamma ray log. The radium in the formation is distinguished from radium near the borehole (scale) using the deflection of the relative distance curve and the resulting calculations of gamma ray energy attributable to scale are used to correct the measured gamma ray emissions attributed to the tracers. The method allows several tracers to be monitored with a single logging pass, even in a hole that has been previously produced and has been contaminated with radioactive scale.
    • 提供了一种用于计算井下位置和数量的方法,同时避免了在日志之前运行的需要。 该方法包括在单次测井通过中评估比例和示踪剂的伽马射线光谱。 用于评估伽马射线日志的数据中包括钻孔和地层镭的乘数矩阵。 使用相对距离曲线的偏转将地层中的镭与钻孔附近的镭(刻度)区分开来,并且归因于刻度的伽马射线能量的计算被用于校正归因于示踪剂的测量的伽马射线辐射。 该方法允许通过单次测井通过监测几个示踪剂,即使在先前已经生产并已被放射性标度污染的孔中。
    • 8. 发明授权
    • Induced gamma ray spectroscopy well logging system
    • 诱导γ射线光谱测井系统
    • US5434408A
    • 1995-07-18
    • US17898
    • 1993-02-16
    • Harry D. Smith, Jr.Larry L. Gadeken
    • Harry D. Smith, Jr.Larry L. Gadeken
    • G01V5/10
    • G01V5/101
    • A system for use in cased well boreholes for measuring gamma ray spectra induced by bombardment of earth formations in the vicinity of the borehole with fast neutrons. Monoenergetic fast neutrons emitted in repetitive pulses penetrate the borehole structure and enter earth formations in the vicinity of the borehole and are moderated by elastic and inelastic scattering to thermal energy and captured by the nuclei of elements in and about the borehole. A scintillation detector optically coupled to a photomultiplier detects gamma radiation induced by the neutrons and produces electrical pulses with amplitudes representative of the energy of gamma rays. A pulse height analyzer connected to the output of the detector and photomultiplier separates the electrical pulses into a spectrum representative of the gamma ray energy spectrum. A timing circuit generates time gate signals to separate the electrical pulses into those of fast neutron induced gamma rays, thermal neutron capture gamma rays, and background gamma rays prior to sending the pulses to the pulse height analyzer. The timing cycle has a fast subcycle in which pulses representative substantially only of fast neutron induced gamma rays and thermal neutron capture gamma rays are sent to the pulse height analyzer and a slow subcycle portion in which pulses substantially representative only of thermal neutron capture gamma rays and background gamma rays are sent to the pulse height analyzer.
    • 一种用于测量通过在具有快中子的钻孔附近轰击地层形成而产生的伽马射线光谱的套管井眼井眼系统。 以重复脉冲发射的单能快中子穿透钻孔结构,并进入钻孔附近的地层,并通过弹性和非弹性散射到热能并被钻孔内和周围的元素的核捕获而缓和。 光耦合到光电倍增管的闪烁检测器检测由中子诱发的伽马辐射并产生具有代表γ射线能量的幅度的电脉冲。 连接到检测器和光电倍增管的输出端的脉冲高度分析器将电脉冲分成代表伽马射线能谱的光谱。 在将脉冲发送到脉冲高度分析器之前,定时电路产生时间门信号以将电脉冲分离成快中子诱导的γ射线,热中子俘获伽马射线和背景伽马射线。 定时周期具有快速的子周期,其中基本上仅表示快中子诱导的γ射线和热中子俘获伽马射线的脉冲被发送到脉冲高度分析器和慢的子周期部分,其中基本仅代表热中子俘获伽马射线的脉冲和 背景伽马射线被发送到脉冲高度分析仪。
    • 9. 发明授权
    • Low-noise method for performing downhole well logging using gamma ray
spectroscopy to measure radioactive tracer penetration
    • 使用伽马射线光谱仪进行井下测井的低噪声方法来测量放射性示踪剂穿透
    • US5410152A
    • 1995-04-25
    • US193933
    • 1994-02-09
    • Larry L. Gadeken
    • Larry L. Gadeken
    • E21B43/04E21B43/267E21B47/08E21B47/10G01V5/04
    • E21B47/1015E21B43/04E21B43/267E21B47/082G01V5/04
    • A method for evaluating the penetration of downhole materials such as proppant, casing annulus fill, or packed gravel by radioactively tagging the material, conducting well logging with gamma ray spectroscopy equipment to generate data signals, and applying an improved low-noise processing routine to the data signals to determine the material's penetration diameter. After hydraulic fracturing, gravel packing, or cementing operations are performed on a cased well, the well is logged using gamma ray spectroscopy techniques. In an exemplary embodiment, the resultant data signals are divided into channels, sent uphole, consolidated into depth intervals, and summed into specified energy windows. The spectra are processed by a weighted least squares technique to represent the spectra as borehole and formation component signals. The relationship between the borehole and formation component signals, which may be expressed as a borehole-formation angle, is then applied to an empirically determined relationship between the borehole-formation angle and mean penetration diameter to provide a penetration diameter signal to assist in evaluating the distribution of the materials pumped downhole.
    • 一种用于通过放射性标记材料来评估井下材料如支撑剂,套管环填充物或填充砾石的渗透性的方法,使用γ射线光谱设备进行测井以产生数据信号,以及将改进的低噪声处理程序应用于 数据信号来确定材料的穿透直径。 在水力压裂之后,在套管井上进行砾石填充或固井操作,使用伽马射线光谱技术记录井。 在一个示例性实施例中,所得到的数据信号被分成通道,被发送到井上,合并成深度间隔,并且被合并到指定的能量窗口中。 光谱通过加权最小二乘法处理,以将光谱表示为钻孔和地层分量信号。 然后将钻孔和地层分量信号之间的关系(可以表示为井眼形成角度)应用于经验确定的井眼形成角度和平均穿透直径之间的关系,以提供穿透直径信号,以帮助评估 材料抽出井下的分布。