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    • 96. 发明授权
    • Nuclear well logging data acquistion system and method
    • 核测井资料采集系统及方法
    • US4749859A
    • 1988-06-07
    • US725841
    • 1985-04-22
    • Mathew G. Schmidt
    • Mathew G. Schmidt
    • G01V5/04G01V5/06G01V5/10G01V5/00
    • G01V5/101G01V5/04G01V5/06
    • A computer-based system and method for acquisition of nuclear well logging data, including downhole generation of energy and time spectral information. For acquiring energy spectrum data, a downhole multi-parameter analyzer is provided including a pulse height analyzer and memory. The analyzer converts each gamma ray pulse height into a digital code by peak detection, level and pulse pile-up discrimination, sample-and-hold, and analog-digital conversion. The digital code includes the address of a unique memory location or channel corresponding to the energy of the particular gamma ray. After a preselected time interval the memory channels collectively contain counts for each incremental energy band in the desired energy spectrum. The memory may then be interrogated by the downhole CPU for presentation of a gamma ray emission versus energy level plot. For acquiring temporal spectrum data, the multi-parameter analyzer also includes a memory address generator. The generator repeatedly produces a numerical sequence of memory address codes corresponding to a sequence of adjacent time windows relative to a reference start time, whereby the windows collectively comprise the time interval of the desired spectrum. Each time a gamma ray pulse is detected, the memory address generated at that time addresses a corresponding memory location and increments the count value resident therein. At conclusion of the time spectrum interval of interest the memory locations may be interrogated by the CPU and presented visually as a gamma ray emission count versus time plot.
    • 一种用于获取核测井数据的基于计算机的系统和方法,包括能量和时间光谱信息的井下生成。 为获得能谱数据,提供了一个井下多参数分析仪,包括脉冲高度分析仪和存储器。 分析仪通过峰值检测,电平和脉冲堆积鉴别,采样保持和模数转换将每个伽马射线脉冲高度转换为数字代码。 数字代码包括与特定伽马射线的能量对应的唯一存储器位置或通道的地址。 在预选的时间间隔之后,存储器通道共同地包含在期望的能量谱中的每个增量能带的计数。 然后可以由井下CPU询问存储器,以呈现伽马射线发射与能级图。 为了获取时间谱数据,多参数分析器还包括存储器地址发生器。 发生器相对于参考开始时间重复产生对应于相邻时间窗口序列的存储器地址代码的数字序列,由此窗口统一地包含所需频谱的时间间隔。 每次检测到伽马射线脉冲时,此时产生的存储器地址都会对应一个存储单元,并增加驻留在其中的计数值。 在感兴趣的时间间隔结束时,存储器位置可以由CPU询问,并以视觉方式呈现为伽马射线发射计数与时间图。
    • 98. 发明授权
    • Neutron logging time spectral data acquisition system and method
    • 中子测井时间谱数据采集系统及方法
    • US4668863A
    • 1987-05-26
    • US722096
    • 1985-04-10
    • Timothy P. GrayRussel R. RandallMathew G. Schmidt
    • Timothy P. GrayRussel R. RandallMathew G. Schmidt
    • G01V5/10
    • G01V5/101G01V5/102
    • A generalized computer-based system and method for acquisition of nuclear well logging data, including downhole generation of spectral information. A downhole instrument traverses a borehole introducing high energy neutrons into the formation at prescribed depths. Resultant gamma rays are detected and converted into pulses which are amplified and conditioned. For acquiring temporal spectral data, a multi-channel scale section is provided which includes a channel number generator which produces a numerical sequence of memory address codes corresponding to a sequence of adjacent time windows. Each code uniquely defines a start time, whereby the windows collectively comprise the time interval of the desired spectrum. Each time a gamma ray pulse is detected, the memory address generated at that time addresses a corresponding memory location and increments the count value resident therein. At the conclusion of the time spectrum interval of interest, the memory locations may be interrogated by the CPU and the resultant spectral data analyzed, transmitted to the surface, or presented visually as a gamma ray emission count versus time plot.
    • 一种广义的基于计算机的系统和获取核测井数据的方法,包括光谱信息的井下生成。 井下仪器穿过将规定深度的高能中子引入地层的井眼。 检测出所产生的γ射线,并将其转换为经过放大和调理的脉冲。 为了获取时间光谱数据,提供了多通道标度部分,其包括通道数发生器,其产生对应于相邻时间窗口序列的存储器地址代码的数字序列。 每个代码唯一地定义开始时间,由此窗口共同地包含所需频谱的时间间隔。 每次检测到伽马射线脉冲时,此时产生的存储器地址都会对应一个存储单元,并增加驻留在其中的计数值。 在感兴趣的时间谱间隔结束时,存储器位置可以由CPU进行询问,并且所分析的所得到的光谱数据,传输到表面,或者视觉地呈现为伽马射线发射计数与时间图。