过套管电阻率测井数据处理方法的研究 答辩ppt课件

1、指点教师：张家田指点教师：张家田 教授教授 过套管电阻率测井数据处置方法研讨过套管电阻率测井数据处置方法研讨报告人：黄淼子内容安排内容安排1. 开题根据开题根据2. 研讨内容研讨内容 技术道路技术道路 创新点创新点 3. 拟提交最终成果拟提交最终成果1.1 国内外现状国内外现状 1.2 目的及意义目的及意义2.1 研讨内容研讨内容 2.2 技术道路技术道路 2.4 创新点创新点 3 论文论文 实验实验1.1 国内外现状国内外现状1.2 目的及意义目的及意义1.2 目的及意义目的及意义过套管电阻率测井实践丈量信号量级 2.1 研讨内容研讨内容1 研讨过套管电阻率测井的丈量算法2 呼应信号数据处置

2、方法3 数据处置的噪声抑制方法ThemeGallery is a Design Digital Content & Contents mall developed by Guild Design Inc.2.2 技术道路技术道路2.2 技术道路技术道路2.2 技术道路技术道路技术道路技术道路)()()()()()()(4322222221212121211121AAANANAAMMAAAMMAnIUkIUIUkIUIIUIUIIUIUMM2.2 技术道路技术道路2.2 呼应信号数据处置方法呼应信号数据处置方法2222)cos()sin(QPAAA10)cos()s(2sinNnnnNA

3、P10)sin()s(2cosNnnnNAQ2.2 数据处置的噪声抑制方法数据处置的噪声抑制方法 限幅滤波法又称程序判别滤波法限幅滤波法又称程序判别滤波法 方法：根据阅历判别，确定两次采样允许的最大偏向值方法：根据阅历判别，确定两次采样允许的最大偏向值设为设为A每次检测到新值时判别：假设本次值与上次值每次检测到新值时判别：假设本次值与上次值之差之差A,那么本次值无效那么本次值无效,放弃本次值放弃本次值,用上次值替代本次值。用上次值替代本次值。 优点是能有效抑制因偶尔要素引起的脉冲干扰。优点是能有效抑制因偶尔要素引起的脉冲干扰。 缺陷是无法抑制那种周期性的干扰平滑度差。缺陷是无法抑制那种周期性的

4、干扰平滑度差。 中位值滤波法中位值滤波法 方法：延续采样方法：延续采样N次次N取奇数把取奇数把N次采样值按大小陈次采样值按大小陈列取中间值为本次有效值列取中间值为本次有效值 优点是能有效抑制因偶尔要素引起的动摇干扰，对温度、优点是能有效抑制因偶尔要素引起的动摇干扰，对温度、液位的变化缓慢的被测参数有良好的滤波效果。液位的变化缓慢的被测参数有良好的滤波效果。 缺陷是对流量、速度等快速变化的参数不宜。缺陷是对流量、速度等快速变化的参数不宜。2.2 数据处置的噪声抑制方法数据处置的噪声抑制方法 算术平均滤波法算术平均滤波法方法：延续取方法：延续取N个采样值进展算术平均运算。个采样值进展算术平均运算。

5、N值较大时信号平滑度值较大时信号平滑度较高，但灵敏度较低；较高，但灵敏度较低；N值较小时信号平滑度较低，但灵敏度较高。值较小时信号平滑度较低，但灵敏度较高。 优点是适用于对普通具有随机干扰的信号进展滤波，这样信号的特优点是适用于对普通具有随机干扰的信号进展滤波，这样信号的特点是有一个平均值，信号在某一数值范围附近上下动摇。点是有一个平均值，信号在某一数值范围附近上下动摇。缺陷是对于丈量速度较慢或要求数据计算速度较快的实时控制不适缺陷是对于丈量速度较慢或要求数据计算速度较快的实时控制不适用，比较浪费用，比较浪费RAM。消抖滤波法消抖滤波法方法：设置一个滤波计数器，将每次采样值与当前有效值比较。假

6、方法：设置一个滤波计数器，将每次采样值与当前有效值比较。假设采样值等于当前有效值，那么计数器清零；假设采样值小于或大设采样值等于当前有效值，那么计数器清零；假设采样值小于或大于当前有效值，那么计数器加于当前有效值，那么计数器加1，并判别计数器能否大于等于上限，并判别计数器能否大于等于上限N(溢出溢出)。假设计数器溢出。假设计数器溢出,那么将本次值交换当前有效值那么将本次值交换当前有效值,并清计数并清计数器。器。优点是对于变化缓慢的被测参数有较好的滤波效果优点是对于变化缓慢的被测参数有较好的滤波效果,可防止在临界值可防止在临界值附近控制器的反复开附近控制器的反复开/关跳动或显示器上数值抖动。关跳

7、动或显示器上数值抖动。缺陷是对于快速变化的参数不宜，假设在计数器溢出的那一次采样缺陷是对于快速变化的参数不宜，假设在计数器溢出的那一次采样到的值恰好是干扰值到的值恰好是干扰值,那么会将干扰值当作有效值导入系统。那么会将干扰值当作有效值导入系统。2.3 创新点创新点 (1) 设计在鼓励信号的频率为0.1Hz的条件下过套管电阻率测井方法呼应信号的数据处置方法； (2) 数据处置过程中的噪声抑制方法。 3 论文完成拟提交最终成果论文完成拟提交最终成果 1. 完成基于ADSP-BF533DSP数据采集系统的设计与调试任务； 2. 公开发表相关论文两篇以上； 3. 撰写毕业论文。DiagramTheme

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