【作者】 牟忠林；

【导师】 肖加奇；

【作者基本信息】 天津大学 ， 信号与信息处理， 2010， 硕士

【摘要】 随着电子技术、计算机技术和信号处理技术的迅猛发展,测井技术也不断更新换代。感应测井是一种通过电磁感应原理来研究地层特性的测井方法。阵列感应测井作为重要的电阻率测井方法,在整个测井事业中发挥着重要的作用。本文首先论述了阵列感应测井基本理论,分析了国内外阵列感应测井的发展现状。几何因子理论是感应测井理论的基础,在综合前人研究的基础上,分析了Doll、Gianzero、Moran和Born等几种常用的几何因子建立的条件及其应用范围。重点介绍了阵列感应测井的信号处理过程,主要研究了信号处理过程中的预处理过程以及信号聚焦的问题。预处理过程中引用了IEEE754标准浮点数表示方法以及离散傅里叶变换方法。信号聚焦过程中,首先介绍了信号聚焦的理论推导过程,设计出了不同探测深度的真聚焦滤波器,大大减少了数据处理的容量。利用Tikhonov正则化方法求解病态的线性方程组,得到了病态方程组的最优解,即初步的真聚焦滤波器。通过硬约束等条件对初步的真聚焦滤波器进行处理,得到了最后的真聚焦滤波器。利用所得到的滤波器即可合成不同探测深度、不同纵向分辨率的测井曲线。更多还原

【Abstract】 With the development of electronic technology, computer technology and information processing technology, many new logging technologies are brought out. Induction logging is a method of using electromagnetic principle to study the formation characteristics. As an important method of resistivity logging, Array induction plays an important role in the whole logging industry.First of all, this paper discusses the basic theory of array induction logging, analyzes the development of domestic and international status of array induction logging. Geometrical factor theory is the theoretical basis of induction logging, on the basis of previous studies, this paper analyzes establishment conditions and applications of Doll, Gianzero, Moran, and Born geometric factors. This paper focuses on signal processing of array induction logging, pre-processing and signal focusing process are mainly studied in this paper. IEEE754 standard floating-point arithmetic and Discrete Fourier Transform are cited in Pre-processing process. In the signal focusing process, introduces the derivation of signal focusing theory, designs filters of different depths, greatly improves the efficiency of the process. The solution is get from the linear equation using Regularization Method. The final filter can be obtained using hard-constraint method. Then True-Resolution Focusing curves that have different vertical resolution and depth of investigation can be composed.更多还原