Study On Analysis And Processing Of Array Induction Logging Signal

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.