The Sound Field of Numerical Simulation in Well When Nn-Cement First Interface and The Second Cement Good

This paper aims to make a systematic research for the conventional density cement well cementation of acoustical wave well logging theory, analyze borehole sound field theory and numerical simulation. Under the condition of known media parameters and borehole parameters, numerical count results show: When the first interface is not cemented, the second interface cement good, if the first interface exists the fluid ring and the thickness of fluid ring is smaller, the rate of casing wave increases as its thickness increasing, when the fluid ring thickness increases to a certain extent, the wave extent would be in a almost unchanged state. The study provides a theoretical basis for oilfield well cementation data interpretation.