Application of Acoustic Variable Density Logging in Cementing Quality Evaluation
With the diversified development of casing well logging technology,acoustic variable density logging mainly uses acoustic amplitude logging and acoustic variable density logging to monitor oil field cementing quality.Through the in-depth study of acoustic wave theory and the analysis of the relationship between acoustic wave information and rock parameters,the application technology of acoustic variable density logging in cementing quality evaluation has been developed in combination with digital logging technology and logging data processing.Acoustic variable density logging can not only evaluate the VDL image through the curve of sound amplitude and bond index(BI value),but also evaluate the bond between casing and cement.It can reflect the binding state of the first interface and provide binding information about the second interface.Firstly,the instrument selection of VDL in cementing quality evaluation was described,the principle and instrument technology of VDL were analyzed,and then some typical case data of VDL were analyzed.According to the factors affecting cementing quality logging,the judgment and solution of various interference factors were put forward,and the different cementing quality was evaluated and explained.Finally,the comprehensive utilization value of the data was improved,and people's understanding of the technology of acoustic variable density cement bond logging can be enhanced.
acoustic variable density loggingcementing quality evaluationcement bond logginglog interpretation
NETL
NSTL
万方数据
