Criteria for behind the casing flow in operating wells based on the results of spectral analysis of broadband noise metry

Abstract

Goal. Development and development of interpretive criteria for the method of spectral acoustic noise metry.
Methods. Experimental laboratory studies were carried out on the spectral characteristics of acoustic noise generated by flows of liquid and gas-liquid mixture in overflow channels. Based on the results of laboratory studies, changes in the spectral characteristics of acoustic noise observed by downhole equipment in the wellbore were determined depending on the composition of the fluid and the speed characteristics of the flow in the crossflow channel. Interpretive criteria and directions for the development of downhole equipment are proposed to ensure operational monitoring of the current state of the well.
Results. The frequency range of acoustic noise generated by flows of various compositions in the annular space has been established, and interpretive criteria have been determined.
Conclusion. The possibility of increasing the reliability of the conclusion based on the characteristics of behind-the-casing flows by combining the spectral noise metry method with traditional flow metric studies of existing production and injection wells has been shown.