Abstract Pioneering testing procedures and a well-defined laboratory setup enabled studying the application of acoustic emission (AE) techniques in characterizing multiphase flows within intelligent completions. The study provided a comprehensive understanding of the testing methodologies and experimental conditions required for successful implementation. Amongst other applications of acoustic sensing in both upstream and downstream oil and gas, the focus in this laboratory study was to assess the feasibility of passive acoustic techniques in real-time detection of flow-induced noise (FIN) within downhole completions, specifically targeting Venturi throat and inflow control devices (ICDs). The scope encompassed evaluation of single-phase flows (water and oil) and two-phase flows (oil-gas and oil-water) at different flow rates with azimuthal recording around the flow restriction. The laboratory study involved a series of flow loop tests simulating multiphase flows in downhole completion equipment. Miniature AE sensors (hydrophones) were strategically placed near flow restrictions, capturing FIN. The encountered challenges with implementation for such a complex testing setup required innovative and engineered solutions. The acoustic signals’ energy was then correlated with changes in fluid flow properties. The testing procedures utilized a customized setup with acoustic sensors to obtain optimal sensor placement for effective monitoring. Test results indicated successful study of correlations between the total flow rate, water cut, and free gas cut with the energy and spectral characteristics of the acquired FIN acoustic signal. The laboratory setup, equipped with miniature hydrophones and a signal conditioner, facilitated the acquisition of accurate acoustic signals. Observations point to the potential of using FIN for early detection of water and gas breakthrough, enhancing real-time production monitoring capabilities. The testing procedures demonstrated the feasibility of employing an acoustic-based permanent downhole flow monitoring system. This work contributes novel insights into AE techniques, particularly in the context of intelligent completions. The innovative laboratory setup offers a pioneering approach to assessing flow-induced noise. The insights gained from the laboratory testing contribute to the existing body of literature and offer practical guidance to practicing engineers for efficient and accurate acoustic-based flow monitoring in the petroleum industry.
Zeghlache et al. (Tue,) studied this question.
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