A Method to Characterize the Emulsions in Oil-Water Production Wells Using Multifrequency Dielectric Technique

Emulsions are common in multiphase flow systems,particularly in petroleum and chemical processes, where their type, structure, and stability significantly influence production efficiency and treatment performance. Traditional approaches often fail to capture the dynamic interactions between dispersed droplets and the continuous phase, especially across wide frequency ranges. Therefore, integrating the dielectric technique with visual inspection provides a more comprehensive understanding of emulsion characteristics. The availability of a multifrequency dielectric tool in field operations, combined with the widespread production of emulsions across several wells, underscores the need for reliable downhole emulsion quantification. The primary objective of this work is to develop and demonstrate a comprehensive method for characterizing water-in-oil (W/O) and oil-in-water (O/W) emulsions using multifrequency dielectric analysis in combination with high-resolution microscopic imaging, aiming to identify emulsion types, evaluate their stability, and monitor structural changes over time. The proposed method involves measuring the dielectric properties of emulsions across a wide frequency spectrum from 4 MHz to 3 GHz,focusing on real permittivity and dielectric conductivity profiles. Along with these measurements, high-resolution microscopic images were captured to examine droplet morphology, dispersion quality, coalescence behavior,and interface integrity. This combined approach allows correlation between dielectric responses and emulsion microstructural features. Additionally, real-time dielectric measurements were performed to assess emulsion quality and stability over time. The integration of the dielectric technique with microscopic imaging provides a reliable,noninvasive, and sensitive approach for identifying emulsion type, assessing stability, and tracking emulsion structural evolution. The proposed approach would enhance our understanding of the relationship between dielectric response and emulsion microstructure, thereby offering valuable diagnostic capabilities for laboratory and field applications. Overall, this work introduces a dual-analysis framework that merges broadband dielectric measurements with real-time microscopic visualization,enabling the differentiation of emulsion types and monitoring their stability. Additionally, the results suggest the potential application of this technique as a production logging tool (PLT) for quantifying complex multiphase fluids in reservoirs, especially when conventional PLTs face significant limitations.