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鉴于油井生产过程中流体分布的复杂性和流动变化的随机性,正在兴起的多相流动测量与成像研究遇到严重挑战,尤其是敏感场构建、多模信息融合和流动图像重建等关键技术亟待突破。电磁全患方法旨在根据探测物理场特性,基于成像测量理论,研究建立全新的双模敏感场,对传感器采集信号的实部和虚部信息进行融合,探索高效适用的全息成像方法,并通过模拟流动测量实验检验全息成像可行性和精确度。研究表明,全息测量数据特征区别明显,能够充分突出各相流体导电特性与介电特性的差异;全息测量敏感场相比原有敏感场更加适用于油井多相流动电磁全息方法;基于双模融合的全息成像方法有益于提高全息成像精度。流动模拟测量检验结果表明,油井多相流动电磁全息方法是可行的,具有良好的应用前景。
Due to the complexity of fluid distribution and the randomness of flow changes during oil well production, there are serious challenges in the research of multiphase flow measurement and imaging. Especially the key technologies such as sensitive field construction, multimode information fusion and flow image reconstruction breakthrough. Based on the characteristics of sounding physical field and based on the imaging measurement theory, the electromagnetic all-weather method aims to establish a new dual-mode sensitive field and fuse the real and imaginary parts of the signal collected by the sensor to explore an efficient and applicable holographic imaging method. Simulated flow measurement experiment to test the feasibility and accuracy of holographic imaging. The results show that the distinguishing characteristics of the holographic data are obvious, which can fully highlight the differences between the conductive properties and the dielectric properties of the fluids. The holographic sensitive field is more suitable than the original sensitive field for the oil well multiphase flow electromagnetic holography method. The holographic imaging method is helpful to improve the accuracy of holographic imaging. Flow simulation test results show that oil well multiphase flow electromagnetic holography method is feasible and has good application prospects.