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| 1 | Gas-water stratified flow patterns from electromagnetic tomography显示文摘Because of gravitational differentiation of multi-phase fluids,gas-water flow is usually stratified in highly inclined or horizontal gas wells.By using electrode arrays to scan flowing fluids, electromagnetic tomography can identify the flow patterns of mixed fluid from the different electrical properties of gas and water.The responses for different gas-water interface locations were calculated and then physical measurements were undertaken.We compared the results of the numerical simulation with the experimental data,and found that the response characteristics were consistent in the circumstances of uniform physical fields and stratified flows.By analyzing the signal characteristics,it is found that,with the change of the interface location,the response curves showed'steps'whose position and width were decided by the location of fluid interface.The measurement accuracy of this method depended on the vertical distance between adjacent electrodes.The results showed that computer simulation can simulate the measurement of the electromagnetic tomography accurately,so the physical experiment can be replaced. | Wang Xiaoxing Wu Xiling | 2009 | Petroleum Science2009，6，3： | 7 |
| 2 | 油井多相流动电磁全息方法研究显示文摘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。 | 张阔 吴锡令 闫景富 蔡家铁 | 2016 | 石油科学通报2016，1，2： | 5 |
| 3 | 油井电磁全息成像精度和分辨率初探显示文摘提出一种成像精度和分辨率探究思路,考察油井内气—水两相流动下的电磁全息测量适用性.以典型的泡状流为研究对象,检验实验测量与数值模拟结果的吻合程度.在不同半径的居中气泡和不同偏心程度的小气泡等极端情况下,利用测量数据进行电磁全息成像,通过占空比考察成像精度和分辨率.结果表明,当气泡居中时,气泡半径不小于管道半径的1/6时方可初步分辨,不小于1/4时方可准确分辨;当气泡半径为管道半径的1/12时,偏心量不小于管道半径的1/2时方可初步分辨,不小于2/3时方可准确分辨.当气泡半径或偏心程度更大时,分辨率将好于上述极端情况. | 张阔 吴锡令 闫景富 蔡家铁 | 2019 | 地球物理学进展2019，34，1： | 3 |
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