井下电磁感应加热器理论分析及实验研究
发布时间：2019-05-10 23:54
【摘要】：稠油开采技术中最典型的方法是注蒸汽热采,传统地面注蒸汽式稠油开采技术热损大、能效低、占地广导致稠油开采综合经济效益低。电磁感应加热技术的诸多优点为利用井下加热器开采稠油提供潜在性。因此,本文对井下电磁感应加热器进行理论分析及实验研究,探索利用井下加热器提升稠油开采技术的可行性。本文针对稠油加热降粘技术需求阐述井下电磁感应加热原理,分析加热磁场分布、励磁线圈和发热元件等因素对井下加热器加热效果的影响,完成井下加热器功率计算推导。结合井下环境,设计长1000mm,直径70mm,流道直径34mm的井下加热器。完成加热器感应线圈材质、螺距、壁厚、绕制半径和高度,发热元件材质、壁厚、半径和长度,隔层材质等内部参数确定。励磁频率为10 kHz时,该加热器理论发热功率为23.04kW。从发热元件和热交换接触面的角度提出加热器功率扩容增效方案。利用多物理场仿真软件COMSOL Multiphysics对加热器进行建模仿真,分析励磁电流、励磁频率对加热磁场、温度场和涡流场分布的影响。仿真结果表明励磁频率为10 kHz时,加热器发热元件内壁温度可达220℃;增加加热器长度可以显著提高加热效果。搭建实验平台对理论计算及加热器结构设计合理性进行验证,实验结果表明所设计的井下电磁感应加热器的实测发热功率可达到20 kW,其电效率在90%左右;加热器105℃的蒸汽产量为163.43kg/h。本论文采用理论、仿真、实验三者相结合的技术手段完成井下电磁感应加热器基础理论分析及实验研究。论文所取得的成果对于井下电磁感应加热器在稠油热采中的工程化应用具有一定的理论支持和技术指导作用。
[Abstract]:The most typical method of heavy oil recovery technology is steam injection thermal recovery. The traditional surface steam injection heavy oil recovery technology has large heat loss and low energy efficiency, which leads to the low comprehensive economic benefit of heavy oil recovery. Many advantages of electromagnetic induction heating technology provide potential for heavy oil recovery with downhole heaters. Therefore, this paper makes theoretical analysis and experimental research on downhole electromagnetic induction heater, and explores the feasibility of using downhole heater to promote heavy oil production technology. According to the technical requirements of heavy oil heating and viscosity reduction, this paper expounds the principle of downhole electromagnetic induction heating, analyzes the influence of heating magnetic field distribution, excitation coil and heating elements on the heating effect of downhole heater, and completes the calculation and derivation of downhole heater power. Combined with the underground environment, a downhole heater with a length of 1000mm, a diameter of 70mm and a diameter of 34mm is designed. Complete heater induction coil material, pitch, wall thickness, winding radius and height, heating element material, wall thickness, radius and length, interlayer material and other internal parameters. When the excitation frequency is 10 kHz, the theoretical heating power of the heater is 23.04 kW. From the point of view of heating element and heat exchange interface, a scheme of capacity expansion and enhancement of heater power is put forward. The multi-physical field simulation software COMSOL Multiphysics is used to model and simulate the heater, and the effects of excitation current and excitation frequency on the distribution of heating magnetic field, temperature field and vortex field are analyzed. The simulation results show that the temperature of the inner wall of the heater heating element can reach 220 鈩，
本文编号：2474097
[Abstract]:The most typical method of heavy oil recovery technology is steam injection thermal recovery. The traditional surface steam injection heavy oil recovery technology has large heat loss and low energy efficiency, which leads to the low comprehensive economic benefit of heavy oil recovery. Many advantages of electromagnetic induction heating technology provide potential for heavy oil recovery with downhole heaters. Therefore, this paper makes theoretical analysis and experimental research on downhole electromagnetic induction heater, and explores the feasibility of using downhole heater to promote heavy oil production technology. According to the technical requirements of heavy oil heating and viscosity reduction, this paper expounds the principle of downhole electromagnetic induction heating, analyzes the influence of heating magnetic field distribution, excitation coil and heating elements on the heating effect of downhole heater, and completes the calculation and derivation of downhole heater power. Combined with the underground environment, a downhole heater with a length of 1000mm, a diameter of 70mm and a diameter of 34mm is designed. Complete heater induction coil material, pitch, wall thickness, winding radius and height, heating element material, wall thickness, radius and length, interlayer material and other internal parameters. When the excitation frequency is 10 kHz, the theoretical heating power of the heater is 23.04 kW. From the point of view of heating element and heat exchange interface, a scheme of capacity expansion and enhancement of heater power is put forward. The multi-physical field simulation software COMSOL Multiphysics is used to model and simulate the heater, and the effects of excitation current and excitation frequency on the distribution of heating magnetic field, temperature field and vortex field are analyzed. The simulation results show that the temperature of the inner wall of the heater heating element can reach 220 鈩，
本文编号：2474097
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