Application Prospect of Magnetic Fluids in Drilling Fluids and Completion Fluids
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摘要: 磁流体是一种智能材料，既具有液体的流动性又具有固体磁性材料的磁性，在汽车、机械、建筑、航空等领域得到了广泛应用，在油气工程中也显示了较好的应用前景。介绍了磁流体及其在油气工程中的应用优势，在调研国内外磁流体在钻井液与完井液应用的基础上，分析了其在智能钻井液、固井水泥浆、压裂液裂缝监测、压裂暂堵转向剂、提高油气单井产量等方面的应用前景，指出了现场应用的关键技术，包括磁流体流变机理、磁流体体系制备与修饰工艺、磁流体性能参数优化和磁流变井下控制装置等。研究结果能为我国油气工程领域应用磁流体提高油气勘探开发效益，降低作业成本提供借鉴和思路。Abstract: Magnetic fluid, a kind of intelligent material, has both the mobility of liquids and the magnetism of solid magnetic materials, and is widely used in auto industry, mechanical engineering, construction field and aerospace industry etc. It also shows good application prospect in oil and gas industry. This paper introduces the advantages of magnetic fluids used in oil and gas industry. Based on the investigation of the application of magnetic fluids in drilling and completion fluids, the application prospects of magnetic fluids in smart drilling fluids, cement slurries, fracture monitoring in fracturing jobs, self-diverting agents in fracturing and temporary plugging, as well as oil and gas production enhancement of a single well. Key technologies in field application are presented in this paper, including rheology of the magnetic fluids, techniques for preparing and modifying magnetic fluids, optimization of the performance of magnetic fluids and equipment for controlling magnetic rheology downhole. The research results will provide reference and ideas for the application of magnetic fluids in oil and gas engineering field to improve the benefits of petroleum exploration and to reduce operating costs.
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表 1 磁流变水泥浆干料性能
干料 D50/
μmρ/
g·cm−3磁饱和度/
emu·cm−3磁化
系数羰基铁粉 8.7 7.80 1706.7 7.9 氢还原铁粉 20.1 7.80 1651.0 6.7 电解铁粉 27.9 7.80 1534.2 6.7 磁性氧化铁 1.9 5.10 433.1 3.0 水泥 23.3 3.14 0.6 1.6×10−3 
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