钻探交变磁场磁源性能影响因素分析  

作　　者：黄明泉 赵国山 

机构地区：[1]中石化胜利石油工程有限公司随钻测控技术中心,山东东营257064 [2]中石化胜利石油工程有限公司钻井工程技术公司,山东东营257064

出　　处：《科技资讯》2019年第25期1-4,共4页Science & Technology Information

基　　金：国家高技术研究发展计划(863计划)(项目编号:2012AA091601);中国博士后科学基金面上项目(项目编号:2013M541957)

摘　　要：复杂结构井可实现对油气储层的最佳钻遇与保护,随着钻探连通井和双水平井等复杂结构井的数量逐步增多,使得磁性导向系统被引入复杂结构井施工中,其中交变磁场磁源是该系统的重要组成部分,依据电磁学基本理论建立了交变磁场磁源的性能分析物理模型,通过有限元法和实验测试分析验证了该模型的有效性,并对磁源性能影响因素进行了分析。分析结果表明,磁源几何结构和物性参数对磁源性能均存在影响,其中磁源长度和相对磁导率的影响较为规律,线圈匝数、层数和径向尺寸变化体现出最佳结构匹配特性,同时磁源外磁场强度随着中心距离的增大而减少,磁源外磁场强度与距离的三次方成反比关系。The complex structure wells successfully improved the drilling meeting efficiency and obtained obvious economical, social, and environmental protection benefits. With the quantity gradually increased of complex structure wells, such as interconnecting wells, and dual horizontal wells, etc., the magnetic guidance system and tools was introduced to meet the increasing accuracy requirements of the well trajectory control. Magnetic source is an important part of this system. Performance analysis model of magnetic source was established based on the electromagnetism theory. Using the finite element method and Experimental test verifies the validity of this model. Performance-influencing factors of magnetic source were analyzed. The results are shown that magnetic source performance mainly depends on the structure dimension and material physical parameters. The length and relative permeability has regularity influence on magnetic source performance. The coil layer number and core diameter has optimal match. The results show that increasing distance lead to decreasing the magnetic field strength. The magnetic field strength is inverse proportion to the cube of distance.

关 键 词：磁源 磁场强度 有限元法 物性参数 结构尺寸 中心距离 

分 类 号：TE243[石油与天然气工程—油气井工程] TE927