【作者】 范存；

【导师】 李士斌； 杨智光；

【作者基本信息】 东北石油大学 ， 石油与天然气工程， 2010， 硕士

【摘要】 随着世界石油工业的不断发展,大斜度井、分支井和水平井等钻井技术越来越多地被用来开发规模更小、油层更薄、物性更差、非均质性强的油藏。随钻测井(LWD)由于自身的特点,更多地被用于这些油藏的评价和地质导向钻井应用工作中。其中,随钻测井中的电磁波测井是电法测井中的一种,在石油勘查中具有重要地位。本课题研究了随钻电磁波电阻率测量短节,这对随钻测量仪器的发展具有重要的意义。本文利用解析方法中的并矢Green函数法对随钻电磁波传播电导率测井响应进行了具体研究,包括理论算法推导、测井响应规律及均质地层图板解释。推导出了层状各向异性介质中的并矢Green函数G ME( r , r ’)和G MH( r , r ’),介绍了如何利用递推算法来确定Sommerfeld积分待定系数的线性方程组。分析了随钻电磁波测井的纵向分辨率及探测深度的影响因素。利用并矢Green函数法,模拟得到了均匀介质地层中幅度比电导率σA、相位差电导率σφ和地层的关系图板。本文给出了随钻电阻率天线壳体结构设计。详细的研究了电源电路、发射电路、接收电路、调制解调电路和主控电路,并做出了电路板。对电路板和电阻率短节进行了严格的地面检测。随钻电阻率短节结合MWD和伽玛组成了LWD,完钻了1口水平井。更多还原

【Abstract】 With the development of worldwide petroleum industry, deviated holes, branch holes and horizontal wells are used to exploit oil reservoir which is smaller, thinner and worse. Logging while drilling (LWD) is used to evaluate and Geo-steering drill in this kind of reservoir because of its characters. Being an important method of electrical logging, electromagnetic wave logging is widely used in petroleum exploration. Researching on electromagnetic propagate resistivity while drilling has an important significance to development of LWD instrument.In the paper, the response of electromagnetic propagate resistivity logging while drilling was researched using dyadic Green’s function, including theoretical algorithm derivation, logging response and explaining isotropic formation plate. The dyadic Green’s G ME( r , r ’) and G MH( r , r ’) in layered anisotropic formation was developed. How to determine the Sommerfeld integral determined coefficient of equation group by recursive algorithm was deduced particularly. The impact factors of vertical resolution and detection of electromagnetic wave logging while drilling was analyzed. Using dyadic Green’s function, the relationship between phase difference conductivityσφ,amplitude ratio conductivityσA and anisotropic are simulated in homogeneous medium formation and the conductivity in layered formation are also explained.Design of antenna’s structure was introduced in the paper. Power circuit, transmitter circuit, receiver circuit, modem circuit and master control circuit were particularly studied, and all relevant PCB were manufactured. All PCB and resistivity sub were strictly tested on ground. LWD composed of resistivity sub, MWD and gamma. A horizontal well was drilled with the LWD.更多还原