摘要
随钻电阻率测井仪器响应数值模拟在电法测井仪器研制和资料处理与解释中具有重要的意义.本文利用自适应hp有限元算法(hp-FEM)模拟和分析了地层各向异性以及相对倾斜对仪器接收信号幅值比和相位差的影响,并对仪器响应特性进行了评价;同时,利用HERMES有限元软件包与VC++开发平台相结合,可以对随钻电阻率测井仪器响应数值模拟过程中,仪器产生的感应电场在地层中和地层分界面处的分布进行显示,从而为钻井地质导向提供有效的信息.计算结果表明,自适应hp-FEM算法收敛速度快且计算精度高,非常适合于对随钻电阻率测井仪器响应进行数值模拟计算.
Numerical simulation of resistivity logging-while-drilling（LWD） is important to the electrical well logging instrument design and logging data applications.In this paper,self-adaptive hp-FEM method is used to simulate and analyze the anisotropy of the stratum,and the influence of different dipping angles which can change the amplitude ratio and phase difference of the receive signal from the instrument,the response characteristic is also evaluated.Meanwhile,the finite element analysis software HERMES and VC＋＋ development platform are combined as a tool to reflect the electric field distribution in the stratum and at the boundary,which can provide the effective information in drilling geosteering.Numerical illustration results show that the self-adaptive hp-FEM method has the ability of fast convergence and high computing accuracy.Thus,self-adaptive hp-FEM is an effective method for numerical simulation of electrical logging.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第8期2787-2797,共11页
Chinese Journal of Geophysics
基金
国家自然科学基金(41074099)资助
关键词
随钻电阻率测井
数值模拟
自适应hp有限元
HERMES
幅值比
相位差
Resistivity logging-while-drilling
Numerical simulation
Self-adaptive hp-FEM
HERMES
Amplitude ratio
Phase difference
