摘要
本文在圆柱坐标系中,用传输线矩阵法对电磁测井问题进行了时域计算.计算中采用横向三层油井模型,即井筒层、渗透层和真地层,并考虑上下围岩的影响.井筒层参数为σ=0.5、ε_r=80;渗透层σ=0.1、ε_r=20;真地层σ=0.025、ε_r=5,上下围岩σ=0.2、ε_y=30,收发点相距0.3m,计算电场 z 分量的时域响应.并讨论了当收发天线间的距离增大,去除围岩效应和真地层的电参数发生变化时的波形变化情况,证明了电磁测井仪器的可行性.
In this paper,the formulas of the TLM method in cylindrical coordinates are given,
and have been used in the calculation of the clectromagnetic propagation logging.The oil
well model is made up of pit shaft,permeable strata and earth steata and the influence of
surrounding rock is considered as well.The electrical parameters are σ=0.5,ε_r=80;σ=0.1
ε_r=20;σ=0.025,ε_r=5 and σ=0.2,ε_r=30respectively.The distance between transmis-
sion and receiving is 0.3m,and the z componcnt of electrical field has been calculated in
time domain.When the distance increases,surrounding rock does not exist or the electrical
data of the earth strata change,the response changes also.And the instrument of EM log-
ging has proved feasible.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1990年第2期9-16,48,共9页
Journal of Xi'an Jiaotong University
基金
中国海洋石油测井公司的资助
关键词
油井测量
电测井
时间序列分析
producing well
eletrolog
electromagnetic radiation
time series anlalysis
numerical calculation
