论文部分内容阅读
使用光谱折射模型,分析了水平井储层模型媒质的复介电系数和岩性特征。数值模拟和分析了纳秒、亚纳秒电磁脉冲在储层模型中的传播过程。用振荡天线发射宽度0.3纳秒到3.0纳秒的超宽带电磁脉冲,在地质雷达收发器120分贝动态范围内,确定了油水界面的最大探测深度是从0.8米到1.2米。根据测出的油水界面超宽带反射脉冲的延迟时间、油水界面反射后发射脉冲和接收脉冲的平均频率,确定出发射器到油水界面的距离。
Using the spectral refraction model, the complex dielectric permittivity and lithology characteristics of horizontal well model media are analyzed. Numerical simulation and analysis of nanosecond, sub-nanosecond electromagnetic pulse propagation in the reservoir model. Using the oscillating antenna to emit ultra-wideband electromagnetic pulses with a width of 0.3 nanoseconds to 3.0 nanoseconds, the maximum detection depth of the oil-water interface is determined to be from 0.8 meters to 1.2 meters within the dynamic range of 120 dB of the GPR transceiver. The distance between the emitter and the oil-water interface is determined according to the measured delay time of the ultra-wideband reflection pulse at the oil-water interface, the average frequency of the transmitted pulse and the received pulse after reflection at the oil-water interface.