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振动激发,不仅会在地下不同介质分界面上产生波动场的反射、折射等现象,同时还能激励产生不同频率的电磁波。本文介绍了自然电位场振动激励效应,也就是研究在野外地质条件下,可控震源振动对自然电位场变化规律的影响。试验资料证实试野外条件下自然电位场振动激励效应客观存在,并通过连续长时间的监测记录,表明振动激励产生的自然电位场效应有三个信息区,即信号变化区、极值稳定区、驰豫恢复区,结合在不同井旁的试验结果,提出信息区异常时间特性与地下介质内流体性质(油、水)密切相关。
Vibration excitation, not only in the underground interface of different media have fluctuations in the field of reflection, refraction and other phenomena, but also stimulate the generation of electromagnetic waves of different frequencies. In this paper, we introduce the natural vibration excitation of potential field, that is to study the influence of vibrator on natural potential field under field geology. The experimental data confirm that the natural electric field vibration excitation effect objectively exists in test field conditions, and through continuous long-term monitoring and recording, it shows that there are three information areas of natural potential field effect caused by vibration excitation, namely, signal change area, extreme stable area, Yu recovery area, combined with the test results at different wells, it is proposed that the abnormal time characteristics in the information area are closely related to the fluid properties in the underground medium (oil and water).