Simulation of Vector Electric Dipole Source Response in Homogeneous Earth for Petrochemical Resource Exploration

Extensive observation examples have verified that the processes of earthquake development and occurrence are accompanied by seismic electromagnetic anomalies. Some of the electromagnetic emission phenomena, such as seismo-electromagnetic signals, electro-kinetic emission near the water driven front in oil reservoirs and low frequency leaking signals from deep based protective engineering, can be treated as the low frequency vector electric dipole source underground. In this study, the equivalent electric dipole generated by the seismic electromagnetic anomaly in a homogeneous Earth was numerically simulated, focusing on the spatial distribution characteristics of the electric dipole source response in any direction in the Earth. By simulating the dipole source responses for different sources and geoelectric parameters, the distribution characteristics of the electric dipole source response in the Earth was analyzed and discussed. The results of this analysis provide a basis for the observation, identification, processing, and interpretation of seismic electromagnetic signals. Information about seismo-electromagnetic source distribution and time variation can be used for evaluating possible earthquake hazard as well as to study the machanism and time evolution patterns of seismogenic process.