CAJ | 학술논문

受激发极化效应的影响，大地中岩(矿)石电阻率是一个与频率、电化学性质等因素有关的复电阻率。接收到的电磁场信号中，包含了电磁感应效应以及激发极化效应双重因素的影响。将 cole-cole复电阻率模型引入二维线源可控源正演理论，加载伪 delta 函数，实现了含激发极化效应的线源可控源有限元数值模拟。计算了不同极化参数的二维地质体线源可控源的影响特征。结果表明：线源可控源响应对IP效应反映明显，视电阻率出现增高的特征；低阻高极化相对于高阻高极化模型受IP效应影响更大，从低阻中提取 IP 效应更加乐观。该研究为实现从复杂地质条件下CSAMT信号提取IP效应奠定了基础。
수격발겁화효응적영향，대지중암(광)석전조솔시일개여빈솔、전화학성질등인소유관적복전조솔。접수도적전자장신호중，포함료전자감응효응이급격발겁화효응쌍중인소적영향。장 cole-cole복전조솔모형인입이유선원가공원정연이론，가재위 delta 함수，실현료함격발겁화효응적선원가공원유한원수치모의。계산료불동겁화삼수적이유지질체선원가공원적영향특정。결과표명：선원가공원향응대IP효응반영명현，시전조솔출현증고적특정；저조고겁화상대우고조고겁화모형수IP효응영향경대，종저조중제취 IP 효응경가악관。해연구위실현종복잡지질조건하CSAMT신호제취IP효응전정료기출。
Influenced by the induced polarization effect,the resistivity of rock (ore)is a complex resistivity,which related to many factors such as the transmitting frequency,the electrochemical properties,et al.The received electromagnetic signal contains the electromagnetic induction effect and induced polarization effect.In 2-D line controlled source forward modeling theory,we introduced the cole-cole complex resistivity model to study the characteristics of the induced polarization effect. Loading pseudo delta function,we realized the finite element numerical simulation on line controlled source based on cole-cole model.Calculating the response characteristics of the two dimensional geologic body with different polarization parameters. The results show that the IP effect leads to the increasing of apparent resistivity,the influence of low resistance model by the IP effect is bigger than the high resistance model,and extracted IP effect from the low resistance is more optimistic.The research laid a foundation for realizing the extraction of the IP effect in the CSAMT signal.