The development of the hot dry rock is one of the important ways to achieve the goal of "double carbon". In the context of monitoring the hot dry rock reservoir with the electromagnetic method and establishing a scientific and efficient hot dry rock reservoir evaluation system, this paper reviews the basic researches of the rock physical properties related to the electromagnetic hydraulic fracturing monitoring and evaluation, focusing on three aspects, namely, the electrical resistivity characteristics of the rock in the process of fracturing under pressure, the electrical resistivity characteristics of the fractured rock, and the relationship between the rock electrical resistivity and permeability. The application cases of the electromagnetic monitoring in the field of the hot dry rock hydraulic fracturing are introduced. Based on the basic researches of the rock electrical properties, it is concluded that:the pressure fracturing will be accompanied by significant electrical resistivity changes of the rock, and the characteristics of the electrical resistivity changes are closely related to the water saturation in the rock; the number, the width and the roughness of the fractures will affect the electrical resistivity of the rocks, and the influence trend is related to whether the fractures contain the water; the relationship between the electrical resistivity and permeability of specific rocks can be established by modifying the Archie's law and the Kozeny-Carman model. Finally, the tasks faced by the application of the electromagnetic method to the monitoring and the evaluation of the hot dry rock hydraulic fracturing are discussed, including:(1) the study of electrical resistivity properties of the fractured compact rocks under high temperature and high pressure; (2) the relationship model between the permeability and the electrical resistivity of the fractured compact rock under high temperature and high pressure; (3) new theories, new methods, new technologies and new equipment of electromagnetic method detection with higher accuracy, finer resolution, better anti-interference ability and longer detection distance.

hot dry rock  /  electrical resistivity  /  permeability  /  hydraulic fracturing  /  electromagnetic monitoring