Abstract：Hydraulic fracturing is an important tool to improve the production of stratigraphic oil and gas reservoirs， and is of significance to the exploration and development of oil and gas fields. Hydraulic fractures are the main see-page channels and effective storage space for oil and gas reservoirs， and fracture identification is an important link in exploration and development. Scholars have proposed many practical technical solutions for hydraulic fracture detection by electromagnetic methods. Firstly， this paper classifies and summarizes the main geometric shapes of hydraulic fractures from the perspective of spatial development， and analyzes the advantages and disadvantages of electromagnetic monitoring methods for hydraulic fractures. Based on induction logging theory， new methods and technologies for monitoring and identifying hydraulic fractures filled with conductive proppants by electromagnetic methods are introduced. Secondly， the research status and development trend of hydraulic fractures are reviewed in detail of vertical wells， horizontal wells， and multiple wells. Finally， the main problems and difficulties in electromagnetic detection research on hydraulic fractures are discussed. Currently， the main technical difficulty is that it is hard to master complex fracture morphology， and fracture morphology research is affected by many factors. Thus， multiple electromagnetic simulation methods should be combined for the distribution and characteristics of hydraulic fractures with multi-scale characteristics.
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