In recent years,spurred by the escalating global demand for energy,shale gas has ignited a worldwide surge in exploration and development,establishing itself as a burgeoning oil and gas resource.Traditional methods of shale gas extraction encounter limitations imposed by the state of gas occurrence and the intricate characteristics of reservoir complexity,posing challenges to efficient extraction.Consequently,the pursuit of a new extraction method holds paramount practical importance for the development of shale gas.Microwave heating,recognized for its efficiency,environmental friendliness,and controllability as a thermal recovery technology,has demonstrated remarkable potential and extensive application prospects,positioning itself as an ideal alternative to conventional thermal recovery methods in shale gas development.This paper furnishes a detailed summary of diverse shale gas extraction methods,critically evaluates the advantages and disadvantages of each,accentuating the developmental potential of microwave heating in the realm of shale gas extraction.Following this,a concise overview is provided of the physical principles and mechanisms governing microwave heating.Building upon this foundation,the paper presents a comprehensive review of numerical simulations and experimental research on microwave heating aimed at enhancing shale gas recovery.The paper elucidates the mechanisms through which microwave heating influences shale gas recovery,encapsulating the impacts of microwave characteristics(such as frequency,power,and heating method)and mineral properties(such as dielectric constant,water content)on shale gas recovery.It also addresses existing research limitations and outlines prospects for the future large-scale application of microwave heating methods.Despite the considerable development potential showcased by microwave heating technology,further theoretical and experimental research is imperative to scale up to field experiments,providing a holistic validation of the feasibility and applicability of microwave heating under actual reservoir conditions.
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