The textbook "Fundamentals Of Fractured Reservoirs" offers a comprehensive analysis of the fundamental aspects of reservoir engineering, particularly regarding the description and evaluation of fractured reservoirs. It addresses essential parameters such as fracture density and intensity and explains various data processing methods. Using field examples, it provides a detailed quantitative assessment of physical properties like porosity and permeability of fractures. Additionally, it examines specific rock properties such as capillary pressure and relative permeability in the context of dual-porosity rocks. The book also offers insights into indirect measurement methods for fracturing, supported by various logging results. The five chapters of the book define fundamental physical parameters and describe methods for their evaluation, which are significant for the description of fractured reservoirs.