1 Introduction of Fine Reservoir Description 1.1 Overview 1.2 Fine Reservoir Description of High Water-cut Oilfield 1.3 Fine Reservoir Description of Low-permeability Oilfield 1.4 Fine Reservoir Description of Complex Lithologic Reservoir 2 Characteristics and Contents of Fine Reservoir Description 2.1 Fine Reservoir Description in the Early Development Stage 2.2 Fine Reservoir Description in the Middle--Late Development Stage 3 Methodology of Fine Reservoir Description 3.1 Fine Stratigraphic Classification and Correlation based on High-resolution Sequence Stratigraphy 3.2 Multi-information Fracture Characterization of Volcanic Reservoir 3.3 Reservoir Architecture Characterization based on Sedimentary Microfacies Classification 3.4 Genetic Classification and Quantitative Characterization of Reservoir Pore Structure 3.5 Reservoir Heterogeneity Analysis 3.6 Comprehensive Quantitative Reservoir Evaluation based on Geologic Genesis Analysis 3.7 Reservoir Flow Unit Classification 3.8 Multi-point Geostatistical Modeling 3.9 Remaining Oil Characterization 4 Challenges and Solutions of Fine Reservoir Characterization 4.1 Challenges of Fine Reservoir Characterization 4.2 Solutions of Fine Reservoir Characterization References