6. Types and Characteristics of Oil and Gas Reservoirs

The chapter delves into the diverse types and characteristics of oil and gas reservoirs found worldwide, highlighting the significance of understanding their formation and distribution for effective exploration. It begins by discussing the general introduction to oil and gas reservoir classification, emphasizing the importance of various classification schemes based on trap formation, morphology, and other factors. The text explores different types of reservoirs, including structural, stratigraphic, lithologic, and composite reservoirs, each with its unique characteristics and formation mechanisms. It also covers unconventional oil and gas reservoirs, such as tight sandstone, shale oil and gas, and coalbed methane, which have different accumulation mechanisms compared to conventional reservoirs. The chapter provides detailed examples of various reservoir types from different regions, illustrating the complexity and diversity of oil and gas reservoirs. It concludes by discussing the basis and classification scheme of oil and gas reservoirs, emphasizing the importance of scientific and practical principles in reservoir classification. This comprehensive overview offers valuable insights into the formation and distribution of oil and gas reservoirs, aiding professionals in their exploration and development efforts.