【摘要】 天然气成因的准确判别是天然气地球科学理论研究、油气勘探部署与资源潜力评价的基础。自20世纪70年代以来，戴金星院士围绕天然气地球化学基础理论与应用方法，系统构建了一套以稳定同位素、组分组合、轻烃指纹和地质背景协同分析为核心的天然气成因判别体系。基于相关文献与实际应用成果，重点评述了δ¹³C₁-C₁/（C₂+C₃）、δ¹³C₁-δ¹³C₂-δ¹³C₃、■-CO₂、C₇轻烃三角图等典型图版的构建逻辑与技术路径，分析了其在区分油型气、煤成气、生物成因气与无机气，以及识别多源混合气、多期充注系统中的适用性与创新性。研究表明，该判别体系显著推动了中国天然气成因分析方法从单因子向多参数耦合、从定性判读向系统图版识别的转变，不仅在多个含气盆地获得了广泛应用，也在国际天然气地球化学研究中产生了重要影响。天然气成因判别理论体系发展脉络的归纳评述将为天然气地质理论与实践持续提供技术支撑，并为相关成果的学术评价与工程实践转化提供科学依据。更多还原

【Abstract】 Accurate identification of natural gas origin is fundamental to the theoretical research on natural gas geosciences and the exploration deployment and resource potential assessment of oil and gas. Since the 1970s, Academician Dai Jinxing has developed a comprehensive system for natural gas origin determination, grounded in geochemical theory and practice, and based on the integrated analysis of stable isotopic compositions, molecular composition, light hydrocarbon fingerprints, and geological context. This paper systematically reviews the core framework established by him and his team according to related references and application results,focusing on the conceptual design and technical pathways of key diagnostic diagrams such as δ¹³C₁–C₁/（C₂+C₃）, δ¹³C₁–δ¹³C₂–δ¹³C₃,δ¹³C–CO₂ versus CO₂ content, and the C₇ light hydrocarbon triangular plot. We evaluate the applicability and innovation of these tools in distinguishing between oil-type gas, coal-derived gas, biogenic gas, and abiogenic gas, as well as in identifying mixed-source gases and multiphase charging systems. The findings suggest that this identification system has significantly advanced natural gas geochemical interpretation in China, shifting from single-indicator analyses to multi-parameter integration and from qualitative assessments to systematic graphical identification, and has also exerted considerable influence on international research in natural gas geochemistry. The structured overview of the development trajectory of natural gas origin discrimination methodologies provides a technical support for natural gas geological theory and practice and offer a scientific foundation for the academic evaluation and application of related achievements.更多还原