天然气储采比是衡量天然气生产规模的关键指标，准确计算天然气储采比对保证天然气合理开 发及制定国家能源战略具有重要意义。通过分析天然气产量增长、稳产和递减3 个不同开发阶段的生产 特征，以产量增长率、可采储量替换率和产量递减率等关系方程为基础，推导出天然气储采比在3 个不同 开发阶段的计算方法。同时，考虑天然气开发过程中可采储量采出程度与储采比之间的关系，又推导出了 采出程度与储采比、储量替换率、产量增长率（或递减率）的关系方程。研究表明，天然气储采比在产量增 长阶段呈大幅下降趋势，至稳产阶段后保持相对稳定，到递减阶段又开始缓慢下降。通过实例分析，论证 了该方法的可靠性和实用性。

Natural gas reserve-production ratio is a key index that describes the relationship between production scale and explored reserves. Accurate calculation of natural gas reserve-production ratio has important guiding significance for ensuring natural gas reasonable development and making national long-term strategy objectives. The production characteristics in the gas production rising stage, stable stage and decline stage were analyzed. Based on the relationship equations of production rising rate, recoverable reserve displacement rate and production decline rate, the calculation methods of natural gas reserve-production ratio in three different development stages were derived. At the same time, considered the relationship between recoverable reserve recovery percentage and reserve-production ratio in natural gas development, the relationship equations between recovery percentage and reserve-production ratio, reserves displacement rate, production rising rate（or production decline rate） were derived. The study result indicates that natural gas reserveproduction ratio shows obvious downtrend in the gas production rising stage, holds relatively stable in stable stage, and begins to descend smoothly in decline stage. The case analysis shows that this new method is reliable and practical for calculating natural gas reserve-production ratio in different development stages.