中文摘要：

目前各油田的递减率计算方法各不相同,相互之间容易混淆,计算结果无法统一对比衡量,而且鲜有针对气藏产量递减率计算方法 的研究。总结归纳了现场应用最广泛的三类气藏产量递减率：年产能递减率、年产量递减率和年对年产量递减率,深入分析它们的含义、区别以及联系,并以Arps递减理论中的双曲递减、指数递减、调和递减和衰竭递减模型为基础,推导了三类产量递减率的数值关系,发现不管哪种递减模型,年产能递减率至少是年产量递减率的1.8倍;在实际生产中,可以求得一个递减率值,再利用换算关系式快速求取另外两个递减率值。以苏里格致密气藏苏5区块某集气站为研究对象,将这三类递减率及其数值关系应用于实际生产数据分析,计算结果 证明了递减率之间数值关系的可靠性,进一步分析各产量递减率的实际意义,可以为气田的产量预测和生产管理提供指导。

英文摘要：

Calculation methods of decline rate are diverse for each single oil field,which are too confusing to be the same index for comparison and analysis ,and the calculation methods of production decline rate in gas reservoir are rarely studied.Three types of production decline rate of the gas reservoir widely used in the field were summed up including yearly productivity decline rate ,yearly production decline rate and year-to- year production decline rate,and their meanings,differences and connections were analyzed deeply.Based on models of the hyperbolic decline,exponential decline,harmonic decline and depletion decline in the Arps de- cline theory,numerical relations of the three decline rates were derived.h found that yearly productivity de- cline rate is 1.8 times of the yearly production decline rate at least whatever the decline rate model is.In the actual production,a decline rate value may be solved,and the other two decline rate values may he solved by conversion formula.Three types of decline rate and their numerical relationship were applied to the analysis of actual production data in certain gas gathering station in Su5 block of Sulige tight gas reservoir. Calculated results proved the numerical relations among the decline rates.Further analysis on the production decline rate may provide guidance for production prediction and management of gas field.