季节调峰型地下储气库注采规模设计——以川渝气区相国寺地下储气库项目设计为例

Injection and production scale design for seasonal-peak-shaving underground gas storage:A case study of Xiangguosi UGS in the eastern Sichuan Basin

注采规模决定了地下储气库井口数量、井口油套管尺寸的设计和地面集输系统的设计规模,注采规模的计算是季节调峰型地下储气库工程设计的关键。为此,以川渝气区相国寺地下储气库工程为例,制订了季节调峰型地下储气库注采规模的设计流程,阐述了消费系数法在天然气市场需求量预测中的应用,分析了天然气的需求结构及月不均匀系数对注采规模设计的影响,提出了季节调峰型地下储气库调峰需求总量及注采规模的计算方法,为其他类型储气库注采规模的设计提供了参考。

The scale of injection and production determines the well number,tubing and casing size,and ground surface gathering and transportation system of an underground gas storage.The calculation of injection and production scale is critical in the design of seasonal-peak-shaving underground gas storage(UGS).Taking the Xiangguosi UGS in the eastern Sichuan Basin as a case study,this paper establishes the design procedures for the injection and production scale of seasonal-peak-shaving UGS,describes how to use the consumption coefficient method to predict the market demand for natural gas,and analyses the demand structure of gas and the influence of monthly imbalance factor.Besides,it proposes methods and procedures to calculate the injection and production scale of a seasonal-peak-shaving UGS,providing reference for such design of other similar UGS in China.