盐穴天然气地下储气库腔群优化配产模型

根据盐穴储气库注采运行特性,将储气库多腔注采运行考虑为一个系统,在满足城市调峰需求、溶腔注采井筒不被天然气冲蚀和溶腔最低运行压力3种约束限定条件下,以腔群总压降最小为优化目标,提出了盐穴储气库腔群配产模型,基于有约束条件的复形调优法对模型进行了求解,确定出库内各单腔的最佳采出量.模拟结果表明优化配产后各溶腔压降明显低于均产,优化配产后溶腔总压降低于等量配产0.717 MPa.对于大容积采气能力高的溶腔,可实现大流量的采气,研究成果可应用于盐穴储气库注采运行方案的确定及多腔优化生产调度.

Multi-Cavity Optimal Dispatch Model of Salt-Cave Underground Gas Storage

Based on the operation characters of salt-cave underground gas storage, the injecting and withdrawal circulations of multi salt cavern natural gas underground storage was described as a system. On the conditions of meeting the city peak demand, caverns of natural gas injection well wichout washing and caverns minimum operating pressure constraints, the multi-cavity optimized dispatch withdrawal models were built with the goal of single cave pressure drop minimum. Based on the replica optimization method, the models were solved, and the optimum withdrawal was calculated in each salt-cave. The results show that each cave pressure drop in optial dispatch withdrawal condition is obviously lower than that in average withdrawal condition, which is 0. 717 Mpa. The research results can be used in the operation programs determining and the production scheduling of multi salt cavern natural gas underground storage.