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盐穴地下储库的天然气注采性能是衡量储气库效能的重要指标,也是影响储气库稳定性的重要因素。依据实测地层信息建立两种不同形状的储库模型,基于天然气的市场需求规律制定盐穴储气库的注采方案,进行30年的蠕变模拟运行,研究注采方案变化对盐穴体积收缩、塑性区发展及盐穴腔壁位移量的影响。结果表明:形状差异对盐穴腔体性质的影响不明显;体积收缩随着时间的延长而增大,但增大速度逐渐变缓,低压运行期是引起盐穴腔体收缩的主要阶段;紧急采气后的低压运行期会对盐穴腔体产生不利影响,建议对不同盐穴轮流紧急采气以降低单个盐穴腔体紧急采气频率,或者采用在采气结束后立刻跟进注气的方法,保证盐穴的长期有效运行。
The natural gas injection and recovery performance of the underground cavern reservoir is an important index to measure the gas reservoir performance and is also an important factor that affects the stability of the gas reservoir. Based on the measured formation information, two different shape reservoir models were established. Based on the market demand of natural gas, a scheme of injection and production of salt cavern gas reservoir was established, and a 30-year creep simulation was carried out to study the effect of injection- , The development of plastic zone and the displacement of salt cavity wall. The results show that: the shape difference has no obvious effect on the properties of salt cavern cavity; the volume shrinkage increases with time, but the increasing speed gradually slows down, and the low pressure operation period is the main phase causing salt cavern cavity shrinkage; The low pressure operation after gas recovery will adversely affect the salt cavern cavity. It is suggested that the emergency calandria gas take turns to be taken alternately in different salt caverns to reduce the emergency gas production rate in a single salt cavern cavity or gas injection should be followed up immediately after gas production Method to ensure the long-term effective operation of salt caverns.