从储气库与气藏在开采方式和运行规律方面的差异性出发,考虑气藏型储气库建库评价技术的特殊性和复杂性,提出了储气库特色建库评价关键技术,并进行了矿场应用实例分析。通过总结国内第1批商业储气库建设运行经验,深入研究储气库短期大流量往复注采的内在机理,提出圈闭动态密封性、建库有效孔隙空间、高速不稳定渗流有限供给等理念,创建了圈闭密封性评价、库容参数设计、注采井网优化和监测方案设计4项储气库特色关键技术,分别解决储气库保存条件、容量大小、高效注采、安全运行方面的技术瓶颈,丰富和完善了气藏型储气库建库地质方案设计技术体系。这些技术成功指导了某气藏建库地质方案设计和现场工程实施,扩容达产效果好,实际动态与方案设计指标吻合程度高。图7参16
Due to the significant differences in development modes and operation rules of underground gas storage (UGS) and gas reservoir, the design of UGS construction has its own particularity and complexity. Key evaluation techniques in the process of gas reservoir being converted into underground gas storage were proposed and field application was analyzed. The construction and operation experience of the first batch commercial UGS in China was summarized, the mechanisms of multi-cycle injection and production with large flux in short-term was examined and some concepts were proposed such as the dynamic sealing of traps, the effective pore volume of UGS and the high velocity unstable seepage flow with finite supply. Four key technologies of UGS, i.e., trap sealing evaluation, gas storage parameter design, well pattern optimization and monitoring programs design were created. Preservation condition, storage capacity, effective injection & production and safe operation technology problems of UGS were solved respectively. The geological program design technology system of UGS construction in a gas field was gradually enriched and improved. These technologies have successfully guided geological plan design and implementation of UGS construction in a gas reservoir, the effects of dilatancy and production were great, and the actual dynamic was very consistent with design indicators.
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