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盐穴储气库完腔后无法继续使用柴油阻溶剂对不规则腔体进行回溶造腔,因此迫切需要发展天然气阻溶回溶造腔技术。研究了该技术的工艺流程、工艺参数、造腔模拟技术,并在西气东输金坛储气库开展现场试验,效果超出预期:A腔体增加自由体积14 000 m3,腔体上部突出的岩脊发生自然垮塌,排除了后期注气排卤过程中盐层垮塌砸坏排卤管柱的风险。该试验为国内首次腔体扩容及修复试验,对今后盐穴储气库建腔技术的推广及削减造腔成本具有重要的工程指导意义。
After the cavity of the salt cavern gas storage can not continue using the diesel oil resistance solvent to dissolve the irregular cavity back into the cavity, it is urgent to develop the gas dissolving and dissolving cavity technology. The technological process, process parameters and cavity modeling technology of the technology were studied. Field experiments were carried out in the Jintan gas storage project of the West-East Gas Pipeline. The results were beyond the expectation: the free volume of A cavity was increased to 14 000 m3, the upper part of the cavity was prominent Natural collapse of the rock ridges ruled out the risk of collapsing the brine column in the course of gas injection and drainage during the later period. This experiment is the first chamber expansion and repair test in China, which has important engineering significance for popularization of cavity construction and reduction of cavity cost in salt cavern gas storage in the future.