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盐岩地下储气库腔体以钻井水溶方式开采,溶腔形态可见性差、形态发展可控性难度高,针对畸形溶腔进行科学的稳定性评价是保证其安全运营的重要手段。将变权和相对差异函数理论引入到盐岩溶腔的安全评价中,建立适用于盐穴储气库畸形单腔的稳定性评价模型,首次以溶腔声纳测腔数据为基础,建立三维真实仿真模型并进行数值模拟,将数值模拟结果作为评价指标的评分依据,最后应用该方法对金坛储气库某腔体进行稳定性评价,并针对评价结果提出安全改善措施。研究结果表明,用变权方法对评价指标权重进行处理后得到的结果更加合理,通过将该方法与其他安全评价方法计算结果进行对比,证明了该模型在盐岩储气库畸形溶腔的稳定性评价中具有较好的适用性。
The underground gas storage cavity of salt rock is drilled by water-drilling drilling, the cavity visibility is poor, the controllability of morphology is difficult, and the scientific stability evaluation of the cavity is an important means to ensure its safe operation. The variable weight and relative difference function theory are introduced into the safety evaluation of salt caverns. The stability evaluation model suitable for the single cavern of salt cavern gas storage is established. For the first time, the three-dimensional true The simulation model is simulated and the numerical simulation results are taken as the basis of the evaluation index. Finally, this method is used to evaluate the stability of a cavity in the Jintan gas storage, and the safety improvement measures are put forward according to the evaluation results. The results show that using the variable weight method to deal with the weights of evaluation indexes is more reasonable. By comparing the results with those of other safety evaluation methods, it is proved that the model is stable in the alluvial cavity of salt rock gas storage Sexual evaluation has good applicability.