地下水封洞库预选场地的地质适宜性评价

Geological Adaptability Evaluation for Preselected Site of Underground Water-sealed Rock Caverns

科学合理地选择建设场地是油气能源的水封式地下储存建设中面对的首要问题,其中场地的地质适宜性评价极为关键。通过总结参与的数个地下水封洞库工程实践经验,并分析其它洞库成功经验和失败教训,从储能原理出发提出预选场地的地质适宜性定量评价模型。在建模过程中,首先阐述了场地地质适宜性评价目标和评价指标选取原则;其次从区域稳定性条件、岩体稳定性条件和水压力密封条件3方面建立起含9项二级指标的评价体系;再基于评分法对二级指标进行评分赋值,基于模糊层次分析法得出一级指标权重;最后结合乘积式和加权求和式构建评价模型,并通过Visual Basic平台编程实现。以山东黄岛地下水封石油洞库为例,对评价模型进行应用和检验,结果表明评价模型中的指标可从预可行性研究阶段获取,可行性和可靠性较高,可为相关工程提供依据和参考。

Site selection is a primary issue in the construction of underground water-sealed caverns for storaging en- ergy resources, and in particular, the evaluation of site＇ s geological adaptability is crucial. In this paper, a quanti- tative evaluation model for the geological adaptability of preselected sites is presented according to the energy water- sealed principle. Experiences and lessons from several underground water-sealed caverns were taken as reference. The principles of selecting evaluation objectives and indexes were expounded at first; subsequently, an evaluation system consisting of 9 secondary indexes in terms of regional stability, rock mass stability and sealing of water pres- sure was established; then each secondary index was scored by the method of point rating, and the weight of each first-grade index was determined through fuzzy analytic hierarchy process; finally, the evaluation model was built by combining product of related secondary indexes and weighted sum of the first grade indexes, and the evaluation model was programmed through Visual Basic software platform. To verify the evaluation model, an underground wa- ter-sealed oil storage cavern in Huangdao, Shandong province was taken as an example. The results show that the model has high feasibility and reliability. It is in accordance with the data of preliminary feasibility study and could be referenced for related projects.