小井间距双井水溶造腔模型试验研究

发布时间：2018-03-11 13:41

本文选题：盐岩　切入点：地下储库　出处：《地下空间与工程学报》2017年S1期 　论文类型：期刊论文

【摘要】：以湖北云应盐矿水溶造腔现场先导试验为背景,在室内开展了小井间距双井水溶造腔模型试验研究,并压制出一种可用于模拟水溶造腔的大尺寸型盐。基于相似理论中的量纲分析法,建立了现场造腔与模型试验的相似比关系。研究结果表明:卤水平均浓度随造腔时间的增加而增大,并最终达到一个稳定的状态;在造腔速率上,试验1的提管方式要优于试验2,说明提进水管的方式更适合小井间距双井水溶造腔;试验1形成的腔体形状为"台阶状",可通过增加提管的次数来消除边界的不规则,小井间距双井水溶造腔的提管次数可借鉴单井水溶法,以8~10次较为合适,试验2形成的腔体形状为"宝塔状",此形状在空间利用上较差;小井间距双井水溶造腔形成的溶腔横截面为非对称的椭圆形,两组试验溶腔横截面的长短轴之比分别为1.44和1.17。
[Abstract]:Based on the field pilot test of water dissolution cavity in Yunying Salt Mine, Hubei Province, the model test of water dissolution cavity in two wells with small well spacing was carried out in the laboratory. A kind of large size salt which can be used to simulate the water solution cavity is produced. Based on the dimensional analysis method in the similarity theory, The similarity ratio between in-situ cavity making and model test is established. The results show that the average concentration of brine increases with the increase of cavity making time and finally reaches a stable state. The way of lifting pipe in experiment 1 is better than that in experiment 2, which shows that the way of lifting inlet pipe is more suitable for water dissolution cavity with small well spacing in double wells, and that the cavity formed in experiment 1 is "step shaped", which can eliminate the irregular boundary by increasing the number of lifting pipes. The number of pipe lifting of water dissolution cavity in two wells with spacing between small wells can be used for reference in single well water solution method. The 8 ~ 10 times is more suitable, and the shape of the cavity formed in experiment 2 is "pagoda", which is poor in space utilization. The cross section of the cavity formed by water dissolution cavity with small well spacing is an asymmetric ellipse. The ratio of the long and short axis of the cross section of the two experimental cavities is 1.44 and 1.17 respectively.
【作者单位】：重庆大学煤矿灾害动力学与控制国家重点实验室;江苏油田分公司石油工程技术研究院;
【基金】：国家自然科学基金(51574048,51304256)
【分类号】：TE822

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