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[1]王建夫,金作良,李剑光,等.盐穴储库水平对接井造腔物理模拟实验[J].油气储运,2024,43(08):1-14.
　WANG Jianfu,JIN Zuoliang,LI Jianguang,et al.Horizontal leaching characteristics studied by experiment for salt-cavern storage[J].Oil & Gas Storage and Transportation,2024,43(08):1-14.

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盐穴储库水平对接井造腔物理模拟实验

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年08期页码: 1-14 栏目: 出版日期: 2024-08-25

Title:: Horizontal leaching characteristics studied by experiment for salt-cavern storage

作者:: 王建夫; 金作良; 李剑光; 贾建超; 朱阔远; 周照恒

Author(s):: WANG Jianfu; JIN Zuoliang; LI Jianguang; JIA Jianchao; ZHU Kuoyuan; ZHOU Zhaoheng

关键词:: 盐穴储库; 对接井造腔; 地层倾角; 循环方式; 垫层控制; 腔体形态; 排卤浓度

Keywords:: Salt-cavern storage; docking well leching; formation dip angle; circulation mode; cushion control; cavern shape; brine concentration

分类号:: TE822

文献标志码:: A

摘要:: 【目的】目前盐化企业多采用水平对接井采卤造腔方式，由于不添加阻溶剂垫层，造腔形态难以控制。而盐穴储库常用的垫层阻溶技术可以较好控制腔体形态，但该技术尚未应用于对接井造腔，因此垫层阻溶方式对对接井造腔腔体形态及排卤浓度的影响规律尚不明确，无法有效指导现场技术应用。【方法】基于现有盐企采卤方式特点及存在的问题，提出采用垫层阻溶双井交替注水、分阶段上提造腔管柱与垫层的新对接井造腔方式。基于相似理论搭建实验平台，开展新方式下的对接井造腔物理模拟实验，采用江苏淮安盐矿某一对接井现场实际数据验证了实验模型的准确性，随后分析了地层倾角、排量、垫层及管柱控制控制、注水循环方式对腔体形状及排卤质量浓度的影响。【结果】采用垫层阻溶的水平对接井造腔腔体形态呈U形，腔体体积大，排卤浓度高，相对于单直井具有显著优势；地层倾角的存在会增加水平通道高度，降低直井注水时的排卤质量浓度；大排量会提高腔体体积，增大水平通道及两侧腔体尺寸；垫层控制对腔体形状影响较大，长期停留在同一位置，易出现平顶状畸形，而管柱控制对腔体形状影响较小；存在地层倾角时，注水循环方式会显著影响腔体形态及排卤质量浓度。【结论】采用垫层阻溶技术的水平对接井造腔是一种高效的造腔方式，具有腔体形状可控，排卤浓度高等优点，可作为未来盐穴储库造腔技术主要发展方向，但受限于室内研究局限性，应加强现场试验研究。

Abstract:: [Objective]Horizontal docking well leaching is an efficient method for constructing salt caverns, and using cushion layer to resist dissolution can effectively control the cavern shape. However, this leaching method has not been applied to docking wells, and its impact on cavern shape and brine concentration is not yet clear, which cannot effectively guide on-site technical applications. On the basis of the existing brine extraction methods of salt enterprises, a method of alternating water injection well with a cushion layer to resist dissolution is proposed, which involves left leaching columns and the cushion layers. [Methods]Based on the similarity theory, an experimental platform was built and a new physical simulation experiment was carried out. The accuracy of the experimental model was first verified with field example, and then the influence of formation inclination angle, injection rate, cushion layer and pipe control, and circulation mode on the cavern shape and the brine concentration was studied. [Results]The results show that ① the cavern shape of the horizontal docking well is U-shaped, with a large volume and high brine concentration, which has significant advantages compared to a single vertical well; ② The existence of formation dip angle will increase the height of the horizontal channel and reduce the brine concentration of during vertical well water injection; ③ A large injection rate will increase the volume of the cavern, increase the size of the horizontal channel and both sides of the cavern; ④ Cushion control has a significant impact on the cavern shape, and staying in the same position for a long time can easily lead to flat top deformities, while column control has a relatively small impact on the cavern shape; ⑤ When there is a formation dip angle, the circulation mode will significantly affect the shape of the cavern and the brine concentration. [Conclusion]The conclusion is that Horizontal docking well leaching is an efficient salt cavern construction method, with the advantages of controllable shape and high brine concentration. It can be the main leaching development direction in the future. However, due to the limitations of indoor research, on-site experimental research should be carried out.

相似文献/References:

[1]王建夫,金作良,李剑光,等.盐穴储库水平对接井造腔物理模拟实验[J].油气储运,2024,43(08):926.[doi:10.6047/j.issn.1000-8241.2024.08.009]
　WANG Jianfu,JIN Zuoliang,LI Jianguang,et al.Physical simulation experiment on horizontal docking well leaching for salt cavern storage[J].Oil & Gas Storage and Transportation,2024,43(08):926.[doi:10.6047/j.issn.1000-8241.2024.08.009]

更新日期/Last Update: 2024-05-14