防灾与环境

小井间距双井溶腔长期稳定性的模拟分析

  • 陈盛威 ,
  • 梁五星 ,
  • 郭玉平 ,
  • 程功 ,
  • 王同涛
展开
  • 1.重庆大学 煤矿灾害动力学与控制国家重点实验室,重庆 400045;
    2.平煤神马集团联合盐化有限公司,河南 平顶山 467000;
    3.中科院武汉岩土力学研究所,武汉 430000
陈盛威(1998—),男,广东佛山人,硕士生,主要从事岩石力学方面的研究。E-mail:1245181801@qq.com
梁五星(1971—),男,河南博爱人,高级工程师,主要从事岩盐开采与地下空间利用方面的工作。E-mail:480262715@qq.com

收稿日期: 2024-07-28

  网络出版日期: 2025-05-06

Simulation Analysis of Long-Term Stability of Two-Well Cavern with Small Spacing

  • Chen Shengwei ,
  • Liang Wuxing ,
  • Guo Yuping ,
  • Cheng Gong ,
  • Wang Tongtao
Expand
  • 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400045, P.R. China;
    2. China Pingmei Shenma Group United Salt and Chemical Co.,Ltd., Pingdingshan, Henan 467000, P.R. China;
    3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430000, P.R. China

Received date: 2024-07-28

  Online published: 2025-05-06

摘要

地下盐穴的稳定性研究对于我国地下储气库的广泛应用具有重要意义。通过FLAC3D模拟软件从体积收缩率、腔体顶板沉降量、相对塑性区体积3个角度探究井口间距和循环内压对盐岩储气库运行稳定性的影响,结果表明:井口间距为12 m或14 m时,双井溶腔运行30年后仍具有较好的长期稳定性;循环内压的变化会显著影响腔体的顶板沉降量等指标,综合考虑双井溶腔的运行安全性和经济性,建议储气库运行期间最低运行内压不低于8 MPa。讨论了井口间距对管柱单元沉降量及周围相对塑性区体积的影响,结果表明:在不超过20 m的情况下,井口间距的变化对管柱单元的影响不大。

本文引用格式

陈盛威 , 梁五星 , 郭玉平 , 程功 , 王同涛 . 小井间距双井溶腔长期稳定性的模拟分析[J]. 地下空间与工程学报, 2025 , 21(2) : 661 -671 . DOI: 10.20174/j.JUSE.2025.02.34

Abstract

The stability of underground salt caverns plays an important practical role in the wide application of underground gas storage in China. By using FLAC3D simulation software, the effects of wellhead spacing and cyclic internal pressure on the operational stability of salt rock gas storage were explored from three perspectives: volume shrinkage rate, cavern roof settlement, and relative plastic zone volume. The simulation results showed that when the wellhead spacing is 12 m or 14 m, the two-well salt cavern still had good long-term stability after 30 years of operation. The change in cyclic internal pressure will significantly affect the indicators such as the settlement of the roof of the carven. Taking into account the safety and economy of the operation of the two-well salt cavern, the minimum operating internal pressure for gas storage operation should not be lower than 8 MPa. And the influence of wellhead spacing on the settlement of the pipe string unit and the volume of the surrounding relative plastic zone was discussed. The results showed that the change in wellhead spacing had little effect on the pipe string unit when it did not exceed 20 meters.

参考文献

[1] 杨春和,梁卫国,魏东吼,等.中国盐岩能源地下储存可行性研究[J].岩石力学与工程学报, 2005(24): 4409-4417. (Yang Chunhe, Liang Weiguo, Wei Donghou, et al. Investigation on possibility of energy storage in salt rock in China[J]. Chinese Journal of Rock mechanics and Engineering, 2005(24): 4409-4417.(in Chinese))
[2] 李朋,李银平,施锡林,等.多夹层盐矿水采沉渣空隙特征与储气能力评价[J].岩土力学, 2022, 43(1): 76-86. (Li Peng, Li Yingping, Shi Xilin, et al. Pore characteristics and volume capacity evaluation of insoluble sediments for gas storage in multi-interbedded salt formations[J], Rock and Soil Mechanics, 2022, 43(1): 76-86. (in Chinese))
[3] 刘伟,Muhammad Nawaz,李银平,等.盐岩渗透特性的试验研究及其在深部储气库中的应用[J].岩石力学与工程学报, 2014, 33(10): 1953-1961. (Liu Wei, Muhammad N, Li Yingping, et al. Experimental study of permeability of salt rock and its application to deep underground gas storage[J], Chinese Journal of Rock Mechanics and Engineering, 2014, 33(10): 1953-1961. (in Chinese))
[4] 刘伟莎.层状盐岩储气库建腔期安全综合评价及多因素优化研究[D].重庆:重庆大学, 2015. (Liu Weisha. Research on the comprehensive safety assessment and multi-factor optimization of gas storage during the construction in bedded salt rock[D]. Chongqing: Chongqing University, 2015. (in Chinese))
[5] 曾大乾,张广权,张俊法,等.中石化地下储气库建设成就与发展展望[J].天然气工业, 2021, 41(9): 125-134. (Zeng Daqian, Zhang Guangquan, Zhang Junfa, et al. Sinopec's UGS construction achievement and development prospect[J]. Natural Gas Industry, 2021, 41(9): 125-134. (in Chinese))
[6] 唐子茜,姜德义,陈结,等.小井间距双井盐穴储库稳定性综合评价研究[J].地下空间与工程学报, 2021, 17(6): 1997-2006. (Tang Zixi, Jiang Deyi, Chen jie, et al. Comprehensive evaluation of the stability of two well salt cavern storage with small well spacing[J]. Chinese Journal of Underground Space and Engineering, 2021, 17(6): 1997-2006. (in Chinese))
[7] 易亮,陈德玖,何怡.含夹层大尺寸型盐水溶造腔试验研究[J].重庆科技学院学报(自然科学版), 2020, 22(5): 41-45, 65. (Yi Liang, Chen Dejiu, He Yi. Experimental study on solution mining with large-size molded layered salt rock[J]. Journal of Chongqing University of Science and Technology (Natural Sciences Edition), 2020, 22(5): 41-45, 65. (in Chinese))
[8] 姜德义,邱华富,易亮,等.大尺寸型盐造腔相似试验研究[J].岩石力学与工程学报, 2012, 31(9): 1746-1755. (Jiang Deyi, Qiu Huafu, Yi Liang, et al. Similar experimental study of cavity building using large-size molded salt rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(9): 1746-1755. (in Chinese))
[9] 周俊驰,黄孟云,班凡生,等.盐穴储气库双井造腔技术现状及难点分析[J].重庆科技学院学报(自然科学版),2016,18(1):63-67. (Zhou Junchi, Huang Mengyun, Ban Fansheng, et al. Comprehensive analysis about dual well solution mining technology in salt cavern storage[J]. Journal of Chongqing University of Science and Technology (Natural Sciences Edition), 2016, 18(1): 63-67. (in Chinese))
[10] 易胜利.岩盐钻井水溶双井连通开采工艺的研究与推广[J].中国井矿盐, 2003(6): 20-23. (Yi Shengli. Study on and popularization of the communication mining process of double wells in rock salt drilling[J]. China well and rock salt, 2003(6): 20-23. (in Chinese))
[11] 梁卫国,赵阳升,李志萍,等.群井致裂控制水溶盐矿开采分析及数值模拟[J].辽宁工程技术大学学报, 2004(5): 609-612. (Liang Weiguo, Zhao Yangsheng, Li Zhiping, et al. Analysis and numerical simulation of multi-well hydraulic fracturing and controlling solution mining for rock salt deposit[J]. Journal of Liaoning Technical University, 2004(5): 609-612. (in Chinese))
[12] 刘新荣,姜德义,许江,等.岩盐溶腔围岩应力分布规律的有限元分析[J].重庆大学学报(自然科学版), 2003(2): 39-41, 46. (Liu Xinrong, Jiang Deyi, Xu Jiang, et al. FEM analysis of stress distribution law in the rock salt cavity's surrounding rock[J]. Journal of Chongqing University, 2003(2): 39-41, 46. (in Chinese))
[13] 任松,姜德义,杨春和,等.岩盐水溶开采沉陷新概率积分三维预测模型研究[J].岩土力学, 2007(1): 133-138. (Ren Song, Jiang Deyi, Yang Chunhe, et al. Study on a new probability integral 3D model for forecasting solution mining subsidence of rock salt[J]. Rock and Soil Mechanics, 2007(1): 133-138. (in Chinese))
[14] 杨春和,梁卫国,魏东吼,等.中国盐岩能源地下储存可行性研究[J].岩石力学与工程学报, 2005(24): 4409-4417. (Yang Chunhe, Liang Weiguo, Wei Donghou, et al. investigation on possibility of energy storage in salt rock in China[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(24): 4409-4417. (in Chinese))
[15] 王粟,武志德,王汉鹏,等.地下盐穴储气库周期注采运行稳定性评价[J].油气储运, 2018, 37(7): 775-779, 789. (Wang Li, Wu Zhide, Wang Hanpeng, et al. Analysis on the stability of salt-cavern underground gas storage during cyclic injection and production[J]. Oil & Gas Storage and Transportation, 2018, 37(7): 775-779, 789. (in Chinese))
[16] 喻超,黄小兰,马洪岭.内压对含软弱夹层盐岩储库稳定性影响的研究[J].武汉工业学院学报, 2012, 31(2): 68-71, 76. (Yu Chao, Huang Xiaolan, Ma Hongling. Numerical simulation research on the influence of inner pressure stability of salt cavern storage including weak interlayer[J]. Journal of Wuhan Polytechnic University, 2012, 31(2): 68-71, 76. (in Chinese))
[17] Li Q D, Ning Z X, Liu J, et al. Stability and economic evaluation of multi-step horizontal salt caverns with different step distances in bedded salt formations [J]. Journal of Energy Storage, 2023, 57: 1-11.
[18] Chen J, Lu D, Liu W, et al. Stability study and optimization design of small-spacing two-well (SSTW) salt caverns for natural gas storages [J]. Journal of Energy Storage, 2020, 27: 101131.
[19] Liu W, Zhang Z X, Chen J, et al. Feasibility evaluation of large-scale underground hydrogen storage in bedded salt rocks of China: A case study in Jiangsu province [J]. Energy, 2020, 198: 117348.
[20] Wang Y F, Zhang X, Jiang D Y, et al. Study on stability and economic evaluation of two-well-vertical salt cavern energy storage [J]. Journal of Energy Storage, 2022, 56: 106164.
[21] Yang C H, Wang T T, Qu D A, et al. Feasibility analysis of using horizontal caverns for underground gas storage: A case study of Yunying salt district [J]. Journal of Natural Gas Science and Engineering, 2016, 36: 252-66.
[22] Wang T T, Yan X Z, Yang H L, et al.A new shape design method of salt cavern used as underground gas storage [J]. Applied Energy, 2013, 104: 50-61.
[23] Wang T T, Yang C H, Chen J S, et al. Geomechanical investigation of roof failure of China's first gas storage salt cavern [J]. Engineering Geology, 2018, 243: 59-69.
[24] Liu W, Zhang Z X, Fan J Y, et al. Research on the stability and treatments of natural gas storage caverns with different shapes in bedded salt rocks [J]. Ieee Access, 2020, 8: 18995-19007.
[25] 唐子茜. 盐岩小间距双井腔体扩展规律及稳定性评价研究[D].重庆:重庆大学,2021. (Tang Zixi. Study on expansion law and stability evaluation of two-well cavern with small spacing in salt rock[D]. Chongqing: Chongqing University, 2021. (in Chinese))
[26] 尹雪英,杨春和,陈剑文.金坛盐矿老腔储气库长期稳定性分析数值模拟[J].岩土力学, 2006(6): 869-874. (Yin Xueying, Yang Chunhe, Chen Jianwen. Numerical simulation research on long-term stability of gas storage in Jintan salt mine[J]. Rock and Soil Mechanics, 2006(6): 869-874. (in Chinese))
文章导航

/