油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (6): 757-764.doi: 10.13809/j.cnki.cn32-1825/te.2023.06.006

• 地热能开发与利用 • 上一篇    下一篇

鄂尔多斯盆地东南缘岩溶热储对井回灌示踪试验

薛宇泽1,2(),张玉贵3(),麻银娟3,薛超3   

  1. 1.自然资源部煤炭资源勘查与综合利用重点实验室,陕西 西安 710021
    2.陕西省煤田地质集团有限公司,陕西 西安 710021
    3.陕西省一三一煤田地质有限公司,陕西 韩城 715400
  • 收稿日期:2023-03-08 出版日期:2023-12-26 发布日期:2024-01-03
  • 通讯作者: 张玉贵(1989—),男,本科,工程师,主要从事水文地质与矿井地质工作。地址:陕西省韩城市金城区象山路一三一队,邮政编码:715400。E-mail:491782203@qq.com
  • 作者简介:薛宇泽(1988—),男,硕士,工程师,主要从事地热地质方面研究。地址:陕西省西安市经开区文景路26号陕煤地质科研办公楼,邮政编码:710021。E-mail:xyz-88111@163.com
  • 基金资助:
    陕西省创新能力支撑计划项目“陕西省地热钻井换热供暖一体化试验平台建设”(2021PT-028);陕西省秦创原‘科学家+工程师’队伍建设项目“陕西省地热能高效利用技术“科学家+工程师”(2022KXY-039);自然资源部煤炭资源勘查与综合利用重点实验室重大专项“不同型式地埋管换热性能试验研究”(ZP2020-1);陕西投资集团有限公司科技项目、陕西省煤田地质集团有限公司重大专项“陕西省韩城市东部断陷区岩溶地热水资源赋存规律研究”(SIGC2023-KY-05);陕西投资集团有限公司科技项目、陕西省煤田地质集团有限公司重大专项“陕西省韩城市东部断陷区岩溶地热水资源赋存规律研究”(SMDZ-2022ZD-3)

Reinjection tracer test of karst geothermal reservoir in the southeastern margin of Ordos Basin

XUE Yuze1,2(),ZHANG Yugui3(),MA Yinjuan3,XUE Chao3   

  1. 1. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an, Shaanxi 710021, China
    2. Shaanxi Coal Geology Group Co., Ltd., Xi'an, Shaanxi 710021, China
    3. Shaanxi 131 Coal Geology Co., Ltd., Hancheng, Shaanxi 715400, China
  • Received:2023-03-08 Online:2023-12-26 Published:2024-01-03

摘要:

回灌对维持地热储层压力、延长地热田寿命、保护生态环境具有重要的作用。鄂尔多斯盆地东南缘韩城地区广泛发育岩溶裂隙型地热资源,但其开发利用规模较小,为进一步评价该地区岩溶热储开发潜力,依托某地热工程,选取硫氰酸铵作为示踪剂开展对井回灌示踪试验,采用热突破模型预测长期回灌可能引起的开采井温度变化。结果表明,采灌井之间水力联系密切,有1个主通道与之直接相联,也可能存在其他次级通道。主通道上可能有溶潭发育,开采井温度100 a内下降了8.31 ℃,该对井回灌系统在服务期内未引起热储温度剧烈下降。

关键词: 鄂尔多斯盆地, 岩溶热储, 对井回灌, 示踪试验, 开采井温度

Abstract:

Reinjection plays a crucial role in maintaining the pressure of geothermal reservoirs, extending the lifespan of geothermal fields and preserving the environment. In the Hancheng area, located at the southeastern margin of the Ordos Basin in Shaanxi province, there is an abundance of karst geothermal resources. Despite this, the level of development and utilization of these resources in the region remains relatively limited. To further evaluate the development potential of Karst geothermal resources in the region, we implemented a karst geothermal heating project and conducting a tracer test, employing NH4SCN as the tracer. The goal was to establish an hydraulic connection between the production well and the reinjection well. Utilizing the thermal breakthrough model, predictions were made regarding the changes in the temperature of the production well as a consequence of long-term reinjection. The findings suggest that there is a primary direct pathway for the flow of water, and possibly a secondary path that may contribute to groundwater storage. The temperature of production well's water is projected to decline by 8.31 ℃ over 100 years due to the reinjection process. However, this decline is not expected to cause a severe temperature drop in the geothermal reservoir within this dual-well system.

Key words: Ordos basin, karst geothermal, double wells reinjection, tracer test, production well temperature

中图分类号: 

  • TE132