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| 黄骅坳陷馆陶组热储垂向回灌能力识别——以天津地区为例 |
| Identification of the vertical reinjection capacity of thermal reservoirs of Guantao Formation in Huanghua Depression: A Case Study of the Tianjin |
| 投稿时间：2026-03-16 修订日期：2026-03-30 |
| DOI： |
| 中文关键词: 地热 砂岩热储 回灌能力 影响因素 垂向分布 黄骅坳陷 |
| 英文关键词:geothermal sandstone thermal reservoir reinjection ability influencing factor vertical distribution Huanghua Depression |
| 基金项目:地热资源开发技术与装备教育部工程研究中心开放课题“注入流速影响下的砂岩热储优势回灌层位渗透性及化学场变化规律研究”（250223）、天津地热勘查开发设计院2024年科技创新项目任务书“不同回灌条件下砂岩储层渗流特征变化及水-热-化耦合机理研究”（地热院任［2024］01号）及天津市重点研发计划“天津东丽湖汛期雨洪水补给深部地热储层的关键技术研究”（23YFZCSN00390）资助 |
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| 中文摘要: |
| 砂岩热储是我国地热开发的主要对象，分布广、潜力大，但回灌难、易衰减等问题制约了其可持续开发。黄骅坳陷砂岩热储的地质条件、研究程度及应用场景在我国砂岩热储分布区具有代表性，而传统研究将热储视为整体开展单井及区域回灌能力评价和回灌影响因素分析，未考虑其垂向非均质性导致的回灌能力差异，难以确定优势回灌层段。研究基于黄骅坳陷内2眼馆陶组地热井的井下分层监测回灌试验数据，按照常规馆陶组热储垂向3段划分原则，以总回灌量、单位砂层厚度回灌量为核心判断指标，系统分析回灌能力垂向分布规律。结果表明馆Ⅰ段为优势回灌层段，回灌能力呈现馆Ⅰ段>馆Ⅱ段>馆Ⅲ段的特征。该结论支撑同构造单元发生衰减地热井BT06选择馆Ⅰ段和馆Ⅱ段作为补射孔作业目标，通过作业前后回灌试验数据对比，该井回灌量增加2.4倍，已超过早期水平。验证了研究结论的实用性与可靠性，为砂岩热储的高效、可持续开发提供了技术支撑。 |
| 英文摘要: |
| The sandstone geothermal reservoirs are the primary target for geothermal development in China, which is characterised by extensive distribution and substantial potential. However, challenges such as difficult reinjection and easy attenuation constrain their sustainable exploitation. The geological conditions, research maturity and application scenarios of the sandstone geothermal reservoirs in the Huanghua Depression are representative of sandstone geothermal reservoir distribution areas in China. However, traditional research has treated the geothermal reservoir as a homogeneous whole when conducting single-well and regional reinjection capacity assessments and analyses of reinjection influencing factors, failing to account for variations in reinjection capacity caused by vertical heterogeneity, which makes it difficult to identify the optimal reinjection intervals. This study utilises reinjection test data from downhole stratigraphic monitoring of two Guantao Formation geothermal wells in the Huanghua Depression. Following the conventional principle of dividing the Guantao Formation reservoir into three vertical sections, and using total reinjection volume and reinjection volume per unit thickness of sandstone as core evaluation indicators, the study systematically analyses the vertical distribution patterns of reinjection capacity. The results indicate that the Guantao I section is the dominant reinjection section, with reinjection capacity exhibiting a pattern of Guantao I > Guantao II > Guantao III. This conclusion supports the selection of the Guantiao I and II sections as targets for additional perforation operations in geothermal well BT06, which is located within the same tectonic unit and exhibits declining production. A comparison of reinjection test data before and after the operation revealed that the well’s reinjection volume increased by 2.4 times, exceeding its earlier levels. This validates the practicality and reliability of the research findings and provides technical support for the efficient and sustainable development of sandstone thermal reservoirs. |
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