| 酸化压裂技术对碳酸岩盐储层地热井的增灌能力影响研究 |
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| 关键词:acid fracturing carbonate reservoir technology of increasing production exploration and reinjection capacity |
| 基金项目:北京市自然科学基金项目(编号: 1244052; 8234063)；北京市规划和自然资源委员会“北京市部分地区地热资源增灌能力评价”项目 |
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| Study on the Influence of Acid Fracturing Technology on Increasing the Reinjection Capacity of Carbonate Reservoir Geothermal Wells |
| Geothermal reinjection is a reverse exploitation process. Domestic research has mainly focused on the key technologies of conventional reinjection and the influence of reinjection on geothermal reservoirs. Few studies have been conducted on the influence of acid fracturing on the reinjection capacity of carbonate reservoirs. To address this gap, the current study carried out acid fracturing and reinjection tests in a carbonate reservoir geothermal well in Beijing, and comparatively analyzed the exploration and reinjection capacity before and after acid fracturing. Specifically, the study explored the effect of acid fracturing technology on increasing the reinjection capacity of carbonate reservoir geothermal wells from the aspects of exploration and reinjection capacity, permeability coefficient, skin coefficient, and scale of geothermal reservoir reconstruction. The results showed that acid fracturing can significantly improve the exploration and reinjection capacities of geothermal wells, and that the pressurized reinjection volume after acid fracturing is significantly increased. The evaluation results of acid fracturing showed that the permeability coefficient increased by 17% and the permeability increased by 16% after acid fracturing, with an obvious overall improvement effect. The skin coefficient of geothermal well was reduced from 1.44 to –3.33 after acid fracturing, which not only removed the damage near the well, but also increased the original permeability of the initial formation. The evaluation results of the scale of geothermal reservoir reconstruction also confirmed the effect of acid fracturing. |
| SUN Zhentian,LI Wen,ZHANG Jinping,HE Tiezhu,YANG Junwei,ZHANG Wenyang,CHEN Jiaxi.2025.Study on the Influence of Acid Fracturing Technology on Increasing the Reinjection Capacity of Carbonate Reservoir Geothermal Wells[J].Acta Geoscientica Sinica,46(2):439-448. |
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