| 雄安新区高阳地热田蓟县系热储特征及资源量评估 |
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| 关键词:geothermal reservoirs characteristics carbonate rock resource evaluation Gaoyang geothermal field Xiongan New Area |
| 基金项目:国家重点研发项目(编号: 2019YFB1504102);中国地质调查局地质调查项目(编号: DD20189114; DD20190129; DD20221677);湖南省地质院科研项目基金项目(编号: HNGSTP202102) |
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| 摘要: |
| Geothermal Reservoirs Characteristics and Resource Assessment of Jixian System in Gaoyang Geothermal Field, Xiongan New Area |
| Geothermal wells with the highest temperature and productivity were drilled in Gaoyang low uplift region of Xiongan New Area in North China basin, revealing the existence of the second space for geothermal exploitation in the deep part of Xiongan New Area, the Jixian carbonate rock geothermal reservoir. The large-scale developent of deep carbonate geothermal reservoir in Gaoyang Low uplift is of great significance in serving the construction of ecological civilization and clean heating in Xiongan New Area. In this paper, the geothermal reservoir space structure of Gaoyang low uplift in Xiongan New Area is established, and the geothermal reservoir distribution and properties within 5000 m depth of the geothermal field in Xiongan New Area are preliminatively identified. The results show that the deep carbonate reservoirs in Gaoyang geothermal field are mainly composed of Wumishan Formation and Gaoyuzhuang Formation of Jixian System. The top boundary of Wumishan Formation in Jixian system has a burial depth of 3000~3500 m, a thickness of 300~1000 m, a geothermal reservoir temperature of 100~120 ℃, and a water yield of 90~170 m3/h. It exhibits characteristics including high temperature, large water volume and easy reservoir recharge. The top boundary of Gaoyuzhuang Formation has a burial depth of 1425~4200 m, and the thickness is generally not less than 800 m. The formation temperature is generally 110~140 ℃, and the water volume is about 50~100 m3/h, which can be used as the reserve resources of the new area. The spatial structure of deep carbonate geothermal reservoir was analyzed. The whole geothermal field is divided into three sections, which are west depression area, central uplift area and east slope area respectively from west to east. The western depression area gradually covers the Cambrian and Carboniferous Permian from west to east. The central uplift area is Yanling buried hill; The upper part of Wumishan Formation in the eastern slope area is covered by Paleogene strata. In this paper, the recoverable geothermal resources of Jixian Systerm in Gaoyang geothermal field are calculated as 867 200 tons of standard coal respectively by geothermal reservoir method. Numerical simulation results show that the annual recoverable geothermal resources of Jixian Systerm are equivalent to 89.86×104 t of standard coal under the condition that the water level drop is no less than 150 m and the temperature drop of mining well is less than 2 ℃. The results of the geothermal reservoir method and the numerical method are similar, and the evaluation results can provide reference for the planning and de-velopment of geothermal resources in Gaoyang. |
| GAO Jun,LI Yan-yan,WANG Gui-ling,ZHANG Bao-jian,XING Yi-fei.2023.Geothermal Reservoirs Characteristics and Resource Assessment of Jixian System in Gaoyang Geothermal Field, Xiongan New Area[J].Acta Geoscientica Sinica,44(1):133-144. |
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