| Title | Occurrence Mechanism and Geothermal Exploration Model of Low-Medium Temperature Convective Geothermal Systems in Jiaodong Peninsula |
|---|---|
| Authors | SHI Meng, KANG Fengxin, ZHANG Jie, YIN Tao, GAO Song, ZHENG Tingting, JIANG Haiyang |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | Jiaodong Peninsula, Heat controlled Structure, water conducted Structure, V type structure |
| Abstract | Jiaodong Peninsula is quite rich in geothermal resources. However, due to the lack of mature theory to guide the exploration, there are a large number drilling wells which are "heat without water" or "water without heat" in the process of geothermal drilling. How to accurately explore geothermal resources is still a big problem. This paper comprehensively analyzed the mechanisms of geothermal resources in Jiaodong Peninsula on the basis of 1) geothermal geological survey of the 15 hot springs, 2) heat conducting faults and water transmitting faults analysis, 3) temperature measurement, 4) distribution characteristics of geothermal fields and reservoir and drilling data analysis of 15 geothermal fields. Besides, 12 artificial geothermal deep wells were used to test our hypothesis. Based on the above analysis, we concluded that the geothermal resources in Jiaodong Peninsula are mainly distributed in the “V†shape area where the hanging wall of the NE- and NW-trending faults intersect to each other. The geothermal reservoir is controlled by the NE- and NW-trending faults and has an irregular columnar shape. Its geo-temperature field is also controlled by the geothermal fluid flow field and the geothermal reservoir morphology, that the distribution is "Π" shape. According to these conclusions, we proposed a "V" shape model of heat controlled and water conducted faults, and clarify the mechanism of deep geothermal resources in Jiaodong Peninsula. Our work provides theoretical basis for the exploration of the deep geothermal resources in Jiaodong Peninsula. |