Acta Geologica Sinica (English Edition), 2019, 93(supp.2): 382–383

Power Generation Capacity of Karst Geothermal Reservoirs in Meso-Cenozoic Depression Basins: A Case Study of East Linqing Depression in North

ZHAO Jichu1, 2, KANG Fengxin2, 3, 4, 5, * and TAN Zirong1, 2

1 The Second Institute of Hydrogeology and Engineering Geology, Provincial Bureau of Geology & Mineral Resources, , 253072 2 Shandong Provincial Research Center of Geothermal Resources and Reinjection, Dezhou, 253072, Shandong 3 Shandong Provincial Bureau of Geology & Mineral Resources, , 250013, Shandong 4 Shandong Provincial Research Center of Geological Survey Engineering Technology, Jinan, 250013, Shandong 5 Shandong Provincial Research Center of Groundwater Environment Protection and Remediation, Jinan, 250013, Shandong

Citation: Zhao et al., 2019. Power generation capacity of karst geothermal reservoirs in Meso-Cenozoic depression basins: a case study of east Linqing Depression in North China. Acta Geologica Sinica (English Edition), 93(supp.2): 382–383.

Abstract: Geothermal energy is an indigenous clean energy; its exploration, the author compiled the average geothermal gradient application has long been proved beneficial to social economy. map of Cenozoic, and the spatial distribution map of Cambrian- Though there is a large scale direct usage of geothermal energy Ordovician strata. Considering the whole Cambrian-Ordovician for about 6 100m2 of district heating projects in Shandong strata as the heat source for geothermal power plant construction province, no geothermal power plant built there due to lack of via Enhance Geothermal System technology, the lowest high enthalpy geothermal fluid. The paper aims at to find higher temperature limit for utilization of the thermal fluid set to 70℃, enthalpy geothermal energy at the deep part of the East Linqing the coefficient of the thermal energy of geothermal fluid change depression in Shandong Province. Based on the regional geology into electricity set to 7%, the paper estimated the total thermal information, the paper established that there are huge layers of energy stored in the Cambrian-Ordovician karst geothermal Ordovician and Cambrian carbonate strata buried at a favorable reservoir for power generation is 127×1019 J, and the power depth, which has naturally developed fissures by water corrosion and faulting, holding geothermal fluid, making it an ideal geothermal reservoir for development. By rechecking the seismic interpretation and drilling results obtained during petroleum

Fig. 1. The tectonic sketch map of the study area.

* Corresponding author. E-mail: [email protected] Fig. 2. The distribution map of igneous rocks. © 2019 Geological Society of China http://www.geojournals.cn/dzxbcn/ch/index.aspx; https://onlinelibrary.wiley.com/journal/17556724 Acta Geologica Sinica (English Edition), 2019, 93(supp.2): 382–383 383

Fig. 4. Inferred reservoir temperature contour map. essentials[J].Book Reviews, 25(4): 46–49. Tester, Jefferson W. et al.. The Future of Geothermal Energy – Fig. 3. The thickness of Ordovician-Cambrian strata and Impact of Enhanced Geothermal Systems (EGS) on the United bury depth of the strata bottom layer. States in the 21st Century (M). Idaho Falls: Idaho National Laboratory. 2006:13–16. Table 1 Table of thermal storage resources and power WANG Jiyang, HU Shengbiao, PANG Zhonghe et al.” Estimate generation capacity of the reservoir of Geothermal Resources Potential for Hot Dry Rock in the Continental Area of China”,Science of technology reviw, 2012, Temperature Area Thermal energy power generation 2 30(32), pp. 25–31.[J]. 2012, 30(32):25–31. /℃ /km /1019J capacity /103MWe Zhang Cunxia.2008.Stratum Framework and Distribution >220 125.68 6.39 4.73 Characteristics in the Eastern Area of LinqingDepression[D]. 200～220 495.03 21.8 16.13 Shandong: China University of Petroleum (East China)[D]. 180～200 854.56 31.8 23.53 ZhengKeyan,Pan Xiaoping. 2009.Status and Prospect of 160～180 1666.6 42.3 31.30 Geothermal Generation Development in China[J].SINO- 140～160 883.12 17.5 12.95 GLOBAL ENERGY. 2:45–48. 120～140 473.33 5.35 3.96 100～120 641.08 2.17 1.61 About the first author total 4498.32 127 94.20 Zhao Jichu; Male; born in 1975 in Shaodong County, Hunan 3 Province;Master of Engineering, Applied Research fellow in generation capacity is 94.20 ×10 MWe at the study area. The Engineering Technology;work at Shandong Provincial high temperature zones with temperature greater than 200℃ can Research Center of Geothermal Resources meet the electricity needs of the study area. and Reinjection. Focused on the Sustainable development of Geothermal energy; Key words: Geothermal energy, High enthalpy, Enhanced Email:[email protected]; Phone: 13505346544. geothermal system, Geothermal power plant About the corresponding author Acknowledgments: This work is granted by Shandong KANG Fengxin, male, born in 1968 in Provincial Bureau of Geology & Mineral Resourceskey scientific Zhaoyuan City, Shandong Province; Doctor; graduated from China University Of and technological project (Grant No. KY2017) Geosciences(); professor of Shandong Provincial Bureau of Geology and Mineral Resources. He is now References interested in the study on metallogenetic genesis of Li Sanzhong, SuoYanhui, Dai Liming, et al. Development of the geothermal fields and sustainable yield of geothermal water Bohai Bay Basin and destruction of the North China Craton. and groundwater. Email: [email protected]; phone: 0531 Earth Science Frontiers,2010,17(4):064–089[J].2010, 17(4):64 -86403485, 13505311281. –89. Schavemaker P, Lou V D S. 2009. Electrical power system