云南省宜良地热田基本特征研究及成因分析
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摘要
对云南宜良盆地地热资源水文地质条件、热储层结构及地热田特征等分析研究,可将宜良地热田划分为3个相对独立的地热区,并对宜良地热田基本特征、形成机制、储集形式等规律进行探究,建立了宜良地热田热储概念模型,其成因模式为大气降水补给的断裂控热深循环型地热系统。研究区热储岩性主要为震旦系灯影组白云岩,为岩溶型层状热储,热储温度一般在43℃～55℃之间,埋藏深度一般在800～1 200 m。宜良断裂带为水热对流循环提供了良好的通道和储集空间,地下热水在震旦系灯影组岩溶含水层中富集,最终形成宜良地热田。
The Yiliang geothermal field can be divided into three independent areas based on the analysis of the hydrogeological conditions,geothermal reservoir structures and geothermal field characteristics of the geothermal resources of Yiliang Basin,Yunnan. The geothermal reservoir conceptual model is set up through the study of the basic characteristics,formation mechanism and reservoir type of Yiliang geothermal field,and it is concluded that the genetic model is the deep fault-controlled heat circulation system supplied by meteoric water. The geothermal reservoir mainly consists of dolomite of Sinian Denying Formation,belonging to karst-type layered geothermal reservoir,with the temperature range of 43℃ ～ 55℃ and burial depth of 800 ～ 1 200 m. Yiliang fault provides a good pathway and reservoir space for the hydrothermal convection circulation. The geothermal water is enriched in the karst aquifer of the Sinian Denying Formation,forming the Yiliang geothermal field.
The Yiliang geothermal field can be divided into three independent areas based on the analysis of the hydrogeological conditions,geothermal reservoir structures and geothermal field characteristics of the geothermal resources of Yiliang Basin,Yunnan. The geothermal reservoir conceptual model is set up through the study of the basic characteristics,formation mechanism and reservoir type of Yiliang geothermal field,and it is concluded that the genetic model is the deep fault-controlled heat circulation system supplied by meteoric water. The geothermal reservoir mainly consists of dolomite of Sinian Denying Formation,belonging to karst-type layered geothermal reservoir,with the temperature range of 43℃ ～ 55℃ and burial depth of 800 ～ 1 200 m. Yiliang fault provides a good pathway and reservoir space for the hydrothermal convection circulation. The geothermal water is enriched in the karst aquifer of the Sinian Denying Formation,forming the Yiliang geothermal field.
引文
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[3]鲍新华,张宇,李野,等.松辽盆地增强型地热系统开发选区评价[J].吉林大学学报(地球科学版),2017,47(2):263-271.BAO Xin-hua,ZHANG Yu,LI Ye,et al. Evaluation of development selection for enhanced geothermal system in Songliao Basin[J]. Journal of Jilin University(Earth Science Edition),2017,47(2):263-271.
[4] Xu S G,Ba J J. Predicting strata temperature distribution from drilling fluid temperature[J]. International Journal of Heat and Technology,2016,34(2):345-346.
[5]祖国全,祖晅,何高清.地热能是影响地球年均气温的重要因素[J].世界地质,2015,34(2):565-570.ZU Guo-quan,ZU Xuan,HE Gao-qing. Geothermal energy is an important factor affecting earth's average annual temperature[J]. Global Geology,2015,34(2):565-570.
[6] Abul K,Cooke D,Hand M. Seismic mapping and geomechanical analyses of faults within deep hot granites,a workflow for enhanced geothermal system projects[J].Geothermics,2015,53:46-56.
[7]杨峰田,庞忠和,王彩会,等.苏北盆地老子山地热田成因模式[J].吉林大学学报(地球科学版),2012,42(2):468-475.YANG Feng-tian,PANG Zhong-he,WANG Cai-hui,et al. Genesis model of Laozishan geothermal field,Subei basin[J]. Journal of Jilin University(Earth Science Edition),2012,42(2):468-475.
[8]张萌,杨豪,彭振宇,等.浙江省区域地质背景及地热资源赋存特征[J].科学技术与工程,2016,16(19):30-36.ZHANG Meng,YANG Hao,PENG Zhen-yu,et al. The regional geological background and occurrence characteristics of geothermal resources in Zhejiang province[J].Science Technology and Engineering,2016,16(19):30-36.
[9]王晓星,吴能友,苏正,等.增强型地热系统开发技术研究进展[J].地球物理学进展,2012,27(1):15-22.WANG Xiao-xing,WU Neng-you,SU Zheng,et al. Progress of the enhanced geothermal systems(EGS)development technology[J]. Progress in Geophysics,2012,27(1):15-22.
[10] Guo Q H,Liu M,Li J,et al. Acid hot springs discharged from the Rehai hydrothermal system of the Tengchong volcanic area(China):formed via magmatic fluid absorption or geothermal steam heating?[J]. Bulletin of Volcanology,2014,76(10):868.
[11]石卓,金旭,管彦武,等.赤峰热水镇地热田地热流体流动模型[J].世界地质,2010,29(3):485-489.SHI Zhuo,JIN Xu,GUAN Yan-wu,et al. Flow model of geothermal fluid in Reshuizhen geothermal field of Chifeng[J]. Global Geology,2010,29(3):485-489.
[12]许天福,袁益龙,姜振蛟,等.干热岩资源和增强型地热工程:国际经验和我国展望[J].吉林大学学报(地球科学版),2016,46(4):1139-1152.XU Tian-fu,YUAN Yi-long,JIANG Zhen-jiao,et al.Hot dry rock and enhanced geothermal engineering:international experience and China prospect[J]. Journal of Jilin University(Earth Science Edition),2016,46(4):1139-1152.