中国中-高温地热资源勘探方向与优选靶区

Medium-high temperature geothermal resources in China:Exploration directions and optimizing prospecting targets

进一步明确中国中-高温地热资源的勘探方向和优选靶区,可以从宏观上指导地热资源勘探,提高地热探井成功率。基于最新的地热数据库,结合区域构造-热背景,分析地热系统的热源、通道、储层、盖层及流体特征等要素,圈定了中国中-高温地热资源勘探的4大勘探方向和16个优选靶区。具体为青藏高原内带(亚东-谷露裂谷带、错那裂谷带、申扎裂谷带、东构造结、西构造结)、青藏高原外带(共和-贵德盆地、川西松潘地区)、东部区(松辽盆地、伊通断裂带、长白山火山区、渤海湾盆地及周缘、东南沿海、雷州半岛-海南岛北部)和中部裂谷区(二连盆地、汾渭地堑、山西地堑)。

The clear exploration direction and optimization prospecting targets can guide the exploration and improve the success rate of exploration wells for medium-high temperature geothermal resources.Based on the latest geothermal database,combined with the regional tectonic thermal background,this paper systematically analyzes the heat source,the channel,the reservoir,and the cap rock and fluid characteristics of the geothermal system.Four major exploration directions and 16 optimal target areas for the exploration of the geothermal resources of medium-high-temperature in China are delineated.Specifically,the inner zone of the Qinghai Tibet Plateau(the Yadong-Gulu rift zone,the Guna rift zone,the Shenzha rift zone,and the eastern and western syntaxis of the Himalayan),the outer zone of the Qinghai Tibet Plateau(the Gonghe Guide basin,the Songpan region in western Sichuan),the eastern area(the Songliao Basin,the Yitong Fault Zone,the Changbai Mountain Volcanic Area,the Bohai Bay Basin and its surrounding areas,the southeast coast area,and the Leizhou Peninsula-the northern Hainan Island)and the central rift valley area(the Erlian Basin,the Fenwei Graben,and the Shanxi Graben).