河北武城凸起地热田地热地质特征  

Characteristics of geothermal geology of the Wucheng uplift geothermal field

作　　者：王迪 汪新伟[2,3] 毛翔[2,3] 武明辉 刘慧盈[2,3] 张瑄 王婷灏 WANG Di;WANG Xinwei;MAO Xiang;WU Minghui;LIU Huiying;ZHANG Xuan;WANG Tinghao(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;Sinopec Star Petroleum Co.,Ltd,Beijing 100083,China;Key Laboratory of Geothermal Resources Exploitation and Utilization,Sinopec,Beijin g 100083,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国石化集团新星石油有限责任公司,北京100083 [3]中国石化集团地热资源开发利用重点实验室,北京100083

出　　处：《地学前缘》2020年第3期269-280,共12页Earth Science Frontiers

基　　金：中国石化集团重点科技项目“渤海湾盆地重点地区地热资源评价与开发技术政策”(JP19002)和“中国典型地热田地热水水化学特征对比研究”(JKL18033)。

摘　　要：在"雄县模式"和环境压力的双重驱动下,河北地区已形成我国最大的地热供暖城市群。因此,研究武城凸起地热田地热地质特征,对河北省故城县地热开发具有重要的指导意义。本文通过测井、地震和区域地质资料,结合水化学特征、同位素测试结果的分析,系统分析了地热田的不同类型热储展布、储集层物性、地下热水补给来源和循环路径特征,并精细评价了地热资源量。结果表明武城凸起地热田热储类型主要为馆陶组砂岩热储和奥陶系岩溶热储。砂岩热储区域稳定分布,主要产水层为下馆陶组,底板埋深1 200~1 600 m,单井出水量79~123 m^3/h,井口水温52~54℃;岩溶热储有利区带主要分布在寒武—三叠系卷入的背斜核部,呈南北向带状展布,主要产水层为上马家沟组、下马家沟组和亮甲山组,顶板埋深2 100~2 900 m,单井出水量75~98 m^3/h,井口水温82~85℃。地下热水来源为西部太行山脉和北部燕山山脉,热水沿着NE-SW向断裂破碎带和岩溶不整合面向上水平运移进入浅层热储,通过沧县隆起和邢衡隆起在武城凸起汇集,形成中低温地热田。地下热水质类型为Cl-Na型,最大循环深度为2 822.5~3 032.5 m,^14C测年表明砂岩热储和岩溶热储年龄分别为21 ka和32 ka。明化镇组和石炭—二叠系分别为两套热储的直接盖层。武城凸起地热田地热资源量分层精细评价结果表明,热储地热资源量合计4.86×10^10 GJ,折合标煤16.6×10^8 t。年可开采地热资源量可满足供暖面积1.1×10^8 m^2,市场开发潜力巨大。Driven by the"Xiongxian model"and environmental pressure,the Hebei Province has become the largest agglomerate of urban geothermal heating in China.Therefore,studying geothermal geological characteristics of the Wucheng uplift can be significance for guiding geothermal development in Gucheng County,Hebei Province.In this paper,we studied the distribution patterns of different types of thermal reservoirs,as well as physical properties and characteristics of geothermal water recharge and circulation pathway of the reserviors,and performed geothermal resources evaluation,by combining logging,seismic and regional geological data with results of hydrochemical characteristic and isotopic analyses.The results showed that the geothermal field has two thermal reservoirs:sandstone and karst reservoirs.The former has a wide stable distribution,with the main aquifer situated in the lower Guantao Formation and a floor depth of 1200-1600 m.The geothermal water temperatures ranged between 52-54℃,and the well water yield was 79-123 m^3/h.The favorable zones of karst thermal reservoir are mainly distributed in the anticlinal core of the Cambrian-Triassic,extending in a N-S zonal direction,with the main aquifer in the upper Majiagou,lower Majiagou and Liangjiashan Formations and a roof depth of 2100-2900 m.The geothermal water temperatures ranged between 82-85℃,and the well water yield was 75-98 m^3/h.The geothermal waters originate from the recharge areas of the Taihang mountains to the west and Yanshan mountains to the north,moving horizontally along the NE-SW fracture zone and the karst unconformity plane into the shallow thermal reservoir,from where they meet in the Wucheng uplift,through the Cangxian and Xingheng uplifts,to form a mediurrrlow temperature geothermal reservoir of Cl-Na type water quality.The14C dating results indicated that the geothermal waters of sandstone and karst reservoirs were 21 ka and32 ka,respectively,with a recharge depth of more than 2822.5-3032.5 m.The Minghuazhen Formation and the Carboniferou

关 键 词：武城凸起 地热田 砂岩热储 岩溶热储 资源量评价 

分 类 号：P314[天文地球—固体地球物理学] P641[天文地球—地球物理学]