摘要
雄安新区在暂不考虑开采砂岩热储地热资源的前提下,探明碳酸盐岩热储东部边界断裂牛东断裂带的分布位置与地热资源品质,对新区地热资源开发利用规划的编制与整体能源利用布局均有着重要意义。以雄安新区高铁片区第一口碳酸盐岩热储勘探井D09孔的探测数据为依据,结合地震剖面解释成果,分析了牛东断裂带内碳酸盐岩热储的空间展布特征、储集层物理性质与单井产能参数,并简述其对地热勘探的指导意义。探测结果表明,牛东断裂带的碳酸盐岩热储主要为蓟县系雾迷山组含硅质的白云岩,分布在断裂西侧基岩宽缓背斜顶部,层状稳定,厚约2000 m,顶板埋深1000~1200 m,井口水温约70℃,单井水量约102 m^(3)/h。D09孔揭示,在距风化壳顶部678 m的地层内共发育122个裂隙带,累计厚度达251.20 m,裂隙发育率37%,平均孔隙度9.26%,裂隙发育率与平均孔隙度明显比断裂带外地热井高出50%。D09孔与牛东断裂带周缘地热井的地层地温梯度、地热水水化学特征、储集层导水系数等对比分析表明,垂直断距达7000 m的牛东断裂带是一条导水导热的盆内隐伏型深断裂,其限定了雄安新区碳酸盐岩热储含水系统的东部边界,构成了西侧牛驼镇凸起的导水通道与东侧霸县凹陷油气运移的阻隔屏障,控制了牛驼镇凸起面积达1000 km 2的整装地热田的形成。
In Xiong'an New Area,because of prohibiting the exploitation of sandstone geothermal reservoir,it is of a great significance to find out the distribution position and the resources quality of the karst geothermal reservoir of the Niudong fault zone,as an eastern boundary of the karst geothermal resources,for the compilation of geothermal resources development and utilization planning and the layout of overall energy utilization.Based on the detection data of the D09 borehole,as the first exploration well for karst geothermal reservoir in the high-speed railway area of the Xiong'an New Area,and combined with the interpretation results of seismic sections,the spatial distribution characteristics,physical properties of reservoir and single well productivity parameters of the karst geothermal reservoir in the Niudong fault zone are analyzed,and its guiding significance for geothermal exploration is also summarized.The results show that the karst geothermal reservoir in the Niudong fault zone is mainly siliceous dolomite in the Wumishan Formation of the Jixian System,which is distributed at the top of the broad,gentle anticline of the bedrock on the west side of the fault,and is high quality geothermal heating utilization resource with the stable layers thickness of about 2000 m,the roof buried depth of 1000~1200 m,the geothermal water temperature of about 70℃and the single well production of about 102 m^(3)/h.There are 122 fractured karst zones in the strata of 678 m from the top of the weathering crust in the D09 borehole,with the total thickness of 251.20 m,the fracture ratio of 37%,and an average porosity of 9.26%.The fracture rate and average porosity are obviously 50%higher than those of the geothermal wells out of the fault zone.A comparative analysis of geothermal gradient of the strata,geochemical characteristics of geothermal water and water-conductivity of reservoir between the D09 hole and the geothermal wells around the Niudong fault zone shows that the Niudong fault zone with a vertical fault distance of 7000 m is a deep fault of water-conducting and thermal-conducting in the basin.The fault zone defines the eastern boundary of the karst water-bearing systems in the Xiong'an New Area,constitutes a water channel for the Niutuozhen uplift and a oil-gas migration barrier for Baxian depression,and results in formatting a complete geothermal field of the Niutuozhen uplift with an area of 1000 km 2.
作者
汪新伟
郭世炎
高楠安
刘慧盈
王婷灏
魏广仁
雷海飞
WANG Xinwei;GUO Shiyan;GAO Nan’an;LIU Huiying;WANG Tinghao;WEI Guangren;LEI Haifei(Sinopec Star Petroleum Co.Ltd.,Beijing 100083,China;Sinopec Green Energy Geothermal Development Co.Ltd.,Xiong’an 071800,Hebei,China)
出处
《地质通报》
CAS
CSCD
北大核心
2023年第1期14-26,共13页
Geological Bulletin of China
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》(编号:.JP19002)。
关键词
碳酸盐岩热储
储集层物性
单井产能
水文地质
牛东断裂带
雄安
carbonate geothermal reservoir
reservoir property
single well productivity parameters
hydrogeology
Niudong fault zone
Xiong’an
