摘要
基于区域地质、二维地震和131口地热井等资料,分析雄安新区热储—热盖层组合、热盖层特征和岩溶热储内幕3个地质关键要素,进行有利区带优选。结果表明:雄安新区发育2种热储—热盖层组合,新近系—蓟县系雾迷山组组合,发育于热储顶面埋深小于1500 m的容城和牛驼镇凸起;古近系—蓟县系雾迷山组组合,发育于热储顶面埋深大于1500 m的牛北斜坡。新近系砂岩热盖层成岩作用较弱,热储和热盖层接触不稳定,凸起区埋深为450~700、800~1000 m的厚层疏松砂岩层段更易发生井壁失稳坍塌事故。热储内幕具有纵向分层、平面分带特征。潜山岩溶作用控制优质热储的形成,Ⅰ类、Ⅱ类热储主要发育于距雾迷山组顶部不整合面350 m范围;地热井取水层段优化厚度由西向东逐渐变小,容城凸起厚度为1000 m,牛北斜坡厚度为880 m,牛驼镇凸起厚度为500 m。容城和牛驼镇凸起周缘热储顶面埋深为1250~1500 m区带,热储埋藏适中、储层物性好,热盖层成岩作用强、钻井风险小,是最有利的勘探开发区。该结果可为雄安新区岩溶热储地热井的成功钻探和地热资源的有效开发提供指导。
Based on the regional geological background,2D seismic data and 131 wells loggings,three key geological factors,including reservoir-caprock assemblage,caprock characteristics and karst geothermal reservoir characteristics were studied in detail,and comprehensive evaluation of favorable zones was carried out.The results show that two reservoir-caprock assemblage patterns are identified,the Eogene Jx w is distributed on the northern slope belt of the Niutuozhen Bulge,where the top surface burial depth of Jx w is below 1500 m,and the Neocene Jx w is distributed on the Niutuozhen Bulge and the Rongcheng Bulge,where the top surface burial depth of Jx w is above 1500 m.The Neocene caprock has poor diagenesis and is unstable.As a result,borehole wall sloughing is more likely to occur in thick poorly-cemented sandstone intervals of the Niutuozhen Bulge and the Rongcheng Bulge,which is mainly developed in the depth range of 450-700 m and 800-1000 m.The geothermal reservoir property is in the longitudinal and horizontal zonation.Burial-hill-type karstification controls the formation of high quality reservoirs of Jx w in Xiong'an Area,and first grade and second grade geothermal reservoirs mainly developed within a thickness of 350 m.The optimized thickness of production zone decreases from the Rongcheng Bulge to the northern slope belt of the Niutuozhen Bulge to the Niutuozhen Bulge,the results are 1000 m,880 m,and 500 m,respectively.The area of Rongcheng Bulge and Niutuozhen Bulge with top reservoir surface burial depth of 1250-1500 m is the most favorable exploration and development zone because of the moderate burial of the thermal reservoir,better reservoir property,stronger diagenesis,and less drilling risk.The results can provide guidance for the successful drilling of karst geothermal reservoirs and the effective development of geothermal resources in Xiong'an Area.
作者
刘慧盈
汪新伟
毛翔
张海雄
王强
罗璐
王迪
吴陈冰洁
王婷灏
LIU Huiying;WANG Xinwei;MAO Xiang;ZHANG Haixiong;WANG Qiang;LUO Lu;WANG Di;WU Chenbingjie;WANG Tinghao(Research Institute of Petroleum Exploration and Development,PetroChina,Bejing 100083,China;New Energy Research Institute,SINOPEC Star Petroleum Company Limited(Beijing),Beijing 100083,China;New Energy Research Institute,SINOPEC Star Petroleum Company Limited(Beijing),Zhenghou,Henan 450000,China;Overseas Audit Center,Audit Department,SINOPEC,Beijing 100083,China)
出处
《东北石油大学学报》
CAS
北大核心
2021年第4期69-81,I0005,I0006,共15页
Journal of Northeast Petroleum University
基金
中国石油化工股份有限公司重点科技项目(JKL18033)
中国石化集团重点科技项目(JP19002)。
