华南下扬子区现今地温场特征  

Present geothermal regime of the Lower Yangtze area,South China

作　　者：王华玉[1,2] 刘绍文[1,2] 雷晓[1,2] 

机构地区：[1]南京大学海岸与海岛开发教育部重点实验室,江苏南京210093 [2]南京大学地理与海洋科学学院,江苏南京210093

出　　处：《煤炭学报》2013年第5期896-900,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划国家(973)资助项目(2012CB214703);国家自然科学基金资助项目(41272143);教育部新世纪优秀人才支持计划资助项目(NCET-12-0263)

摘　　要：在前人研究成果的基础上,整合了新近获取的地温数据,基于下扬子区66口钻井的试油温度数据及岩石热物性参数资料,分析了该区现今地温梯度、大地热流及1 000~5 000 m埋深处的地层温度的分布特征。研究表明：该区大部分的现今地温梯度为18~25℃/km,其中,苏北盆地地温梯度较高（平均为30℃/km）;全区现今大地热流为48~80 mW/m2,平均为60 mW/m2,与全球大陆区平均热流相当。深部地层温度估算指出,该区北部4 000 m埋深处的温度已达150℃,区内主要古生界海相烃源岩层系目前为高-过成熟的生气阶段,具有适宜页岩气保存的温度条件。Authors combined the previous data and newly collected geothermal data,including temperature and rock thermal properties,to obtain present geothermal gradient,subsurface formation temperature at the depths of 1 000-5 000 m and the heat flow in the region.The results show that the present geothermal gradient of the Lower Yangtze area is 18-25 ℃/km,while that of the Subei Basin is as high as 30 ℃/km,and the heat flow ranges from 48 mW/m2 to 80 mW/m2 with a mean of 60 mW/m2,approximating to that of the global continental areas.The prediction of deep subsurface formation temperature indicates that the formation temperature of the northern area is larger than 150 ℃ at 4 000 m depth,and the main Paleozoic marine hydrocarbon rocks are within high-over mature regime and the gas generation stage,suggesting this area is of suitable temperature condition for shale gas preservation.

关 键 词：地温梯度 大地热流 地层温度 页岩气 下扬子地区 

分 类 号：P618.13[天文地球—矿床学]