鄂尔多斯盆地延长油气区地热资源赋存特征及开发利用建议  

Occurrence Characteristics and Exploitation of Geothermal Resources in Yanchang Oil and Gas Area of Ordos Basin

作　　者：白奋飞 魏登峰 韩伟[2] 王菲菲 BAI Fenfei;WEI Dengfeng;HAN Wei;WANG Feifei(Reseach Institute of Yanchang Petroleum(Group)Co.Ltd,Xi’an 710065,Shaanxi,China;Xi’an Center of China Geological Survey,Xi’an 710119,Shaanxi,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710065 [2]中国地质调查局西安地质调查中心,陕西西安710119

出　　处：《西北地质》2023年第6期329-339,共11页Northwestern Geology

基　　金：陕西省重点研发项目“延长油气区大地热流调查与地温场分布研究”(2018GY-090);国家自然科学基金重点项目“鄂尔多斯、沁水沉积盆地中生代晚期古地温场对岩石圈动力学演化及油气赋存的约束作用”(41630312)资助。

摘　　要：鄂尔多斯盆地蕴含丰富的中低温地热能源,通过对其中延长油气区地热资源赋存状态研究,发现区内主要有西部白垩系碎屑岩和东部石炭系—侏罗系碎屑岩两套热储层;岩石热导率与地层岩石的成岩程度、孔隙度等关系密切;地温梯度为2.73~3.50℃/100m,整体显示北高南低,与地层埋深呈正相关;大地热流值为57.28~86.18mW/m^(2),具有明显的东西向展布特征。综合分析认为:区内地热资源东部优于西部,可具体划分浅层低温有利区、中层中低温有利区和中深层中温有利区等3类地热资源有利区。结合油田地热资源开发利用实例,认为对这些有利区内的废弃井加以改造利用,可降低地热开发工程成本,在地热发电、工业利用及三产养殖等方面实现地热资源梯级利用,有望建立“源网荷储一体化”的能源互联网构架。Ordos Basin is rich in geothermal energy at moderate and low temperature.By studying the occurrence state of geothermal resources in Yanchang oil and gas area,it is found that there are mainly two sets of thermal reservoirs:Cretaceous clastic rocks in the west and Carboniferous and Jurassic clastic rocks in the east;The thermal conductivity of rock is closely related to the degree of diagenesis and porosity of formation rock;The geothermal gradient is 2.73-3.50℃/100 m,which is higher in the north and lower in the south;The earth heat flow value is 57.28-86.18 mW/m^(2),with obvious east-west distribution characteristics.The comprehensive analysis shows that the geothermal resources in the eastern part of the region are better than those in the western part,and can be divided into three types:shallow low temperature favorable area,middle-low temperature fa-vorable area and middle-deep medium temperature favorable area.Combined with the exploitation and utilization examples of geothermal resources in oil fields,it is considered that the transformation and utilization of abandoned Wells in these favorable areas can reduce the cost of geothermal development projects and realize the stepwise utilization of geothermal resources in geothermal power generation,industrial utilization and three-production and aquaculture,it is expected to establish an energy internet framework of"Source network load storage integration".

关 键 词：鄂尔多斯盆地 延长油气区 地热 废弃井利用 清洁能源 

分 类 号：P962[天文地球—自然地理学]