摘要
地热能作为一种稳定持续的清洁能源,未来将对中国能源结构转型及“双碳”目标实现发挥重要作用。鄂尔多斯盆地内地热资源丰富,但其储量及分布特征尚不明确,勘查开发程度总体较低。以长庆油田及周边区域为研究区,在成井资料的基础上,分析了区内地热地质特征,应用单元容积法估算了地热资源储量,并根据地热资源开发利用潜力进行分区。研究表明:区内地层构造相对简单,地温梯度介于2.2~3.0℃/hm,主要热储为传导型中生界砂岩热储,除洛河组外,其他热储层富水性较差;区内地热资源呈西高东低分布,总量为79.91×10^(17)kJ,可采量为6.39×10^(17)kJ,地热流体储量为2.47×10^(12)m^(3);区内红柳沟镇—大水坑—姬村—山城区块、张沟门—流曲镇—三岔镇区块和庆阳市附近区块地热资源开发潜力较大,可以优先考虑将废弃油气井改造,建设中深层套管式换热系统进行开发利用。
Geothermal energy,as a stable and sustainable clean energy source,is set to play a crucial role in China's energy structure transformation and the realization of the“double carbon”goal in the future.The Ordos Basin,noted for its abundant geothermal resources,still holds much untapped potential due to incomplete understanding of its reserves and distribution characteristics,and the relatively low level of exploration and development.Focusing on the Changqing Oilfield and its surrounding areas,the study delves into the geothermal geological characteristics using well data.It employs the unit volume method to estimate the geothermal resource reserves and conducts zoning based on the development and utilization potential of these resources.The study reveals that the formation structure in the area is relatively straightforward,with a general geothermal gradient of 2.2~3.0℃/hm.The primary thermal reservoir consists of conductive Mesozoic sandstone,while other thermal reservoirs,except for Luohe Formation,exhibit poor water yield.The geothermal resources in the region are distributed with higher concentrations in the western areas and lower in the east,with a total amount of 79.91×10^(17)kJ.Among this a recoverable capacity of 6.39×10^(17)kJ,and a geothermal fluid reserve of 2.47×10^(12)m^(3)have been identified Blocks such as Hongliugou-Dashuikeng-Jicun-Shancheng block,Zhanggoumen-Liuquzhen-Sanchazhen block and the block near Qingyang exhibit significant potential for geothermal resource development.Therefore,the study recommends prioritizing the redevelopment of abandoned oil and gas wells,alongside the construction of medium and deep casing heat exchange systems.This approach would facilitate the effective development and utilization of geothermal resources in these areas.
作者
郭路
夏岩
段晨阳
高文冰
陈凯
侯亚云
郭鸿
GUO Lu;XIA Yan;DUAN Chenyang;GAO Wenbing;CHEN Kai;HOU Yayun;GUO Hong(Research Institute of Petroleum Exploration and Development,Changqing Oilfield Company,PetroChina,Xi'an,Shaanxi 710018,China;National Engineering Laboratory of Exploration and Development for Low Permeability Oil and Gas Fields,Xi'an,Shaanxi 710018,China;Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center,Xi'an,Shaanxi 710068,China;Shaanxi Engineering Technology Research Center for Urban Geology and Underground Space,Xi'an,Shaanxi 710068,China)
出处
《油气藏评价与开发》
CSCD
2023年第6期749-756,共8页
Petroleum Reservoir Evaluation and Development
关键词
油田地热
储层温度分布特征
地热资源储量
单元容积法
废弃油气井改造
oilfield geothermal
reservoir temperature distribution characteristics
geothermal resource reserves
unit volume method
renovation of abandoned oil and gas wells
