油田长关低效井地热资源的开发与利用  

Development and Utilization of Geothermal Resources of Long-shut-in and Low-effi⁃ciency Wells in Oilfields

作　　者：周鑫艳 ZHOU Xinyan(Daqing Oilfield Design Institute Co.,Ltd.·State Key Laboratory of Continental Shale Oil)

机构地区：[1]大庆油田设计院有限公司·多资源协同陆相页岩油绿色开采全国重点实验室

出　　处：《油气田地面工程》2024年第10期61-67,共7页Oil-Gas Field Surface Engineering

摘　　要：在国家双碳目标的大背景下,油田大力发展清洁能源替代下的低碳生产路径,并充分开发利用油田独有的长关井地热资源,成为了重要的研究方向和实践领域。以海拉尔油田某作业区为研究对象,采用同轴换热改造技术及热泵技术,实现了该作业区周边长关井地热能的开发与利用。结合工艺设计及数学模型建立,对该作业区周边长关井地热资源进行了系统性评估,区域内岩热资源储量为18.6×10^(8)GJ,可采地热资源量为4.6×10^(8)GJ,折合标准煤约6320×10^(4)t。根据评估结果制定出相应的作业区供暖替代方案,将距生活区锅炉房1.5 km范围内的20口长关井改造成地热井,替代原有的燃油锅炉供暖,可节约原油1424 t/a,节约标煤1588.3 t/a,CO_(2)减排4399.5 t/a,节约运行费用301.5万元/a。在充分研究油田长关井综合性质的基础上,结合先进的地热能源开发技术,可以有效提高能源利用率并减少环境污染,对未来地热资源的开发与利用具有重要借鉴意义。Under the background of the national dual-carbon target,oilfields have actively developed low-carbon production paths through clean energy substitution,and fully utilizing the geothermal resources of long-shut-in wells,which are unique to oilfields,and has become an important research direction and practical field.Taking the operation area of a certain oilfield in Hailar as the research object,this paper uses the coaxial heat exchanger transformation technology and heat pump technology to realize the development and utilization of geothermal energy of the surrounding long-shut-in wells in the operation area.Combining process design and mathematical model establishment,the geothermal resources in the surrounding area of the operation area are systematically evaluated,with the regional rock heat resource reserves of 18.6×10^(8)GJ and recoverable geothermal resource volume of 4.6×10^(8)GJ,equivalent to about 6320×10^(4)t of standard coal.Based on the evaluation results,a corresponding operation area heating replacement scheme is formulated,converting 20 long-shut-in wells within 1.5 km of the living area boiler room into geothermal wells to replace the original fuel oil boiler heating,saving 1424 tons of crude oil per year,1588.3 tons of standard coal per year,reducing CO_(2)emissions by 4399.5 tons per year,and saving annual operating costs of 3.015 million yuan.In summary,by fully studying the comprehensive properties of long-shut-in wells in oilfields,and combining advanced geothermal energy development technologies,it is possible to effectively improve energy utilization efficiency and reduce environmental pollution.This study has important reference value for the future development and utilization of geothermal resources.

关 键 词：长关井 低效 地热 油田生产 开发利用 

分 类 号：TE34[石油与天然气工程—油气田开发工程] TK529[动力工程及工程热物理—热能工程]