注采井数比对抚顺油页岩注高温氮气原位转化开采的影响  

Influences of injection-production wells ratio on in-situ conversion production of high-temperature nitrogen injection in Fushun oil shale

作　　者：厉家宗 朱超凡 徐绍涛 董光顺 郭威[1,2,3,4] LI Jiazong;ZHU Chaofan;XU Shaotao;DONG Guangshun;GUO Wei(School of Construction Engineering,Jilin University,Changchun 130026,China;National and Local Joint Engineering Laboratory of Oil Shale In-situ Conversion and Drilling Technology,Jilin University,Changchun 130026,China;Ministry of Education Shales Oil and Gas Resources Exploration and Development Provincial Co-established Collaborative Innovation Center,Jilin University,Changchun 130026,China;Ministry of Natural Resources Key Laboratory of Complex Drilling and Mining Technology,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]吉林大学油页岩地下原位转化与钻采技术国家地方联合工程实验室,吉林长春130026 [3]吉林大学教育部页岩油气资源勘探开发省部共建协同创新中心,吉林长春130026 [4]吉林大学自然资源部复杂条件钻采技术重点实验室,吉林长春130026

出　　处：《断块油气田》2023年第5期743-750,共8页Fault-Block Oil & Gas Field

基　　金：国家重点研发计划项目课题“油页岩原位转化高效加热方法”(2019YFA0705502);吉林大学高层次科技创新团队建设项目(2020TD-05);吉林省中青年科技创新卓越团队项目“油页岩原位转化关键技术科技创新团队”(20220508135RC);吉林省发展和改革委员会自主创新能力建设项目“油页岩地下原位转化与钻采技术国家地方联合工作室自主创新能力建设”(2022C021)。

摘　　要：油页岩原位转化技术是油页岩工业的发展趋势,注高温氮气是一种对流加热油页岩地下原位转化开采技术,具有工艺简单、安全环保、加热效率高、经济效益好等优点。文中以抚顺油页岩为研究对象,运用数值模拟方法,研究了油页岩注高温氮气原位转化过程,并分析了常规油气田开采5种布井方式对应的注采井数比对开发效果的影响。结果表明:常规油气田开采中,以注采井数比1∶1为界,增大注采井数比有利于缩短生产时间,减小注采井数比有利于增大能量效率;注采井数比为1∶3或1∶2时,油气产量受到生产井处地层渗透率、孔隙度变化的影响,生产过程出现2个峰值;通过对比不同布井方式,注采井数比为1∶2的反七点井网法单位体积产油量最大,能量效率最大为56%,开采效果最优。该研究成果为油页岩注氮气原位开采的现场应用提供参考。In-situ conversion technology of oil shale is the development trend of oil shale industry.High-temperature nitrogen injection is a a production technology using convective heating to promote in-situ conversion of oil shale,which has the advantages of simple process,safety and environmental protection,high heating efficiency and good economic benefits.In this study,the Fushun oil shale was used as the research object,and the in-situ conversion of high-temperature nitrogen injection into the oil shale was studied using numerical simulation methods,the influences of injection-production wells ratio of five kinds of well pattern on development effects in conventional oil and gas fields were analyzed.The results show that in conventional oil and gas fields,with the injection-production wells ratio limit of 1∶1,increasing the ratio is beneficial to shortening production time,and decreasing the ratio is beneficial to increasing energy efficiency.When the injection-production wells ratio is 1∶3 or 1∶2,the production of oil and gas is affected by the change of formation permeability and porosity at the production wells,and two peaks appear in the production process.By comparing different well patterns,the inverse seven-spot well pattern method with injection-production wells ratio of 1:2 has the highest oil production per unit volume,which has the highest energy efficiency of 56%and the best recovery effect.This study provides a reference for the field application of nitrogen injection in-situ production of oil shale.

关 键 词：油页岩 高温氮气 原位转化 布井方式 注采井数比 

分 类 号：TD83[矿业工程—煤矿开采]