摘要
页岩油储层低孔、低渗的特点使其在水平井和多级水力压裂初期开发后采收率仍不足10%,而注气吞吐是页岩油储层建立有效压力驱替体系及补充地层能量的重要方法,能够实现页岩油的有效增产。对CO_(2)、N_(2)、烃类气吞吐及辅助气体介质吞吐4种方式提高页岩油采收率的机理和采收率的主要影响因素进行了梳理;对比了不同注气介质的优缺点,总结了物理模拟实验方法、油藏数值模拟方法、优化算法三种注采参数优化研究手段的内涵及应用,及其优势与不足;展望了不同注气介质吞吐技术的发展趋势。以期为页岩油藏吞吐开发介质选择及注采参数优化方法选择提供参考。
Shale oil reservoirs,characterized by low porosity and low permeability,yield a recovery rate of less than 10%even after the implementation of horizontal wells and multi-stage hydraulic fracturing.The utilization of gas huff and puff technology can establish an effective pressure displacement system and supplement formation energy in these reservoirs,thereby achieving a substantial increase in shale oil production.The mechanism and main influencing factors of improving shale oil recovery through CO_(2),N_(2),hydrocarbon gas huff and puff,and auxiliary gas medium huff and puff were summarized.The advantages and disadvantages of different gas injection media were compared.It further delves into the implications and applications of three optimization study methods,along with their strengths and weaknesses,namely physical simulation experimental method,reservoir numerical simulation,and optimization algorithms.Lastly,the future trajectory of huff and puff technology with varying injection gases is explored to provide reference for medium selection of shale oil development and methods for parameter optimization.
作者
窦卓颖
杨正明
张亚蒲
刘莉
DOU Zhuoying;YANG Zhengming;ZHANG Yapu;LIU Li(University of Chinese Academy of Sciences School of Engineering Science,Beijing,101400,China;Institute of Porous Flow&Fluid Mechanics Chinese Academy of Sciences,Langfang,Hebei,065007,China;Research Institute of Petroleum Exploration&Development,Beijing,100083,China)
出处
《天然气与石油》
2023年第6期73-81,共9页
Natural Gas and Oil
基金
中国石油天然气股份有限公司科学研究与技术开发项目“典型低品位油藏渗流规律及提高采收率新方法研究”(2021DJ1102)
中国石油勘探开发研究院“页岩油开发机理和开发技术研究”(2022kt1001)。
关键词
页岩油
注气吞吐
提高采收率
Shale oil
Gas huff and puff
Enhanced oil recovery
