浅层边水断块油藏氮气复合吞吐实验
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赵凤兰(1973—),女,山东商河人,副教授,博士,从事提高采收率与采油化学相关的科研和教学工作。联系电话:13683639583, E-mail:zhfl@cup.edu.cn。

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国家科技重大专项“低渗致密油藏高效提高采收率新技术”(2016ZX05009-004)和“海外重点油气田开发钻采关键技术” (2017ZX05032-004)。


Experiment of nitrogen compound huff and puff for fault-block reservoirs with shallow edge water
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    摘要:

    浅层边水断块油藏由于含油面积小、非均质性强、黏度高以及开发过程中存在边水突进快等问题,氮气吞吐可有效补充地层能量,具有控抑边水突进的潜力。通过采用高温高压边水径向流模型对氮气、氮气-表面活性剂和氮气-二氧化碳3种吞吐介质控水增油可行性进行室内实验研究,以吞吐阶段含水率最大降低值、控水持续时间和采收率提高程度为指标,并结合模型压力变化对3种吞吐介质控水增油效果进行评价和对比,并在此基础上分别分析3种吞吐介质控水增油机理。结果表明,3种吞吐介质均能控抑边水;氮气吞吐控抑边水能力最强,但氮气的驱油效率低,增油效果较差;而氮气复合吞吐在实现控抑边水的基础上,通过表面活性剂和二氧化碳提高了驱油效率,增油效果优于氮气吞吐。

    Abstract:

    The strong heterogeneity and high viscosity of crude oil in shallow fault-block reservoirs with small oil content lead to a rapid edge water coning problem during the production. The N2 huff and puff has the potential of controlling edge water coning since the N2 can supply the power of the reservoir. Therefore,the feasibility of N2/N2-surfactan/N2-CO2 huff and puff for controlling the edge water coning and enhancing oil recovery was studied in laboratory by the radial flow model with edge water at high temperature and high pressure. The factors including maximum reduction of water cut,water control duration,and increase of oil recovery were selected to evaluate and compare the effect of controlling the water coning and improving oil production and to analyze the mechanism of controlling edge water coning and improving oil production at different pressures. The results show that:N2/N2-surfactant/N2-CO2 huff and puff all have the ability of controlling edge water coning;the N2 huff and puff has the best ability of controlling water coning,but has the least ability of improving oil production with a low displacement efficiency;the N2 compound huff and puff has the ability of controlling edge water coning,and has the better ability of improving oil production than N2 huff and puff with the surfactant and CO2 to improve the oil displacement efficiency.

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赵凤兰,宋黎光,侯吉瑞,李文峰,王鹏,郝宏达.浅层边水断块油藏氮气复合吞吐实验[J].油气地质与采收率,2019,26(3):85~91

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  • 在线发布日期: 2019-07-23