注采角度变化对驱油效率和微观剩余油的影响
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摘要
为了深入探究油藏条件(60℃)下水驱油开发过程中注采角度改变对驱油效率和微观剩余油的影响,文中利用微观可视化渗流物理模拟系统,真实模拟不同注采角度水驱油过程,定量和定性研究了改变注采角度对驱油效率和各类微观剩余油的影响。结果表明:注采角度的改变打破了原始渗流场压力平衡状态,使各类微观剩余油重新被动用,驱油效率显著提高,其中注采角度135°时,驱油效率提高11.69百分点,效果最佳;改变注采角度还可有效改变微观剩余油类型,将大量簇状和柱状剩余油转变为膜状和孤岛状剩余油,从而促进各类微观剩余油的剥离与渗流,大幅提高驱油效率。研究结果为油气田优选注采方向提供了技术支持和理论指导。
In order to further explore the effect of injection angle variation on the oil displacement efficiency and microscopic remaining oil after water flooding at temperature(60 °C), this paper uses the physical simulation system of microscopic visual seepage flow to realistically simulate different injection-production angle for water flooding. We analyze quantitatively and qualitatively the effect of the injection-production angle variation on the oil displacement efficiency and various types of microscopic remaining oil. The results show that change of injection-production angle breaks the pressure balance state of the original seepage field and makes all kinds of microscopic remaining oil reused, and the oil displacement efficiency is improved.When the injection-production angle is 135°, the oil displacement efficiency is improved by 11.69%, and the oil displacement effect is the best. In addition, changing the injection-production angle can also effectively change the remaining oil type,transforming a large number of clustered and columnar remaining oils into membranes and island remaining oils. The remaining oil promotes the stripping and seepage of all kinds of microscopic remaining oil and greatly increases the oil displacement efficiency. This paper provides some technical support and theoretical guidance to optimize the direction of injection and production in the development of oil and gas fields.
In order to further explore the effect of injection angle variation on the oil displacement efficiency and microscopic remaining oil after water flooding at temperature(60 °C), this paper uses the physical simulation system of microscopic visual seepage flow to realistically simulate different injection-production angle for water flooding. We analyze quantitatively and qualitatively the effect of the injection-production angle variation on the oil displacement efficiency and various types of microscopic remaining oil. The results show that change of injection-production angle breaks the pressure balance state of the original seepage field and makes all kinds of microscopic remaining oil reused, and the oil displacement efficiency is improved.When the injection-production angle is 135°, the oil displacement efficiency is improved by 11.69%, and the oil displacement effect is the best. In addition, changing the injection-production angle can also effectively change the remaining oil type,transforming a large number of clustered and columnar remaining oils into membranes and island remaining oils. The remaining oil promotes the stripping and seepage of all kinds of microscopic remaining oil and greatly increases the oil displacement efficiency. This paper provides some technical support and theoretical guidance to optimize the direction of injection and production in the development of oil and gas fields.
引文
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[21]贾忠伟,袁敏,张鑫璐,等.水驱微观渗流特征及剩余油启动机理[J].大庆石油地质与开发,2018,37(1):65-70.
[22]刘建仪,李牧,刘洋,等.注CO2吞吐微观机理可视化实验[J].断块油气田,2017,24(2):230-232.
[23]杜设明.聚合物驱替簇状残余油及其微观驱油规律研究[D].成都:西南石油大学,2016.
[24]陈琳.特高含水期微观剩余油启动条件及油膜变形机理研究[D].成都:西南石油大学,2017.
[25]李金丹,刘浩瀚,刘志斌,等.特高含水期油藏倾角及韵律性对油滴受力状态影响研究[J].石油天然气学报,2014,36(2):124-127.
[2]张莉,岳湘安,王友启.基于非均质大模型的特高含水油藏提高采收率方法研究[J].石油钻探技术,2018,46(5):83-89.
[3]王旭升,王朝丽.水驱油微观孔隙内流场分析[J].科学技术与工程,2012,12(21):5266-5269.
[4]周书院,陈雷,解立春,等.改变液流方向技术在安塞油田王窑区中高含水期措施挖潜中的应用[J].石油天然气学报,2007,29(3):423-425.
[5]李伟才,崔连训,赵蕊.水动力改变液流方向技术在低渗透油藏中的应用:以新疆宝浪油田宝北区块为例[J].石油与天然气地质,2012,33(5):796-801.
[6]刘志宏,鞠斌山,黄迎松,等.改变微观水驱液流方向提高剩余油采收率试验研究[J].石油钻探技术,2015,43(2):90-96.
[7]殷代印,房雨佳,辛勇亮.低渗透油藏改变驱替方向微观机理研究[J].特种油气藏,2017,24(3):59-63.
[8]朱维耀,田英爱,汪卫东,等.油藏内源乳化功能微生物对剩余油的微观驱替机理[J].中南大学学报(自然科学版),2016,47(9):3280-3288.
[9]于明旭,朱维耀,宋洪庆.低渗透储层可视化微观渗流模型研制[J].辽宁工程技术大学学报,2013,32(12):1646-1650.
[10]黄延章,于大森.微观渗流实验力学及其应用[M].北京:石油工业出版社,2001:14-17.
[11] SONG Z,ZHU W,SUN G,et al. Dynamic investigation of nutrient consumption and injection strategy in microbial enhanced oil recovery(MEOR)by means of large-scale experiments[J]. Applied Microbiology&Biotechnology,2015,99(15):6551-6561.
[12] AL-SHALABI E W, GHOSH B. Flow visualization of fingering phenomenon and its impact on waterflood oil recovery[J]. Journal of Petroleum Exploration&Production Technology,2017,8(5):1-12.
[13] ZHU W Y,ZHAO J X,HAN H Y,et al. High-pressure microscopic investigation on the oil recovery mechanism by in situ biogases in petroleum reservoirs[J]. Energy&Fuels,2015,29(12):7866-7874.
[14]朱维耀,夏小雪,郭省学,等.高温高压条件下油藏内源微生物微观驱油机理[J].石油学报,2014,35(3):528-535.
[15]于春磊,糜利栋,王川,等.水驱油藏特高含水期微观剩余油渗流特征研究[J].断块油气田,2016,23(5):592-594,598.
[16]丁帅伟,姜汉桥,席怡,等.特高含水期剩余油微观力学成因及孔道选择机理[J].辽宁石油化工大学学报,2018,38(1):45-49.
[17]刘丽丽,王立辉,杨树人,等.微孔道聚合物溶液驱替残余油变形研究[J].工程热物理学报,2018,39(2):348-354.
[18]孙雷,陈敏,桑頔,等.不同孔隙类型礁灰岩模型微观水驱渗流实验[J].断块油气田,2017,24(4):546-549.
[19]任江丽,朱玉双,刘林玉,等.鄂尔多斯盆地南梁西区长4+5油层组微观渗流特征及影响因素[J].石油实验地质,2017,39(6):805-811.
[20]殷代印,项俊辉,房雨佳.低渗透油藏微乳液驱微观剩余油驱替机理研究[J].特种油气藏,2017,24(5):136-140.
[21]贾忠伟,袁敏,张鑫璐,等.水驱微观渗流特征及剩余油启动机理[J].大庆石油地质与开发,2018,37(1):65-70.
[22]刘建仪,李牧,刘洋,等.注CO2吞吐微观机理可视化实验[J].断块油气田,2017,24(2):230-232.
[23]杜设明.聚合物驱替簇状残余油及其微观驱油规律研究[D].成都:西南石油大学,2016.
[24]陈琳.特高含水期微观剩余油启动条件及油膜变形机理研究[D].成都:西南石油大学,2017.
[25]李金丹,刘浩瀚,刘志斌,等.特高含水期油藏倾角及韵律性对油滴受力状态影响研究[J].石油天然气学报,2014,36(2):124-127.