空气辅助蒸汽驱室内实验研究
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摘要
蒸汽驱是稠油油藏开发中使用较为普遍的提高采收率技术。目前大部分稠油开发区块进行蒸汽驱开发中后期,存在平面及层间矛盾,高温汽窜现象明显。蒸汽汽窜是制约提高稠油采收率的主要矛盾之一,此时如果不采取有效措施,蒸汽驱油效果会降低。针对此问题,为进一步提高稠油油藏蒸汽驱的开采效果,做了利用空气辅助蒸汽驱驱油的室内物理模拟实验,针对蒸汽空气注入比、段塞大小以及注入速率三个方面对空气辅助蒸汽驱油开发效果的影响进行了研究。研究结果表明:空气辅助蒸汽驱能够有效改善蒸汽驱效果,提高原油采收率。当空气与蒸汽的注入比为2∶1所取得的采收率最高,在此基础上空气与蒸汽的段塞大小为0.5 PV,注入速度为12～15 mL/h之间的汽驱效果最好。
Steam flooding is a widely used EOR technology in heavy oil reservoir development. At present, most heavy oil development blocks are in the middle and later stage of steam drive development, and there is intra-layer contradiction and interlayer contradiction, and the high temperature steam channeling phenomenon is obvious. Steam channeling is one of the main contradictions that restrict heavy oil recovery. If effective measures are not taken, the effect of steam flooding will be reduced. In order to improve the degree of recovery of heavy oil reservoirs, the study of air-assisted steam flooding was carried out. In this paper, the effect of steam-air injection ratio, slug volume and injection rate on the efficiency of air-assisted steam flooding was studied by laboratory physical simulation experiments. Research results showed that: air-assisted steam flooding effectively improved steam drive effect;when the injection ratio of air and steam was 2:1, the recovery ratio was the highest; at the same time, when air and steam slug volume was 0.5 PV, injection rate was 12 ～15 mL/h, steam flooding effect was the best.
Steam flooding is a widely used EOR technology in heavy oil reservoir development. At present, most heavy oil development blocks are in the middle and later stage of steam drive development, and there is intra-layer contradiction and interlayer contradiction, and the high temperature steam channeling phenomenon is obvious. Steam channeling is one of the main contradictions that restrict heavy oil recovery. If effective measures are not taken, the effect of steam flooding will be reduced. In order to improve the degree of recovery of heavy oil reservoirs, the study of air-assisted steam flooding was carried out. In this paper, the effect of steam-air injection ratio, slug volume and injection rate on the efficiency of air-assisted steam flooding was studied by laboratory physical simulation experiments. Research results showed that: air-assisted steam flooding effectively improved steam drive effect;when the injection ratio of air and steam was 2:1, the recovery ratio was the highest; at the same time, when air and steam slug volume was 0.5 PV, injection rate was 12 ～15 mL/h, steam flooding effect was the best.
引文
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[4]王文.蒸汽复合驱替机理研究及优化技术[J].化工管理,2017(31):196.
[5]于天忠.中深层超稠油油藏空气辅助蒸汽吞吐试验研究[J].特种油气藏,2013,20(05):77-80.
[6]张继平.齐40块蒸汽驱综合调控技术研究与应用[J].科技创新与应用,2012(28):40.
[7]孙焕泉,王敬,刘慧卿,等.高温蒸汽空气泡沫复合驱实验研究[J].石油钻采工艺,2011,33(6):83-87.
[8]孙国明,刘永建,赵法军,等.低渗透油田蒸汽复合驱实验研究[J].大庆石油地质与开发,2007,26(5):64-71.
[9]张旭,刘建仪,易洋,等.注气提高采收率技术的挑战与发展——注空气低温氧化技术[J].特种油气藏,2006,13(1):6-9.
[10]蒋有伟,张义堂,刘尚奇,等.低渗透油藏注空气开发驱油机理[J].石油勘探与开发,2010,37(4):471-476.
[11]王杰祥,徐国瑞,付志军,等.注空气低温氧化驱油室内实验与油藏筛选标准[J].油气地质与采收率,2008,15(1):69-71.
[12]唐晓东,崔盈贤,孟科全,等.注空气催化氧化渤海稠油降黏工艺可行性探讨[J].西南石油大学学报,2008,30(6):141-144.
[13]王杰祥,来轩昂,王庆,等.中原油田注空气驱油试验研究[J].石油钻探技术,2007,35(2):5-7.
[14]杨杰.CO2辅助蒸汽驱驱油效率实验研究[J].当代化工,2017,46(05):827-830.
[15]刘永建,邢二涛.肇源油田高温混合气驱油物理模拟实验研究[J].海洋石油,2008,28(04):55-58.
[16]孙国明,刘永建,赵法军,赵国,胡绍彬.低渗透油田蒸汽复合驱实验研究[J].大庆石油地质与开发,2007(05):64-67+71.
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