高注入倍数油水两相渗流特征研究
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摘要
为了研究特高含水期油藏油水两相渗流特征,开展了高注入倍数(200 PV)水驱油实验,对比分析了不同渗透率、不同注入倍数、不同注入速度对驱油效率的影响。实验结果表明,高注入倍数下,油相渗透率缓慢下降,水相渗透率大幅增加,水驱特征曲线出现上翘的"拐点","拐点"之后,耗水量急剧增加;渗透率越大驱油效率越高;提高注入速度可以提高驱油效率。该研究成果为特高含水期油藏高效开发提供了实验依据。
In order to study the characteristics of oil-water two-phase seepage in a reservoir at a very high water-cut stage, a water flooding experiment with a high injection multiple(200 PV) was carried out. The effects of different permeability, different injection ratio and different injection speed on oil displacement efficiency were compared and analyzed. The experimental results show that under the condition of high injection ratio, the permeability of oil phase decreases slowly, the permeability of water phase increases greatly. The water drive characteristics curve appears upturned 'inflection point'. After the inflection point,the water consumption increases sharply. The higher the permeability, the higher the oil displacement efficiency. Increasing the injection speed can improve the oil displacement efficiency. The research results provide an experimental basis for the efficient development of the reservoirs in extra high water-cut stage.
In order to study the characteristics of oil-water two-phase seepage in a reservoir at a very high water-cut stage, a water flooding experiment with a high injection multiple(200 PV) was carried out. The effects of different permeability, different injection ratio and different injection speed on oil displacement efficiency were compared and analyzed. The experimental results show that under the condition of high injection ratio, the permeability of oil phase decreases slowly, the permeability of water phase increases greatly. The water drive characteristics curve appears upturned 'inflection point'. After the inflection point,the water consumption increases sharply. The higher the permeability, the higher the oil displacement efficiency. Increasing the injection speed can improve the oil displacement efficiency. The research results provide an experimental basis for the efficient development of the reservoirs in extra high water-cut stage.
引文
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[2]徐正顺,王凤兰,张善严,等.喇萨杏油田特高含水期开发调整技术[J].大庆石油地质与开发,2009,28(5):76–82.
[3]刘丽杰.胜坨油田特高含水后期矢量开发调整模式及应用[J].油气地质与采收率,2016,23(3):111–115.
[4]束青林,张本华,毛卫荣,等.孤岛油田特高含水期提高采收率技术措施及效果[J].油气地质与采收率,2009,16(5):52–55.
[5]王继强,岳圣杰,宋瑞文,等.特高含水期油田水驱特征曲线优化研究[J].特种油气藏,2017,24(5):97–101.
[6]范海军,朱学谦.高含水期油田新型水驱特征曲线的推导及应用[J].断块油气田,2016,23(1):105–108.
[7]薛睿.影响水驱油田特高含水期采收率的主要因素[J].西安石油大学学报(自然科学版),2017,32(6):99–104.
[8]张霞,潘彦珍,柏世斌,等.双河油田Ⅵ油组剩余油分布及井网综合调整研究[J].西安石油大学学报(自然科学版),2012,27(4):72–76.
[9]邴绍献.基于特高含水期油水两相渗流的水驱开发特征研究[D].四川成都:西南石油大学,2013.
[10]侯晓春,王雅茹,杨清彦.一种新的非稳态法油水相对渗透率曲线计算方法[J].大庆石油地质与开发,2008,27(4):54–56.
[11]周凤军,刘忠焱,张彩霞.稳态法测定油水相对渗透率的实用方法[J].石油地质与工程,2009,23(2):105–109.
[12]李丽丽,宋考平,高丽,等.特高含水期油田水驱规律特征研究[J].石油钻探技术.2009,37(3):91–94.
[13]张金庆,孙福街.相渗曲线和水驱曲线与水驱储量的关系[J].新疆石油地质,2010,31(6):50–58.
[14]张继成,宋考平.相对渗透率特征曲线及其应用[J].石油学报,2007,28(4):104–107.
[15]SILPNGARMLERSN, GULERB, ERTEKINT, et al. Development and testing of two–phaserelative permeability predictor susingartificial neural networks[J].SPE Journal,2002,7(3):299–308.
[16]计秉玉,李莉,李群.不同类型储层驱替速度对提高原油采收率的影响[J].石油学报,2004,25(3):58–61.
[17]魏斌,张友生,杨贵凯,等.储集层流动单元水驱油实验研究[J].石油勘探与开发,2002,29(6):72–74.