正韵律油藏聚合物驱后泡沫驱超覆作用研究
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摘要
为研究正韵律油藏聚合物驱后开展低张力泡沫驱的可行性,以正韵律油层发育的双河油田北块Ⅳ1-3层系为目标,采用数值模拟和室内物模实验方法研究了低张力泡沫驱超覆作用机理。结果表明,低张力泡沫驱存在超覆作用,可较好地动用采出程度较差的正韵律油藏顶部剩余油,超覆作用对提高采收率贡献占比为13.94%。实验结果进一步明确了低张力泡沫驱适宜的油藏条件,为区块筛选提供了参考。
In order to determine the feasibility of low-tension foam-flooding in the positive-rhythm reservoir after polymer-flooding,the IV1-3 layer-series in the north block of Shuanghe Oilfield with well-developed positive-rhythm reservoirs is taken to research the overlapping mechanism of low-tension foal-flooding by numerical simulation and laboratory physical simulation. Research indicates that low-tension foam-flooding with overlapping effect could effectively displace the remaining oil with relatively low recovery degree in the top of positive-rhythm reservoir. The overlapping effect could contribute 13. 94% to the enhanced oil recovery. Laboratory experiment further clarify the appropriate reservoir conditions for low-tension foal-flooding,which could provide certain reference for block optimization.
In order to determine the feasibility of low-tension foam-flooding in the positive-rhythm reservoir after polymer-flooding,the IV1-3 layer-series in the north block of Shuanghe Oilfield with well-developed positive-rhythm reservoirs is taken to research the overlapping mechanism of low-tension foal-flooding by numerical simulation and laboratory physical simulation. Research indicates that low-tension foam-flooding with overlapping effect could effectively displace the remaining oil with relatively low recovery degree in the top of positive-rhythm reservoir. The overlapping effect could contribute 13. 94% to the enhanced oil recovery. Laboratory experiment further clarify the appropriate reservoir conditions for low-tension foal-flooding,which could provide certain reference for block optimization.
引文
[1]王敬,刘慧卿,王增林,等.稠油油藏热力泡沫复合驱数值模拟研究[J].特种油气藏,2011,18(5):75-78.
[2]樊泽霞,李玉英,丁长灿,等.聚合物对泡沫稳定性的影响研究[J].特种油气藏,2013,20(6):102-104.
[3]田荣焕,范明,段秋红,等.双河油田提高采收率的实践与认识[J].石油天然气学报(江汉石油学院学报),2009,31(2):334-335.
[4]谈馨,曾德伟,侯雪樱,等.双河油田Ⅳ1-3层系聚合物驱吸水剖面变化特征分析[J].石油地质与工程,2015,29(1):95-97.
[5]侯健,李振泉,杜庆军,等.多孔介质中流动泡沫结构图像的实时采集与定量描述[J].石油学报,2012,33(4):658-662.
[6]杨昌华,王庆,董俊艳,等.高温高盐油藏CO2驱泡沫封窜体系研究与应用[J].石油钻采工艺[J],2012,34(5):95-97.
[7]王增林,王其伟.强化泡沫驱油体系性能研究[J].石油大学学报(自然科学版),2004,28(3):49-51.
[2]樊泽霞,李玉英,丁长灿,等.聚合物对泡沫稳定性的影响研究[J].特种油气藏,2013,20(6):102-104.
[3]田荣焕,范明,段秋红,等.双河油田提高采收率的实践与认识[J].石油天然气学报(江汉石油学院学报),2009,31(2):334-335.
[4]谈馨,曾德伟,侯雪樱,等.双河油田Ⅳ1-3层系聚合物驱吸水剖面变化特征分析[J].石油地质与工程,2015,29(1):95-97.
[5]侯健,李振泉,杜庆军,等.多孔介质中流动泡沫结构图像的实时采集与定量描述[J].石油学报,2012,33(4):658-662.
[6]杨昌华,王庆,董俊艳,等.高温高盐油藏CO2驱泡沫封窜体系研究与应用[J].石油钻采工艺[J],2012,34(5):95-97.
[7]王增林,王其伟.强化泡沫驱油体系性能研究[J].石油大学学报(自然科学版),2004,28(3):49-51.