稠油油藏三元复合驱参数优化实验研究
|
摘要
针对扶北2稠油区块在蒸汽驱过程中采收率低、见效差的问题,提出了减氧空气+高温泡沫剂+蒸汽三元复合驱方案,并对其进行参数优化研究。通过优选出的最佳注入参数,采取并联三管填砂模型模拟地层纵向非均质性,对该三元复合驱采收率进行研究。结果表明,在渗透率级差为3.20,高温泡沫气液比为1∶1,以混合注入的方式,最佳泡沫剂注入量为0.25倍孔隙体积,水驱至含水率为50%,回压为5 MPa时,减氧空气+高温泡沫剂+蒸汽三元复合驱最终采收率为63.8%,比蒸汽驱采收率提高了28.9个百分点。研究认为,通过减氧空气+高温泡沫剂+蒸汽三元复合驱能有效地抑制汽窜,使中、低渗储层原油动用程度增大。该项研究为同类稠油油藏进一步提高原油采收率提供了借鉴。
The steam flooding in the heavy oil reservoirs of Fubei 2 Block is poor in application effect with low recovery factor. To solve these problems,ASP flooding scheme of oxygen-reducing air,high temperature foam and steam was proposed and the related parameter optimization was studied. Then,based on the selected optimal injection parameters,the vertical heterogeneity of strata was simulated in the sand packed model with three tubes in parallel and the recovery factor of ASP flooding was investigated. It is shown that the ultimate recovery factor of ASP flooding of oxygen-reducing air,high temperature foam and steam is 63. 8% which is 28. 9 percentages higher than that of steam flooding when combination injection is carried out,the permeability contrast is 3. 20,the gas/liquid ratio of high temperature foam is 1 ∶ 1,the optimal foam agent injection is 25% pore volume,water cut of water flooding is 50% and back pressure is 5 MPa. It is concluded that ASP flooding of oxygen-reducing air,high temperature foam and steam can inhibit steam channeling effectively and increase the oil producing degree of moderate and low permeability reservoirs. The research can be used as the reference for enhancing the recovery factor of similar heavy oil reservoirs.
The steam flooding in the heavy oil reservoirs of Fubei 2 Block is poor in application effect with low recovery factor. To solve these problems,ASP flooding scheme of oxygen-reducing air,high temperature foam and steam was proposed and the related parameter optimization was studied. Then,based on the selected optimal injection parameters,the vertical heterogeneity of strata was simulated in the sand packed model with three tubes in parallel and the recovery factor of ASP flooding was investigated. It is shown that the ultimate recovery factor of ASP flooding of oxygen-reducing air,high temperature foam and steam is 63. 8% which is 28. 9 percentages higher than that of steam flooding when combination injection is carried out,the permeability contrast is 3. 20,the gas/liquid ratio of high temperature foam is 1 ∶ 1,the optimal foam agent injection is 25% pore volume,water cut of water flooding is 50% and back pressure is 5 MPa. It is concluded that ASP flooding of oxygen-reducing air,high temperature foam and steam can inhibit steam channeling effectively and increase the oil producing degree of moderate and low permeability reservoirs. The research can be used as the reference for enhancing the recovery factor of similar heavy oil reservoirs.
引文
[1]栾海波.松辽盆地永平油田油藏开发地质与开发部署研究[D].四川:成都理工大学,2011.
[2]刘文章.稠油注蒸汽热采工程[M].北京:石油工业出版社,1997:11.
[3]范治成,刘慧卿,张红玲,等.井楼油田稠油油藏氮气泡沫调剖室内实验[J].石油钻采工艺,2009,31(2):74-78.
[4]周鹰,宋阳,孙洪安,等.稠油油藏转蒸汽驱开采的特殊性分析[J].特种油气藏,2009,16(2):62-66.
[5]王其伟,郭平,周国华,等.泡沫体系封堵性能影响因素实验研究[J].特种油气藏,2003,10(3):79-81.
[6]刘伟,李兆敏,李松岩.非均质地层泡沫调驱提高采收率实验[J].石油化工高等学校学报,2011,24(5):26-29.
[7]宫俊峰,曹嫣镔,唐培忠,等.高温复合泡沫体系提高胜利油田稠油热采开发效果[J].石油勘探与开发,2006,33(2):212-216.
[8]骆铭,王海涛,吕成远,等.泡沫剂/驱油剂辅助蒸汽驱技术室内实验[J].应用化工,2015,44(11):1988-1991.
[9]李德儒,庞占喜.热力泡沫改善稠油油藏蒸汽驱开发效果[J].特种油气藏,2016,23(5):89-92.
[10]吴正彬,刘慧卿,庞占喜,等.稠油氮气泡沫辅助蒸汽驱可视化实验研究[J].特种油气藏,2016,23(5):126-129.
[11]林伟民,史江恒,肖良,等.中高渗油藏空气泡沫调驱技术[J].石油钻采工艺,2009,31(增刊1):115-118.
[12]张瀚奭,郑家朋,张立民,等.高浅北区稠油油藏空气泡沫驱实验[J].油田化学,2014,31(4):527-530.
[13]李玥洋.低氧空气泡沫驱应用基础及数值模拟研究[D].四川:西南石油大学,2014.
[14]郑强,刘慧卿,高超,等.浅层特稠油油藏氮气泡沫驱主控因素分析[J].特种油气藏,2015,22(1):137-140.
[15]周根荣.蒸汽氮气泡沫调驱实验研究[J].科学技术与工程,2012,12(6):1393-1396.
[2]刘文章.稠油注蒸汽热采工程[M].北京:石油工业出版社,1997:11.
[3]范治成,刘慧卿,张红玲,等.井楼油田稠油油藏氮气泡沫调剖室内实验[J].石油钻采工艺,2009,31(2):74-78.
[4]周鹰,宋阳,孙洪安,等.稠油油藏转蒸汽驱开采的特殊性分析[J].特种油气藏,2009,16(2):62-66.
[5]王其伟,郭平,周国华,等.泡沫体系封堵性能影响因素实验研究[J].特种油气藏,2003,10(3):79-81.
[6]刘伟,李兆敏,李松岩.非均质地层泡沫调驱提高采收率实验[J].石油化工高等学校学报,2011,24(5):26-29.
[7]宫俊峰,曹嫣镔,唐培忠,等.高温复合泡沫体系提高胜利油田稠油热采开发效果[J].石油勘探与开发,2006,33(2):212-216.
[8]骆铭,王海涛,吕成远,等.泡沫剂/驱油剂辅助蒸汽驱技术室内实验[J].应用化工,2015,44(11):1988-1991.
[9]李德儒,庞占喜.热力泡沫改善稠油油藏蒸汽驱开发效果[J].特种油气藏,2016,23(5):89-92.
[10]吴正彬,刘慧卿,庞占喜,等.稠油氮气泡沫辅助蒸汽驱可视化实验研究[J].特种油气藏,2016,23(5):126-129.
[11]林伟民,史江恒,肖良,等.中高渗油藏空气泡沫调驱技术[J].石油钻采工艺,2009,31(增刊1):115-118.
[12]张瀚奭,郑家朋,张立民,等.高浅北区稠油油藏空气泡沫驱实验[J].油田化学,2014,31(4):527-530.
[13]李玥洋.低氧空气泡沫驱应用基础及数值模拟研究[D].四川:西南石油大学,2014.
[14]郑强,刘慧卿,高超,等.浅层特稠油油藏氮气泡沫驱主控因素分析[J].特种油气藏,2015,22(1):137-140.
[15]周根荣.蒸汽氮气泡沫调驱实验研究[J].科学技术与工程,2012,12(6):1393-1396.