新型耐温抗盐聚合物驱油体系设计评价及应用
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摘要
针对胜利油田油藏温度高、地层水矿化度高、钙镁离子质量浓度高、地层原油黏度高等实际问题,设计具有较强耐温抗盐和抗钙镁能力的新型耐温抗盐聚合物驱油体系,以满足胜利油田Ⅲ类高温高盐普通稠油油藏聚合物驱流度控制需求。在常规聚合物性能评价的基础上完善新型耐温抗盐聚合物驱油性能评价体系,并总结新型耐温抗盐聚合物在岩心中的渗流规律。以油藏数值模拟为手段,开展聚合物驱油流度控制模拟。室内物理模拟实验结果表明,新型聚合物抗钙镁离子能力超过800 mg/L,室内提高采收率15.0%以上;在合理流度比界限下,数值模拟预测提高采收率7.0%。在胜坨油田二区东三4单元开展Ⅲ类高温高盐普通稠油油藏聚合物驱先导试验,综合含水率由96.5%下降到88.4%,日产油量从86 t/d增加到273 t/d,矿场降水增油效果显著。
Aiming at the practical problems of high reservoir temperature,high salinity of formation water,high concentra-tion of divalent cations of calcium and magnesium and high viscosity of formation crude oil in Shengli Oilfield,a novel poly-mer flooding system with strong tolerance to temperature,salinity,calcium and magnesium was designed to meet the needsof mobility control in polymer flooding in Class III of high-temperature and high-salinity heavy oil reservoirs. Based on theproperty evaluation of conventional polymers,a new property evaluation for the novel temperature-resistant and salt-toler-ant polymer flooding system was improved,and the seepage law of the novel polymer in the core was summarized. Besides,the mobility control simulation of the novel polymer flooding was carried out by reservoir numerical simulation. Physicalsimulation experiment results show that the ability of resistance of the novel polymer to Ca2+and Mg2+was above 800 mg/Land the enhanced oil recovery by the physical simulation was more than 15.0%. Under the guidance of the reasonable mo-bility ratio limits,the enhanced oil recovery by the numerical simulation was 7.0%. A pilot test of polymer flooding was car-ried out in No.4 unit of Dong3 member in No.2 area of Shengtuo Oilfield. The composite water cut was decreased from96.5% to 88.4% and the daily oil production was increased from 86 t/d to 273 t/d,which shows significant water cut de-crease and oil production increase.
Aiming at the practical problems of high reservoir temperature,high salinity of formation water,high concentra-tion of divalent cations of calcium and magnesium and high viscosity of formation crude oil in Shengli Oilfield,a novel poly-mer flooding system with strong tolerance to temperature,salinity,calcium and magnesium was designed to meet the needsof mobility control in polymer flooding in Class III of high-temperature and high-salinity heavy oil reservoirs. Based on theproperty evaluation of conventional polymers,a new property evaluation for the novel temperature-resistant and salt-toler-ant polymer flooding system was improved,and the seepage law of the novel polymer in the core was summarized. Besides,the mobility control simulation of the novel polymer flooding was carried out by reservoir numerical simulation. Physicalsimulation experiment results show that the ability of resistance of the novel polymer to Ca2+and Mg2+was above 800 mg/Land the enhanced oil recovery by the physical simulation was more than 15.0%. Under the guidance of the reasonable mo-bility ratio limits,the enhanced oil recovery by the numerical simulation was 7.0%. A pilot test of polymer flooding was car-ried out in No.4 unit of Dong3 member in No.2 area of Shengtuo Oilfield. The composite water cut was decreased from96.5% to 88.4% and the daily oil production was increased from 86 t/d to 273 t/d,which shows significant water cut de-crease and oil production increase.
引文
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[3]王德民,程杰成,吴军政,等.聚合物驱油技术在大庆油田的应用[J].石油学报,2005,26(1):74-78.WANG Demin,CHENG Jiecheng,WU Junzheng,et al.Application of polymer flooding technology in Daqing Oilfield[J].Acta Petrolei Sinica,2005,26(1):74-78.
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[5]张颖苹.稠油油藏聚合物驱剖面反转现象室内实验[J].特种油气藏,2016,23(6):111-114.ZHANG Yingping.Laboratory experiment of profile inversion regulation in heavy-oil reservoir with polymer flooding[J].Special Oil&Gas Reservoirs,2016,23(6):111-114.
[6]张忠勋.基于地质模型的聚合物驱控制程度计算方法[J].大庆石油地质与开发,2016,35(3):111-115.ZHANG Zhongxun.Calculating methods of the polymer-flooding controlling degree based on the geological model[J].Petroleum Geology&Oilfield Development in Daqing,2016,35(3):111-115.
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[9]李鹤永,田坤,邱旭明,等.油气优势运移通道形成“三要素”分析:以苏北盆地高邮凹陷XJZ油田为例[J].石油实验地质,2016,38(5):577-583.LI Heyong,TIAN Kun,QIU Xuming,et al.Three factors controlling petroleum migration pathways:A case study of XJZ oilfield in the Gaoyou Sag,North Jiangsu Basin[J].Petroleum Geology&Experiment,2016,38(5):577-583.
[10]刘坤,宋新旺,曹绪龙.耐温抗盐交联聚合物驱油体系性能评价[J].油气地质与采收率,2004,11(5):65-67.LIU Kun,SONG Xinwang,CAO Xulong.Property evaluation of oil displacement system with temperature-salt resisting crosslinked polymer[J].Petroleum Geology and Recovery Efficiency,2004,11(5):65-67.
[11]张健,张黎明,李健,等.无机盐对水溶液中两性离子聚合物分子线团尺寸的影响[J]油田化学,1998,15(2):105-108.ZHANG Jian,ZHANG Liming,LI Jian,et al.Influences of inorganic salts on molecular coil dimension of amphoteric polymers[J].Oilfield Chemistry,1998,15(2):105-108.
[12]徐辉,孙秀芝,韩玉贵,等.超高分子聚合物性能评价及微观结构研究[J].石油钻探技术,2013,41(3):114-118.XU Hui,SUN Xiuzhi,HAN Yugui,et al.Performance evaluation and microstructure study of ultra high molecular weight polymer[J].Petroleum Drilling Techniques,2013,41(3):114-118.
[13]曹绪龙,刘坤,韩玉贵,等.耐温抗盐缔合聚合物的合成及性能评价[J].油气地质与采收率,2014,21(2):10-14.CAO Xulong,LIU Kun,HAN Yugui,et al.Synthesis and properties of heat-tolerance and salt-resistance hydrophobically associating water-soluble polymer[J].Petroleum Geology and Recovery Efficiency,2014,21(2):10-14.
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[15]刘晓光.二类油层高质量浓度聚合物溶液性能及机理[J].大庆石油学院学报,2009,33(3):64-68.LIU Xiaoguang.Properties and mechanism of high mass concentration polymer solution in sub-layers[J].Journal of Daqing Petroleum Institute,2009,33(3):64-68.
[16]韩玉贵.耐温抗盐驱油用化学剂研究进展[J].西南石油大学学报:自然科学版,2011,33(3):149-153.HAN Yugui.Chemicals in heat tolerate and salt resistant flooding[J].Journal of Southwest Petroleum University:Science&Technology Edition,2011,33(3):149-153.
[17]徐辉.超高分子缔合聚合物溶液特性及驱油效果研究[J].石油钻探技术,2015,43(2):78-83.XU Hui.Solution characteristics and oil displacement efficiency of an ultrahigh molecular weight association polymer[J].Petroleum Drilling Techniques,2015,43(2):78-83.
[18]叶仲斌,彭杨,施雷庭,等.多孔介质剪切作用对聚合物溶液粘弹性及驱油效果的影响[J].油气地质与采收率,2008,15(5):59-62.YE Zhongbin,PENG Yang,SHI Leiting,et al.The influence of shear action in porous medium on viscoelasticity and oil displacement efficiency of polymer[J].Petroleum Geology and Recovery Efficiency,2008,15(5):59-62.
[19]宋新旺,李哲.缔合聚合物在多孔介质中的渗流运移特征[J].油气地质与采收率,2012,19(4):50-52.SONG Xinwang,LI Zhe.Study on seepage characteristics of hydrophobic associated polymer in porous media[J].Petroleum Geology and Recovery Efficiency,2012,19(4):50-52.
[20]孙焕泉.胜利油田三次采油技术的实践与认识[J].石油勘探与开发,2006,33(3):262-266.SUN Huanquan.Practice and understanding on tertiary recovery in Shengli Oilfield[J].Petroleum Exploration and Development,2006,33(3):262-266.
[21]徐辉,曹绪龙,孙秀芝,等.三次采油用小分子自组装超分子体系驱油性能[J].油气地质与采收率,2017,24(2):80-84.XU Hui,CAO Xulong,SUN Xiuzhi,et al.Study on oil displacement performance of self-assembled small-molecule supramolecular system for EOR[J].Petroleum Geology and Recovery Efficiency,2017,24(2):80-84.
[22]徐洪玲.油藏非均质性对聚合物驱开发效果的影响[J].油气地质与采收率,2015,22(5):99-102.XU Hongling.Impact of plane heterogeneity of oil reservoir on development effect of polymer flooding[J].Petroleum Geology and Recovery Efficiency,2015,22(5):99-102.
[23]王业飞,黄勇,孙致学,等.聚合物驱数值模拟参数敏感性研究[J].油气地质与采收率,2017,24(1):75-79.WANG Yefei,HUANG Yong,SUN Zhixue,et al.Study on sensitivities of numerical simulation parameters in polymer flooding[J].Petroleum Geology and Recovery Efficiency,2017,24(1):75-79.
[24]李爱芬,宋浩鹏,谢昊君.聚合物驱不可及孔隙体积对渗流规律的影响[J].油气地质与采收率,2016,23(2):70-75.LI Aifen,SONG Haopeng,XIE Haojun.Influence of inaccessible pore volume on seepage law of polymer flooding[J].Petroleum Geology and Recovery Efficiency,2016,23(2):70-75.
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