WQ100型聚合物微球理化性质及注入参数优化
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摘要
为了考察WQ100型聚合物微球在低渗透油藏条件下的基本理化性能、粒径变化规律、微观结构、注入浓度和段塞大小与调驱效果的关系,采用表观性能检测、激光光散射粒径仪、透射电子显微镜、平面填砂可视化物模调驱实验等测试方法并结合油田现场实施情况对其性质特点和注入参数进行了系统的表征和优化。结果表明:WQ100型聚合物微球产品具有良好的稳定性和流动性,可在水中快速分散,可分离固形物质量分数为22%,初始粒径为纳米级,形貌为类球形,经水化后体积发生膨胀,非常适合在低渗透油藏应用;注入采用低浓度长段塞比高浓度短段塞注入可以获得更理想的注入水波及效果,油田现场应用采收率提高显著,投入产出比可以达到1∶3。
In order to investigate the basic physicochemical properties,particle size variation,micro-structure of polymer microspheres WQ100 and the relationship between oil displacement effect and injected concentration/slug size in low permeability reservoir,the basic physical and chemical properties and field injection parameters of polymer microspheres WQ100 were systematically characterized and optimized by means of apparent performance testing,laser particle size analyzer,transmission electron microscopy and the plane visual sand-filling model profile control and flooding experiments.The results show that polymer microspheres WQ100 has good stability and fluidity.It can disperse rapidly in water,and the mass fraction of separable solids is 22%.The initial particle size of polymer microspheres WQ100 is nanometer grade and its morphology is spherical.After hydration,the polymer microspheres WQ100 will expand,soit is very suitable for application in low permeability reservoirs.Better water sweep efficiency can be achieved by injecting the long slug of low concentration than the short slug of high concentration.The applications in oilfields show that enhanced oil recovery is remarkably improved,and the input-output ratio can reach 1:3.
In order to investigate the basic physicochemical properties,particle size variation,micro-structure of polymer microspheres WQ100 and the relationship between oil displacement effect and injected concentration/slug size in low permeability reservoir,the basic physical and chemical properties and field injection parameters of polymer microspheres WQ100 were systematically characterized and optimized by means of apparent performance testing,laser particle size analyzer,transmission electron microscopy and the plane visual sand-filling model profile control and flooding experiments.The results show that polymer microspheres WQ100 has good stability and fluidity.It can disperse rapidly in water,and the mass fraction of separable solids is 22%.The initial particle size of polymer microspheres WQ100 is nanometer grade and its morphology is spherical.After hydration,the polymer microspheres WQ100 will expand,soit is very suitable for application in low permeability reservoirs.Better water sweep efficiency can be achieved by injecting the long slug of low concentration than the short slug of high concentration.The applications in oilfields show that enhanced oil recovery is remarkably improved,and the input-output ratio can reach 1:3.
引文
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[2] 宋燕高,牛静,贺海,等.油田化学堵水调剖剂研究进展[J].精细石油化工进展,2008,8(5):5-11.SONG Yangao,NIU Jing,HE Hai,et al.Research progress on chemical water shutoffand profile control agent in oilfield[J].Advances in Fine Petrochemicals,2008,8(5):5-11.
[3] 顾锡奎,杜芳艳,王小泉.化学深部调驱技术现状与进展[J].石油化工应用,2009,28(3):4-7.GU Xikui,DU Fangyan,WANG Xiaoquan.Current situation and development of chemical deep oil displacement regulation technology[J].Petrochemical Industry Application,2009,28(3):4-7.
[4] 孙焕泉,王涛,肖建洪,等.新型聚合物微球逐级深部调剖技术[J].油气地质与采收率,2006,13(4):77-79.SUN Huanquan,WANG Tao,XIAO Jianhong,et al.Novel technique of in - depth profile control step by step by polymer microspheres[J].Petroleum Geology and Recovery Efficiency,2006,13(4):77-79.
[5] 刘承杰,安俞蓉.聚合物微球深部调剖技术研究及矿场实践[J].钻采工艺,2010,32(5):62-64.LIU Chengjie,AN Yurong.Research and application of polymer microspheres deep profile control technology[J].Drilling & Production Technology,2010,32(5):62-64.
[6] 姚传进,雷光伦,高雪梅,等.非均质条件下孔喉尺度弹性微球深部调驱研究[J].油气地质与采收率,2012,19(5):61-64.YAO Chuanjin,LEI Guanglun,GAO Xuemei,et al.Research on deep profile control and oil displacement of elastic microspheres which is pore throat scale under heterogeneous conditions[J].Petroleum Geology and Recovery Efficiency,2012,19(5):61-64.
[7] 陈渊,孙玉青,温栋良,等.聚合物纳米微球调驱性能室内评价及现场试验[J].石油钻探技术,2012,40(4):102-106.CHEN Yuan,SUN Yuqing,WEN Dongliang,et al.Evaluation and application on profile control of polymer nano-microspheres[J].Petroleum Drilling Techniques,2012,40(4):102-106.
[8] 金玉宝,卢祥国,谢坤,等.聚合物微球油藏适应性评价方法及调驱机理研究[J].石油化工,2017,46(7):925-933.JIN Yubao,LU Xiangguo,XIE Kun,et al.Polymer microspheres reservoir adaptability evaluation method and the mechanism of oil displacement[J].Petrochemical Technology,2017,46(7):925-933.
[9] 蔡永富,黎晓茸,施盟泉,等.聚合物纳米球驱在长庆油田特低渗透油藏中的适应性研究[J].石油钻采工艺,2013,35(4):88-93.CAI Yongfu,LI Xiaorong,SHI Mengquan,et al.Research on the adaptability of polymeric nano-spheres flooding in extra-low permeability reservoir in Changqing oilfield[J].Oil Drilling & Production Technology,2013,35(4):88-93.
[10] 易萍,周广卿,王石头,等.纳米聚合物微球调驱封堵机理及现场试验[J].西安石油大学学报(自然科学版),2018,33(3):86-91.YI Ping,ZHOU Guangqing,WANG Shitou,et al.Profile control mechanism and field test of nano polymer microspheres[J].Journal of Xi'an Shiyou University (Natural Science Edition),2018,33(3):86-91.
[11] 贾玉琴,郑明科,杨海恩,等.长庆油田低渗透油藏聚合物微球深部调驱工艺参数优化[J].石油钻探技术,2018,46(1):75-82.JIA Yuqin,ZHENG Mingke,YANG Haien,et al.Optimization of operational parameters for deep displacement involving polymer microspheres in low permeability reservoirs of the Changqing oilfield[J].Petroleum Drilling Techniques,2018,46(1):75-82.
[12] 闫冬,卢祥国,孙哲,等.聚合物微球水化动态特征及其渗流特性研究[J].石油化工高等学校学报,2018,31(5):45-52.YAN Dong,LU Xiangguo,SUN Zhe,et al.Research on the hydration dynamic characteristics and seepage characteristics of polymer microspheres[J].Journal of Petrochemical Universities,2018,31(5):45-52.
[13] 蒲万芬,赵帅,王亮亮,等.聚合物微球粒径与喉道匹配性研究[J].油气地质与采收率,2018,25(4):100-105.PU Wanfen,ZHAO Shuai,WANG Liangliang,et al.Investigation into the matching between the size of polymer microspheres and pore throats[J].Petroleum Geology and Recovery Efficiency,2018,25(4):100-105.