硅酸钙无机凝胶配方优选及凝胶的封堵和液流转向效果评价
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摘要
依据渤海油田高盐油藏深部调剖技术需求,采用光学显微镜、激光粒度仪、扫描电镜、流变仪和岩心驱替实验装置,开展了硅酸钙无机凝胶配方优选、流变性与黏弹性评价、基本形态观察以及封堵和液流转向效果实验研究。结果表明:Na_2SiO_3与CaCl_2溶液混合后产生无机凝胶,反应时间一定条件下,逐渐增加Na_2SiO_3与CaCl_2溶液浓度,生成物颗粒粒径中值呈现"先减小后增大再减小"变化趋势,但变化幅度较小,生成物由凝胶态逐渐转变为凝胶与沉淀物的混合态;无机凝胶具有弹性大于黏性的性质,同时随2种反应液浓度的增加,硅酸钙无机凝胶封堵和液流转向效果也逐渐增强;从技术经济角度综合考虑,推荐Na_2SiO_3和CaCl_2浓度为0.02～0.03 mol/L。
According to the technical requirements of the deep profile control in the high-salinity oil reservoirs of Bohai Oilfield, with the help of optical microscope, laser particle size analyzer, scanning electron microscope, rheometer and core displacing experiment device, the optimization of the calcium-silicate inorganic gel formulation, the evaluation of the rheology and viscoelasticity, the observation of the basic morphology, the experimental study on the plugging and fluid diversion effects were conducted. The results showed that after Na_2SiO_3 mixed with CaCl_2, the inorganic gel is produced, under a certain reaction time, with the gradual increase of the molar concentration of Na_2SiO_3 and CaCl_2 solution, the median value of the particle size of the product shows a trend of "decreasing first, then increasing and then decreasing", but the change amplitude is relatively small, and the product gradually changes from the gel state to the mixed state of the gel and the precipitate; the elasticity of the inorganic gel is greater than that of the viscosity. Meanwhile, with the increase of the concentrations of two kinds of the reacting fluid, the effects of the plugging and liquid flow diversion for inorganic gel are also gradually enhanced; from the technical and economic points of the view, the concentration range of Na_2SiO_3 and CaCl_2 is recommended to be 0.02 mol/L to 0.03 mol/L.
According to the technical requirements of the deep profile control in the high-salinity oil reservoirs of Bohai Oilfield, with the help of optical microscope, laser particle size analyzer, scanning electron microscope, rheometer and core displacing experiment device, the optimization of the calcium-silicate inorganic gel formulation, the evaluation of the rheology and viscoelasticity, the observation of the basic morphology, the experimental study on the plugging and fluid diversion effects were conducted. The results showed that after Na_2SiO_3 mixed with CaCl_2, the inorganic gel is produced, under a certain reaction time, with the gradual increase of the molar concentration of Na_2SiO_3 and CaCl_2 solution, the median value of the particle size of the product shows a trend of "decreasing first, then increasing and then decreasing", but the change amplitude is relatively small, and the product gradually changes from the gel state to the mixed state of the gel and the precipitate; the elasticity of the inorganic gel is greater than that of the viscosity. Meanwhile, with the increase of the concentrations of two kinds of the reacting fluid, the effects of the plugging and liquid flow diversion for inorganic gel are also gradually enhanced; from the technical and economic points of the view, the concentration range of Na_2SiO_3 and CaCl_2 is recommended to be 0.02 mol/L to 0.03 mol/L.
引文
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[18]王克亮,袁圆,伊鹏,等.贝雷岩心孔隙结构特点及其驱替特征[J].大庆石油地质与开发,2015,34(3):143-146.WANG Keliang,YUAN Yuan,YI Peng ,et al.Pore structure and displacement characteristics of Berea core[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(3):143-146.
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[20]周春玲,朱趁安,王妍琼,等.人造岩心的研制及渗透率影响因素研究[J].石油化工应用,2017,36(9):85-89.ZHOU Chunling,ZHU Chen’an,WANG Yanqiong,et al.Study on the development of man-made core and the influencing factors of permeability[J].Petrochemical Industry Application,2017,36(9):85-89.
[21]赵晓东,刘晓,张博明,等.南堡3号构造中深层中低渗储层微观孔喉特征[J].特种油气藏,2015,22(5):28-32,152.ZHAO Xiaodong,LIU Xiao,ZHANG Boming,et al.Microscopic Pore-throat structure characterization of medium-deep and medium-low permeability reservoirs in Nanpu Structure 3[J].Special Oil & Gas Reservoirs ,2015,22(5):28-32,152.
[22]张子麟,李希明,王昊,等.硅质树脂封窜调剖体系研制及应用[J].特种油气藏,2014,21(4):120-122,156-157.ZHANG Zilin,LI Ximing,WANG Hao,et al.Development and application of siliceous resin based channeling blockage and profile control system[J].Special Oil & Gas Reservoirs ,2014,21(4):120-122,156-157.
[23]张桂意,柴德民,崔洁,等.高温低渗油藏无机凝胶深部调剖剂WJ-2的研制[J].精细石油化工进展,2017,18(6):14-16.ZHANG Guiyi,CHAI Demin,CUI Jie,et al.Development of inorganic gel deep profile control agent WJ-2 for application in high-temperature low permeability reservoir[J].Advances in Fine Petrochemicals,2017,18(6):14-16
[2]夏庆龙.渤海油田近10年地质认识创新与油气勘探发现[J].中国海上油气,2016,28(3):1-9.XIA Qinglong.Innovation of geological theories and exploration discoveries in Bohai Oilfield in the last decade[J].China Offshore Oil and Gas,2016,28(3):1-9.
[3]张贤松,孙福街,康晓东,等.渤海油田聚合物驱油藏筛选及提高采收率潜力评价[J].中国海上油气,2009,21(3):169-172.ZHANG Xiansong,SUN Fujie,KANG Xiaodong,et al.Reservoir screening and enhancing recovery potential evaluation for polymer flooding in Bohai Oilfields [J].China Offshore Oil and Gas,2009,21(3):169-172.
[4]周守为,韩明,向问陶,等.渤海油田聚合物驱提高采收率技术研究及应用[J].中国海上油气,2006,18(6):386-389.ZHOU Shouwei,HAN Ming,XIANG Wentao,et al.Application of EOR technology by means of polymer flooding in Bohai Oilfield [J].China Offshore Oil and Gas,2006,18(6):386-389.
[5]姜维东,张健,唐晓东.渤海油田驱油用聚合物线团尺寸与岩石孔喉配伍性研究[J].油田化学,2012,29(4):446-451.JIANG Weidong,ZHANG Jian,TANG Xiaodong.Compatibility of clew dimension of flooding polymer and rock pore throat in Bohai Oilfield [J].Oilfield Chemistry,2012,29(4):446-451.
[6]姜汉桥,郑伟,张贤松,等.渤海油田早期聚合物驱动态规律及见效时间判断方法[J].中国石油大学学报( 自然科学版),2011,35(6):95-111.JIANG Hanqiao,ZHENG Wei,ZHANG Xiansong,et al.Dynamic law and method of judging effective time of early polymer flooding in Bohai Oilfield[J].Journal of China University of Petroleum(Edition of Natural Science),2011,35(6):95-111.
[7]冀忠伦,李岩,杨琴,等.化学沉淀-絮凝法处理油田压裂废液[J].工业用水与废水,2016,47(2):27-30.JI Zhonglun,LI Yan,YANG Qin,et al.Treatment of fracturing waste fluid by chemical sedimentation-flocculation process[J].Industrial Water & Waste Water,2016,47(2):27-30.
[8]赵修太,董林燕,王增宝,等.深部液流转向技术应用现状及发展趋势[J].应用化工,2013,42(6):1121-1123.ZHAO Xiutai,DONG Linyan,WANG Zengbao,et al.Application status and development tendency of deep fluid diversion[J].Applied Chemical Industry,2013,42(6):1121-1123.
[9]唐孝芬,杨立民,刘玉章,等.新型无机凝胶涂层深部液流转向剂[J].石油勘探与开发,2012,39(1):76-81.TANG Xiaofen,YANG Limin,LIU Yuzhang,et al.Inorganic gel coating in-depth fluid diverting agent [J].Petroleum Exploration and Development,2012,39(1):76-81.
[10]黄愤,崔洁,张桂意 ,等.无机凝胶调剖剂的性能评价与应用[J].精细石油化工进展,2006,7(3):4-6,9.HUANG Fen,CUI Jie,ZHANG Guiyi,et al.Evalaution and application of inorganic gel profile modification agent [J].Advances in Fine Petrochemicals,2006,7(3):4-6,9.
[11]赵彧,张桂意,崔洁,等.无机凝胶调剖剂的研制及应用[J].特种油气藏,2006,13(3):86-88,109.ZHAO Yu,ZHANG Guiyi,CUI Jie,et al.Development and application of inorganic gel profile control agent[J].Special Oil & Gas Reservoirs,2006,13(3):86-88,109.
[12]唐孝芬,刘玉章,常泽亮,等.适宜高温高盐地层的无机涂层调剖剂室内研究[J].石油勘探与开发,2004,31(6):92-94.TANG Xiaofen,LIU Yuzhang,CHANG Zeliang,et al.Profile modification agent with abio-gel coating for high temperature and high-salinity reservoir[J].Petroleum Exploration and Development,2004,31 (6):92-94.
[13]王小泉,魏君.一种硅酸类无机凝胶堵剂的制备[J].油田化学,2002,19(2):127-130.WANG Xiaoquan,WEI Jun.Preparation of cilicic inorganic gelatinous water control agent[J].Oilfield Chemistry,2002,19(2):127-130.
[14]张云宝,卢祥国,王婷婷,等.渤海油藏优势通道多级封堵与调驱技术[J].油气地质与采收率,2018,25(3):82-88.ZHANG Yunbao,LU Xiangguo,WANG Tingting,et al.Study on technology of multi-stage plugging and profile control for advantage channels in Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2018,25(3):82-88.
[15]梁守成,李强,吕鑫,等.多级调剖调驱技术效果及剩余油分布[J].大庆石油地质与开发,2018,37(6):108-115.LIANG Shoucheng,LI Qiang,Lü Xin ,et al.Effects of multistage profile controlling-displacing technology and the remained oil distribution[J].Petroleum Geology & Oilfield Development in Daqing,2018,37(6):108-115.
[16]王婷婷,卢祥国,潘赫,等.渤海油藏高渗透层封堵剂组成优化及其影响因素实验研究[J].油气地质与采收率,2018,25(6):114-119.WANG Tingting,LU Xiangguo,PAN He,et al.Experimental study on the composition optimization of plugging agent sand its influencing factors for highly permeable layers of Bohai Oilfield[J].Petroleum Geology and Recovery Efficiency,2018,25(6):114-119.
[17]卢祥国,高振环,闫文华.人造岩心渗透率影响因素试验研究[J].大庆石油地质与开发,1994,13(4):53-55,77.LU Xiangguo,GAO Zhenhuan,YAN Wenhua.Experimental study of factors influencing permeability of artificial core[J].Petroleum Geology & Oilfield Development in Daqing,1994,13(4):53-55,77.
[18]王克亮,袁圆,伊鹏,等.贝雷岩心孔隙结构特点及其驱替特征[J].大庆石油地质与开发,2015,34(3):143-146.WANG Keliang,YUAN Yuan,YI Peng ,et al.Pore structure and displacement characteristics of Berea core[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(3):143-146.
[19]韩大伟,卢祥国,王婷婷,等.人造岩心与天然岩心孔隙结构差异及对驱油剂渗流特性的影响[J].油气地质与采收率,2016,23(4):82-87.HAN Dawei,LU Xiangguo,WANG Tingting,et al.Difference of pore structure between artificial cores and natural cores and its influence on the seepage characteristics of oil displacement agent[J].Petroleum Geology and Recovery Efficiency,2016,23(4):82-87.
[20]周春玲,朱趁安,王妍琼,等.人造岩心的研制及渗透率影响因素研究[J].石油化工应用,2017,36(9):85-89.ZHOU Chunling,ZHU Chen’an,WANG Yanqiong,et al.Study on the development of man-made core and the influencing factors of permeability[J].Petrochemical Industry Application,2017,36(9):85-89.
[21]赵晓东,刘晓,张博明,等.南堡3号构造中深层中低渗储层微观孔喉特征[J].特种油气藏,2015,22(5):28-32,152.ZHAO Xiaodong,LIU Xiao,ZHANG Boming,et al.Microscopic Pore-throat structure characterization of medium-deep and medium-low permeability reservoirs in Nanpu Structure 3[J].Special Oil & Gas Reservoirs ,2015,22(5):28-32,152.
[22]张子麟,李希明,王昊,等.硅质树脂封窜调剖体系研制及应用[J].特种油气藏,2014,21(4):120-122,156-157.ZHANG Zilin,LI Ximing,WANG Hao,et al.Development and application of siliceous resin based channeling blockage and profile control system[J].Special Oil & Gas Reservoirs ,2014,21(4):120-122,156-157.
[23]张桂意,柴德民,崔洁,等.高温低渗油藏无机凝胶深部调剖剂WJ-2的研制[J].精细石油化工进展,2017,18(6):14-16.ZHANG Guiyi,CHAI Demin,CUI Jie,et al.Development of inorganic gel deep profile control agent WJ-2 for application in high-temperature low permeability reservoir[J].Advances in Fine Petrochemicals,2017,18(6):14-16