支化预交联凝胶颗粒在油藏中的运移与调剖特性
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摘要
调剖剂在多孔介质中的运移能力是影响其深部调剖性能的关键。支化预交联凝胶颗粒(B-PPG)是一种在PPG基础上发展的带有支化链的新型调剖剂,支化结构的引入能够增强其膨胀性能,提高颗粒弹性变形能力,使其通过弹性形变通过孔喉,运移至油藏深部调剖。针对该型调剖剂,设计了孔隙介质中的运移与调剖实验,重点考察了其微观运移与封堵特征、不同渗透率条件下的深部运移能力和调剖效果。结果表明,B-PPG膨胀能力较部分PPG强(体积/粒径膨胀倍数为47.3/3.6)。粒径大于喉道直径的B-PPG能够通过弹性形变通过孔喉,同时以单颗粒或多颗粒堆积的方式对孔喉形成暂时性和反复性的封堵。在匹配渗透率条件下(1.6~3.2 D),B-PPG能够运移至模型深部,实现液流转向,扩大波及体积,为实现非均质油藏深部调剖提供了可行的技术选择。
IMigration capacity of is a critical property of profile-control agents for achieving in-dept profile improvement. B-PPG(branched-performed particle gel), a newly developed profile-control agent basing on the traditional PPG, performs increased expansion capacity and enhanced elastic-deformation ability due to the introduction of branched structures, which makes it capable of transporting to depth of reservoirs for improving water-absorption profile. Focusing on this agent, migration and profile-control experiments in porous media were designed to evaluate its microscopic migration and plugging features, in-depth migration and profile control performance under different permeabilities. The results show that B-PPG is more expansive than PPG with the volume/size swelling factor of 47.3/3.6. B-PPG with a greater size than the diameter of a pore, could pass through the pore by elastic deformation, and simultaneously, plug it temporarily and repeatedly in the form of a single particle or the accumulation of multiple particles. Under the matching permeabilities(1.6~3.2 D), B-PPG can migrate to the depth of the model, diverting the liquid flow, as a result, expanding the sweep volume, and finally providing a feasible technical choice for in-depth profile control in heterogeneous reservoirs..
IMigration capacity of is a critical property of profile-control agents for achieving in-dept profile improvement. B-PPG(branched-performed particle gel), a newly developed profile-control agent basing on the traditional PPG, performs increased expansion capacity and enhanced elastic-deformation ability due to the introduction of branched structures, which makes it capable of transporting to depth of reservoirs for improving water-absorption profile. Focusing on this agent, migration and profile-control experiments in porous media were designed to evaluate its microscopic migration and plugging features, in-depth migration and profile control performance under different permeabilities. The results show that B-PPG is more expansive than PPG with the volume/size swelling factor of 47.3/3.6. B-PPG with a greater size than the diameter of a pore, could pass through the pore by elastic deformation, and simultaneously, plug it temporarily and repeatedly in the form of a single particle or the accumulation of multiple particles. Under the matching permeabilities(1.6~3.2 D), B-PPG can migrate to the depth of the model, diverting the liquid flow, as a result, expanding the sweep volume, and finally providing a feasible technical choice for in-depth profile control in heterogeneous reservoirs..
引文
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[2]丁名臣,岳湘安,张立娟,赵海龙,王振民.油藏孔隙的剪切立伸对弱凝胶调剖特性的影响研究[J].油田化学,2013,30(4):521-523.DING Mingchen,YUE Xiang’an,ZHANG Lijuan,ZHAOHailong,WANG Zhenmin.The shear-strech effects of reservoir pores on weak gel profi le-control properties[J].Oilfi eld Chemistry,2013,30(4):521-523.
[3]贺杰,岳湘安,丁名臣,王业飞,李立峰,陈怡秀.多孔介质中弱凝胶运移封堵特征[J].油田化学,2015,32(2):190-194.HE Jie,YUE Xiang’an,DING Mingchen,WANG Yefei,LI Lifeng,CHEN Yixiu.Migration-plugging properties of weak gel in porous media[J].Oilfi eld Chemistry,2015,32(2):190-194.
[4]唐孝芬,刘玉章,刘戈辉,李良雄,白宝君,蔡磊.预交联凝胶颗粒调剖剂性能评价方法[J].石油钻采工艺,2004,26(4):73-75.TANG Xiaofen,LIU Yuzhang,LIU Gehui,LI Liangxiong,BAI Baojun,CAI Lei.Methodology applied for property evaluation of pregelled particles[J].Oil Drilling&Production Technology,2004,26(4):73-75.
[5]于龙,李亚军,宫厚健,桑茜,王金杰,董明哲,董晓钰.支化预交联凝胶颗粒封堵性能与调剖能力评价[J].油气地质与采收率,2015,22(5):107-111.YU Long,LI Yajun,GONG Houjian,SANG Qian,WANGJinjie,DONG Mingzhe,DONG Xiaoyu.Evaluation on the plugging performance and profi le control ability of the branched-preformed particle gel[J].Petroleum Geology and Recovery Effi ciency,2015,22(5):107-111.
[6]姜祖明,郭兰磊,祝仰文,曹绪龙.荧光黏弹性颗粒驱油剂的制备及性能研究[C].大连:中国化学会第30届学术年会,2016.JIANG Zuming,GUO Lanlei,ZHU Yangwen,CAOXulong.Preparation and properties of fluorescent branched preformed particle gel[C].Dalian:The 30th Annual Academic Conference of Chinese Chemical Society,2016.
[7]GONG H J,ZHANG H,XU L,LI K N,YU L,SANG Q,LI L J,DONG M Z.The Synergistic effect of branchedpreformed particle gel and hydrolyzed polyacrylamide on further-enhanced oil recovery after polymer fl ooding[J].Energy Fuels,2017,31:7904-7910.
[8]李立涛.B-PPG非均相体系渗流机理研究[D].青岛:中国石油大学(华东),2013.LI Litao.Investigation on flow rule of B-PPG heterogeneous system in porous media[D].Qingdao:China University of Petroleum(East China),2013.
[9]康万利,徐浩,杨红斌,赵文越,杜山山,贡晓亚,刘雪琦.预交联凝胶颗粒膨胀性能的影响因素[J].石油与天然气化工,2014,43(6):662-674.KANG Wanli,XU Hao,YANG Hongbin,ZHAO Wenyue,DU Shanshan,GONG Xiaoya,LIU Xueqi.Study on expansion property of pre-crosslinked particle gel with low elasticity and high viscosity[J].Chemical Engineering of Oil&Gas,2014,43(6):662-674.
[10]赵燕红.预交联凝胶颗粒的吸水膨胀性能评价及应用[J].石油化工应用,2014,33(9):86-89.ZHAO Yanhong.Research on water-swelling properties of pre-crosslinked gel particles and its application[J].Petrochemical Industry Application,2014,33(9):86-89.
[11]周亚贤,郭建华,王同军,王旭,刘敏,苏雪霞,张滨.一种耐温抗盐预交联凝胶颗粒及其应用[J].油田化学,2007,24(1):75-78.ZHOU Yaxian,GUO Jianhua,WANG Tongjun,WANGXu,LIU Min,SUN Xuexia,ZHANG Bin.A high temperature and high salinity resistant particulated precrosslinked gel and its use for reservoir permeability adjustment[J].Oilfi eld Chemistry,2007,24(1):75-78.
[12]白宝君.预交联凝胶颗粒深部调驱应用基础研究[D].北京:中国地质大学,2001,59-65.BAI Baojun.Basic research of the Pre-gel particle for indepth profi le control[D].Beijing:China University of Geosciences,2001,59-65.