应用CT技术研究交联聚合物驱油机理
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摘要
为了进一步明确交联聚合物在岩心驱替中的运移特征,深入分析其驱油机理,用河南油田天然岩心,开展了交联聚合物驱油实验。利用计算机断层扫描(CT)技术,对交联聚合物的驱油过程进行跟踪扫描,重建了干岩心的孔隙结构,获得了在不同驱替时刻下,在岩心不同位置的交联聚合物运移特征图像。实验结果表明,CT技术可以用于研究交联聚合物溶液的运移特征,由CT扫描后经计算得出的孔隙度相对误差很小;交联聚合物在非均质性较强的岩心中仍以近活塞的形式向前运移,注入压力在上升一段时间后即保持平稳,表明交联聚合物可以有效扩大波及体积,提高微观驱油效率。
In order to further clear the migration feature of crosslinked polymer flooding in the core,analyzing thoroughly its flooding mech-anism,taking a natural core from an oilfield as research object,the crosslinked polymer flooding experiment was made using computed to-mography(CT)technique,the tracking scanning of the process of crosslinked polymer flooding was used for rebuilding the pore structureof dry core and migration feature images of crosslinked polymer at different displacement time and different locations in the core.Experi-ment results show that CT technique can be used for study of the migration feature of crosslinked polymer,the porosity calculated by the CTis very accurate,the relative error is only 0.93% compared with the measured value;the displacement front of crosslinked polymer in astrong heterogeneity core is still close to the piston,and the injection pressure is increasing for the initial time and then holding steady,indi-cating that crosslinked polymer can be used for expanding swept volume effectively,and improving microscopic oil displacement efficiency.
In order to further clear the migration feature of crosslinked polymer flooding in the core,analyzing thoroughly its flooding mech-anism,taking a natural core from an oilfield as research object,the crosslinked polymer flooding experiment was made using computed to-mography(CT)technique,the tracking scanning of the process of crosslinked polymer flooding was used for rebuilding the pore structureof dry core and migration feature images of crosslinked polymer at different displacement time and different locations in the core.Experi-ment results show that CT technique can be used for study of the migration feature of crosslinked polymer,the porosity calculated by the CTis very accurate,the relative error is only 0.93% compared with the measured value;the displacement front of crosslinked polymer in astrong heterogeneity core is still close to the piston,and the injection pressure is increasing for the initial time and then holding steady,indi-cating that crosslinked polymer can be used for expanding swept volume effectively,and improving microscopic oil displacement efficiency.
引文
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[11]元福卿,穆停华,魏翠华.一种快速求解交联聚合物驱数学模型的方法[J].西南石油大学学报(自然科学版),2014,36(6):128-134.YUAN Fuqing,MU Tinghua,WEI Cuihua.A fast solution to themathematical model of cross-linked polymer flooding[J].Journalof Southwest Petroleum University(Science&Technology Edition),2014,36(6):128-134.
[12]田根林,鞠岩,孙广煜,等.交联聚合物驱油机理研究[J].油气采收率技术,1997,4(2):8-11.TIAN Genlin,JU Yan,SUN Guangyu,et al.Research on the dis-placement mechanism with cross-linked polymer[J].PetroleumGeology and Recovery Efficiency,1997,4(2):8-11.
[13]张栋,吴文祥.不同黏弹性聚合物溶液交替注入提高采收率机理[J].新疆石油地质,2015,36(4):459-464.ZHANG Dong,WU Wenxiang.Polymer displacement mechanismwith different viscoelasticities by alternating injection process[J].Xinjiang Petroleum Geology,2015,36(4):459-464.
[14]宋立新.交联聚合物驱数学模型研究[J].特种油气藏,2003,10(4):38-40.SONG Lixin.Mathematical model of cross-linked polymer drive[J].Special Oil and Gas Reservoirs,2003,10(4):38-40.
[15]张敏,孙明霞.CT技术在油气勘探领域中的应用[J].大庆石油地质与开发,2002,21(2):15-16.ZHANG Min,SUN Mingxia.Application of X-ray CT technique topetroleum exploration[J].Petroleum Geology&Oilfield Develop-ment in Daqing,2002,21(2):15-16.
[16]李玉彬,李向良,李奎祥.利用计算机层析(CT)确定岩心的基本物理参数[J].石油勘探与开发,1999,26(6):86-90.LI Yubin,LI Xiangliang,LI Kuixiang.Using computed tomographyto determine the basic petrophysical properties of cores[J].Petro-leum Exploration and Development,1999,26(6):86-90.
[17]吕伟峰,冷振鹏,张祖波,等.应用CT扫描技术研究低渗透岩心水驱油机理[J].油气地质与采收率,2013,20(2):87-90.LV Weifeng,LENG Zhenpeng,ZHANG Zubo,et al.Study on wa-terflooding mechanism in low-permeability cores using CT scan-ning technology[J].Petroleum Geology and Recovery Efficiency,2013,20(2):87-90.
[18]邓世冠,吕伟峰,刘庆杰,等.利用CT技术研究砾岩驱油机理[J].石油勘探与开发,2014,41(3):330-335.DENG Shiguan,LV Weifeng,LIU Qingjie,et al.Research on displace-ment mechanism in conglomerate using CT scanning method[J].Petroleum Exploration and Development,2014,41(3):330-335.
[19]王家禄,高建,刘莉.应用CT技术研究岩石孔隙变化特征[J].石油学报,2009,30(6):887-897.WANG Jialu,GAO Jian,LIU Li.Porosity characteristics of sand-stone by X-ray CT scanning system[J].Acta Petrolei Sinica,2009,30(6):887-897.
[20]高建,韩冬,王家禄,等.应用CT成像技术研究岩心水驱含油饱和度分布特征[J].新疆石油地质,2009,30(2):269-271.GAO Jian,HAN Dong,WANG Jialu,et al.Application of CT scan-ning image technique to study of oil saturation distribution in coredisplacement test[J].Xinjiang Petroleum Geology,2009,30(2):269-271.
[2]李明远,林梅钦,郑晓宇,等.交联聚合物溶液深部调剖矿场试验[J].油田化学,2000,17(2):144-147.LI Mingyuan,LIN Meiqin,ZHENG Xiaoyu,et al.Linked polymer so-lution as in-depth permeability control agent:laboratory study andfield test[J].Oilfield Chemistry,2000,17(2):144-147.
[3]刘进祥,卢祥国,刘敬发,等.交联聚合物溶液在岩心内成胶效果及机理[J].石油勘探与开发,2013,40(4):474-480.LIU Jinxiang,LU Xiangguo,LIU Jingfa,et al.Mechanism and gell-ing effects of linked polymer solution in the core[J].Petroleum Ex-ploration and Development,2013,40(4):474-480.
[4]李森,程志强,李荣华,等.超低浓度有机铬交联聚合物凝胶驱油效率研究[J].新疆石油地质,2014,35(2):211-214.LI Sen,CHENG Zhiqiang,LI Ronghua,et al.Efficiency of oil dis-placement by ultra-low concentration organic chromium cross-linkedpolymer gel[J].Xinjiang Petroleum Geology,2014,35(2):211-214.
[5]曾显香,徐建玉,郑健,等.交联聚合物驱油技术研究及应用[J].断块油气田,2003,10(6):36-38.ZENG Xianxiang,XU Jianyu,ZHENG Jian,et al.Research and ap-plication of cross-linked polymer flooding oil[J].Fault-Block Oil&Gas Field,2003,10(6):36-38.
[6]李振泉,祝仰文,刘坤,等.三维非均质模型上聚合物及有机交联聚合物提高采收率研究[J].油田化学,2002,19(1):73-76.LI Zhenquan,ZHU Yangwen,LIU Kun,et al.A study of oil recoveryenhanced by polymer and phenolic resin-crosslinked polymer on het-erogeneous sand packs[J].Oilfield Chemistry,2002,19(1):73-76.
[7]陈泽华,赵修太,王增宝.异步交联深部调剖体系的室内实验[J].新疆石油地质,2015,36(3):317-321.CHEN Zehua,ZHAO Xiutai,WANG Zengbao.Laboratory experi-ment on asynchronous crosslinking system for deep profile control[J].Xinjiang Petroleum Geology,2015,36(3):317-321.
[8]韩信,崔朝轩,张三辉,等.交联聚合物整体调驱技术在文明寨油田的应用[J].油气田地面工程,2003,22(7):26.HAN Xin,CUI Chaoxuan,ZHANG Sanhui,et al.Cross-linked poly-mer flooding technology in the overall Wenmingzhai oilfield[J].Oil-Gas Field Surface Engineering,2003,22(7):26.
[9]马艳,陈祖华,李超,等.交联聚合物驱技术的矿场应用效果及开采特征[J].西南石油学院学报,2006,28(6):78-80.MA Yan,CHEN Zuhua,LI Chao,et al.Field application and produc-tion behavior of cross-linked polymer flooding technology[J].Jour-nal of Southwest Petroleum Institute,2006,28(6):78-80.
[10]张小卫,吕西辉,徐山,等.交联聚合物技术在胜利油田的应用[J].石油钻采工艺,2002,24(5):56-58.ZHANG Xiaowei,LV Xihui,XU Shan,et al.Application of cross-linking polymer technique in Shengli oilfield[J].Oil Drilling&Production Technology,2002,24(5):56-58.
[11]元福卿,穆停华,魏翠华.一种快速求解交联聚合物驱数学模型的方法[J].西南石油大学学报(自然科学版),2014,36(6):128-134.YUAN Fuqing,MU Tinghua,WEI Cuihua.A fast solution to themathematical model of cross-linked polymer flooding[J].Journalof Southwest Petroleum University(Science&Technology Edition),2014,36(6):128-134.
[12]田根林,鞠岩,孙广煜,等.交联聚合物驱油机理研究[J].油气采收率技术,1997,4(2):8-11.TIAN Genlin,JU Yan,SUN Guangyu,et al.Research on the dis-placement mechanism with cross-linked polymer[J].PetroleumGeology and Recovery Efficiency,1997,4(2):8-11.
[13]张栋,吴文祥.不同黏弹性聚合物溶液交替注入提高采收率机理[J].新疆石油地质,2015,36(4):459-464.ZHANG Dong,WU Wenxiang.Polymer displacement mechanismwith different viscoelasticities by alternating injection process[J].Xinjiang Petroleum Geology,2015,36(4):459-464.
[14]宋立新.交联聚合物驱数学模型研究[J].特种油气藏,2003,10(4):38-40.SONG Lixin.Mathematical model of cross-linked polymer drive[J].Special Oil and Gas Reservoirs,2003,10(4):38-40.
[15]张敏,孙明霞.CT技术在油气勘探领域中的应用[J].大庆石油地质与开发,2002,21(2):15-16.ZHANG Min,SUN Mingxia.Application of X-ray CT technique topetroleum exploration[J].Petroleum Geology&Oilfield Develop-ment in Daqing,2002,21(2):15-16.
[16]李玉彬,李向良,李奎祥.利用计算机层析(CT)确定岩心的基本物理参数[J].石油勘探与开发,1999,26(6):86-90.LI Yubin,LI Xiangliang,LI Kuixiang.Using computed tomographyto determine the basic petrophysical properties of cores[J].Petro-leum Exploration and Development,1999,26(6):86-90.
[17]吕伟峰,冷振鹏,张祖波,等.应用CT扫描技术研究低渗透岩心水驱油机理[J].油气地质与采收率,2013,20(2):87-90.LV Weifeng,LENG Zhenpeng,ZHANG Zubo,et al.Study on wa-terflooding mechanism in low-permeability cores using CT scan-ning technology[J].Petroleum Geology and Recovery Efficiency,2013,20(2):87-90.
[18]邓世冠,吕伟峰,刘庆杰,等.利用CT技术研究砾岩驱油机理[J].石油勘探与开发,2014,41(3):330-335.DENG Shiguan,LV Weifeng,LIU Qingjie,et al.Research on displace-ment mechanism in conglomerate using CT scanning method[J].Petroleum Exploration and Development,2014,41(3):330-335.
[19]王家禄,高建,刘莉.应用CT技术研究岩石孔隙变化特征[J].石油学报,2009,30(6):887-897.WANG Jialu,GAO Jian,LIU Li.Porosity characteristics of sand-stone by X-ray CT scanning system[J].Acta Petrolei Sinica,2009,30(6):887-897.
[20]高建,韩冬,王家禄,等.应用CT成像技术研究岩心水驱含油饱和度分布特征[J].新疆石油地质,2009,30(2):269-271.GAO Jian,HAN Dong,WANG Jialu,et al.Application of CT scan-ning image technique to study of oil saturation distribution in coredisplacement test[J].Xinjiang Petroleum Geology,2009,30(2):269-271.