大庆油田三元复合驱后微观剩余油分布特征
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摘要
为搞清三元复合驱后储层内微观剩余油分布特征,指导三元复合驱后剩余油精细挖潜,利用大庆油田三元复合驱试验区取心井岩心,开展油水饱和度检测及水驱、聚驱、三元复合驱驱油实验,采用激光共聚焦显微镜(LSCM)二维及三维成像技术,定性和定量地描述了复合驱后基于取心井的微观剩余油分布特征。结果表明:一是通过取心井岩心观察检测可知:复合驱后剩余油主要分布在采出端附近、河道砂体的中上部、隔夹层下部以及非河道砂体内,交错层理砂体段驱替较均匀,块状砂体段驱替差异较大,驱油效率下部大幅高于上部;二是将微观剩余油分为簇状、孔表薄膜状、喉道状、角隅状、粒间吸附状及粒内状等6种类型,通过定量分析可知:化学驱油效果明显,水驱、聚驱、三元复合驱的孔表薄膜状、簇状剩余油绝对含油饱和度依次下降;分布形态从连续到断续、从线状到油珠状、从凸形到凹形转变;簇状剩余油相对含油饱和度占50%以上,主要分布在局部低渗透部位,是复合驱后剩余油挖潜重点对象。
In order to make clear of the distribution characteristics of the micro-remained oil in the reservoir after ASP flooding and guide the fine tapping of the oil, using the cores of the coring well in the ASP-flooding test block of Daqing Oilfield, the oil-water saturation detection and water, polymer and ASP floodings' experiments were conducted, and moreover with the help of the laser confocal microscopy(LSCM) two-dimensional and three-dimensional imaging techniques, the micro-remained oil distribution characteristics were described qualitatively and quantitatively based on the coring well after the ASP flooding. The results show that first, it can be seen from the core observation of the coring well that the remained oil after the ASP flooding is mainly distributed near the produced end, in the upper-middle parts of the channel sandbody, the lower part of the interlayer and the non-channel sandbody; the staggered bedding sandbody interval is more evenly displaced, the displacement in the block sandbody interval is quite different, the oil displacement efficiency in the lower part is much higher than that of the upper part; secondly, the micro-remained oil can be divided into six types: cluster-like, membrane-like on the pore surface, throat-like, horn-like, intergranular adsorption and intragranular adsorption. By means of the quantitative analysis, it can be seen that the chemical flooding effects are obvious, the absolute contents of the film-like and cluster-like remained oil in the water flooding, polymer flooding and ASP flooding decrease in turn; the distribution patterns change from the continuous to intermittent, from linear to oily, from convex to concave; the relative content of the cluster remained oil accounts for more than 50%, the oil is mainly distributed in the partial low-permeability part, which is the key target of remained oil potential tapping after the ASP flooding.
In order to make clear of the distribution characteristics of the micro-remained oil in the reservoir after ASP flooding and guide the fine tapping of the oil, using the cores of the coring well in the ASP-flooding test block of Daqing Oilfield, the oil-water saturation detection and water, polymer and ASP floodings' experiments were conducted, and moreover with the help of the laser confocal microscopy(LSCM) two-dimensional and three-dimensional imaging techniques, the micro-remained oil distribution characteristics were described qualitatively and quantitatively based on the coring well after the ASP flooding. The results show that first, it can be seen from the core observation of the coring well that the remained oil after the ASP flooding is mainly distributed near the produced end, in the upper-middle parts of the channel sandbody, the lower part of the interlayer and the non-channel sandbody; the staggered bedding sandbody interval is more evenly displaced, the displacement in the block sandbody interval is quite different, the oil displacement efficiency in the lower part is much higher than that of the upper part; secondly, the micro-remained oil can be divided into six types: cluster-like, membrane-like on the pore surface, throat-like, horn-like, intergranular adsorption and intragranular adsorption. By means of the quantitative analysis, it can be seen that the chemical flooding effects are obvious, the absolute contents of the film-like and cluster-like remained oil in the water flooding, polymer flooding and ASP flooding decrease in turn; the distribution patterns change from the continuous to intermittent, from linear to oily, from convex to concave; the relative content of the cluster remained oil accounts for more than 50%, the oil is mainly distributed in the partial low-permeability part, which is the key target of remained oil potential tapping after the ASP flooding.
引文
[1]WANG Demin,ZHANG Zhenhua,CHENG Jiecheng,et al.Pilot test of alkaline surfactant polymer flooding in Daqing Oilfield[R].SPE 36748,1997.
[2]WANG Demin,CHENG Jiecheng,WU Junzheng,et al.An alkaline/surfactant/polymer field test in a reservoir with a long-term 100% water cut[R].SPE 49018,1998.
[3]WANG Demin,CHENG Jiecheng,LI Qun,et al.An alkaline bio-surfactant polymer flooding pilot in Daqing Oilfield[R].SPE 57304,1999.
[4]程杰成,廖广志,杨振宇,等.大庆油田三元复合驱矿场试验综述[J].大庆石油地质与开发,2001,20(2):46-49.CHENG Jiecheng,LIAO Guangzhi,YANG Zhenyu,et al.Pilot test of ASP flooding in Daqing Oilfiled[J].Petroleum Geology & Oilfield Development in Daqing,2001,20(2):46-49.
[5]殷代印,房雨佳.三元复合驱微观剩余油驱替机理及动用比例研究[J].石油化工高等学校学报,2017,30(1):18-22.YIN Daiyin,FANG Yujia .Mechanism and utilization ratio of microscopic residual oil displacement in ASP flooding[J].Journal of Petrochemical Universities,2017,30(1):18-22.
[6]李宜强,陈建勋,金楚逸,等.砾岩油藏聚合物驱后二元和三元复合驱的优选[J].油气地质与采收率,2017,24(2):63-66.LI Yiqiang,CHEN Jianxun,JIN Chuyi,et al.Optimization of SP and ASP flooding after polymer flooding in conglomerate reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(2):63-66.
[7]吴凤琴.三元复合驱后微观剩余油赋存状态及分布特征[J].石油地质与工程,2016,30(2):127-129.WU Fengqin.Occurrence and distribution characteristics of microscopic residual oil after ASP flooding[J].Petroleum Geology and Engineering,2016,30(2):127-129.
[8]肖春林,韩甲胜,吴让彬,等.克拉玛依油田七中区克下组复合驱试验区剩余油研究[J].新疆石油天然气,2015,11(2):50-53.XIAO Chunlin,HAN Jiasheng,WU Rangbin,et al.Seven Central Karamay Oilfield Kexia Formation flooding test area of remaining oil research[J].Xinjiang Oil & Gas,2015,11(2):50-53.
[9]王艳霞.双河油田Ⅳ5-11层系复合驱剩余油分布与井网重组研究[J].石油地质与工程,2012,26(1):29-32.WANG Yanxia.Research on residual oil distribution and well pattern reconstruction of IV5-11 Layer Series with combination flooding of Shuanghe Oilfield[J].Petroleum Geology and Engineering,2012,26(1):29-32.
[10]高帅.大型复合河道砂体内部构型及剩余油研究[D].大庆:东北石油大学,2017.GAO Shuai.The study on architecture analysis and remaning oil of large scale overlap channles[D].Daqing:Northeast Petroleum University,2017.
[11]丁圣.特高含水期油藏剩余油形成与分布研究[D].青岛:中国石油大学,2011.DING Sheng.The formation and distribution of remaining oil at extra high water-cut stage[D].Qingdao:China University of Petroleum,2011.
[12]赵国欣.开发后期河流相储层精细刻画及剩余油定量描述[D].杭州:浙江大学,2008.ZHAO Guoxin.The study on finely modeling method of reservoir geology and distribution laws of remaining oil in the fluvial facies[D].Hangzhou:Zhejiang University,2008.
[13]兰玉波.化学驱波及系数和驱油效率的研究[D].大庆:大庆石油学院,2006.LAN Yubo.Study about the sweep coefficient and oil displacement efficiency of chemical flooding[D].Daqing:Daqing Petroleum Institute,2006.
[14]王言娥.大庆油田萨中开发区二类油层特征及复合驱提高采收率试验研究[D].杭州:浙江大学,2014.WANG Yan’e.The character and EOR research of ASP flooding on the second type oil reservoir of Sazhong developing area in Daqing Oilfield[D].Hangzhou:Zhejiang University,2014.
[15]魏勋.三类油层弱碱三元复合驱物理模拟技术研究[D].大庆:东北石油大学,2012.WEI Xun.The physical simulation technology research of weak base alkali-surfactant-polymer flooding[D].Daqing:Northeast Petroleum University,2012.
[16]曲国辉.强碱三元复合驱后岩心物性检测及微观剩余油研究[D].大庆:东北石油大学,2012.QU Guohui.Research on core property detection and micro residual oil after strong alkali ASP flooding[D].Daqing:Northeast Petroleum University,2012.
[17]马蒋平.基于三维网络模型的黏弹性聚合物溶液驱油效率研究[D].大庆:东北石油大学,2013.MA Jiangping.Research on oil displacement efficiency of viscoelastic polymer solution flooding based on three-dimensional network model[D].Daqing:Northeast Petroleum University,2013.
[18]王营.西区二元试验区剩余油分布特征研究[D].大庆:东北石油大学,2011.WANG Ying.Study on remaining oil distribution in surfactant-polymer test area of West Block[D].Daqing:Northeast Petroleum University,2011.
[19]张瑞.三元复合驱驱油机理及注入方式优化研究[D].大庆:大庆石油学院,2009.ZHANG Rui.Studies on the mechanism of ASP and the injection optimization of ASP flooding[D].Daqing:Daqing Petroleum Institute,2009.
[20]刘义坤,范萌,张东,等.三元复合驱后剩余油微观特征[J].大庆石油地质与开发,2015,34(2):117-120.LIU Yikun,FAN Meng,ZHANG Dong,et al.Microscopic characteristics of the remained oil after ASP flooding[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(2):117-120.
[21]范萌.龙虎泡油田高含水期提液室内实验研究[D].大庆:东北石油大学,2014.FAN Meng.Experimental study on extracting liquid in high water cut stage of Longhupao Oilfield[D].Daqing:Northeast Petroleum University,2014.
[22]白振强,吴胜和,付志国.大庆油田聚合物驱后微观剩余油分布规律[J].石油学报,2013,34(5):924-931.BAI Zhenqiang,WU Shenghe,FU Zhiguo.The distribution of microcosmic remaining oils after polymer flooding in Daqing Oilfield[J].Acta Petrolei Sinica,2013,34(5):924-931.
[23]孙先达.储层微观剩余油分析技术开发与应用研究[D].长春:吉林大学,2011.SUN Xianda.New technique invention and application of characterizing microscopic remnant oil in reservoirs[D].Changchun:Jilin University,2011.
[2]WANG Demin,CHENG Jiecheng,WU Junzheng,et al.An alkaline/surfactant/polymer field test in a reservoir with a long-term 100% water cut[R].SPE 49018,1998.
[3]WANG Demin,CHENG Jiecheng,LI Qun,et al.An alkaline bio-surfactant polymer flooding pilot in Daqing Oilfield[R].SPE 57304,1999.
[4]程杰成,廖广志,杨振宇,等.大庆油田三元复合驱矿场试验综述[J].大庆石油地质与开发,2001,20(2):46-49.CHENG Jiecheng,LIAO Guangzhi,YANG Zhenyu,et al.Pilot test of ASP flooding in Daqing Oilfiled[J].Petroleum Geology & Oilfield Development in Daqing,2001,20(2):46-49.
[5]殷代印,房雨佳.三元复合驱微观剩余油驱替机理及动用比例研究[J].石油化工高等学校学报,2017,30(1):18-22.YIN Daiyin,FANG Yujia .Mechanism and utilization ratio of microscopic residual oil displacement in ASP flooding[J].Journal of Petrochemical Universities,2017,30(1):18-22.
[6]李宜强,陈建勋,金楚逸,等.砾岩油藏聚合物驱后二元和三元复合驱的优选[J].油气地质与采收率,2017,24(2):63-66.LI Yiqiang,CHEN Jianxun,JIN Chuyi,et al.Optimization of SP and ASP flooding after polymer flooding in conglomerate reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(2):63-66.
[7]吴凤琴.三元复合驱后微观剩余油赋存状态及分布特征[J].石油地质与工程,2016,30(2):127-129.WU Fengqin.Occurrence and distribution characteristics of microscopic residual oil after ASP flooding[J].Petroleum Geology and Engineering,2016,30(2):127-129.
[8]肖春林,韩甲胜,吴让彬,等.克拉玛依油田七中区克下组复合驱试验区剩余油研究[J].新疆石油天然气,2015,11(2):50-53.XIAO Chunlin,HAN Jiasheng,WU Rangbin,et al.Seven Central Karamay Oilfield Kexia Formation flooding test area of remaining oil research[J].Xinjiang Oil & Gas,2015,11(2):50-53.
[9]王艳霞.双河油田Ⅳ5-11层系复合驱剩余油分布与井网重组研究[J].石油地质与工程,2012,26(1):29-32.WANG Yanxia.Research on residual oil distribution and well pattern reconstruction of IV5-11 Layer Series with combination flooding of Shuanghe Oilfield[J].Petroleum Geology and Engineering,2012,26(1):29-32.
[10]高帅.大型复合河道砂体内部构型及剩余油研究[D].大庆:东北石油大学,2017.GAO Shuai.The study on architecture analysis and remaning oil of large scale overlap channles[D].Daqing:Northeast Petroleum University,2017.
[11]丁圣.特高含水期油藏剩余油形成与分布研究[D].青岛:中国石油大学,2011.DING Sheng.The formation and distribution of remaining oil at extra high water-cut stage[D].Qingdao:China University of Petroleum,2011.
[12]赵国欣.开发后期河流相储层精细刻画及剩余油定量描述[D].杭州:浙江大学,2008.ZHAO Guoxin.The study on finely modeling method of reservoir geology and distribution laws of remaining oil in the fluvial facies[D].Hangzhou:Zhejiang University,2008.
[13]兰玉波.化学驱波及系数和驱油效率的研究[D].大庆:大庆石油学院,2006.LAN Yubo.Study about the sweep coefficient and oil displacement efficiency of chemical flooding[D].Daqing:Daqing Petroleum Institute,2006.
[14]王言娥.大庆油田萨中开发区二类油层特征及复合驱提高采收率试验研究[D].杭州:浙江大学,2014.WANG Yan’e.The character and EOR research of ASP flooding on the second type oil reservoir of Sazhong developing area in Daqing Oilfield[D].Hangzhou:Zhejiang University,2014.
[15]魏勋.三类油层弱碱三元复合驱物理模拟技术研究[D].大庆:东北石油大学,2012.WEI Xun.The physical simulation technology research of weak base alkali-surfactant-polymer flooding[D].Daqing:Northeast Petroleum University,2012.
[16]曲国辉.强碱三元复合驱后岩心物性检测及微观剩余油研究[D].大庆:东北石油大学,2012.QU Guohui.Research on core property detection and micro residual oil after strong alkali ASP flooding[D].Daqing:Northeast Petroleum University,2012.
[17]马蒋平.基于三维网络模型的黏弹性聚合物溶液驱油效率研究[D].大庆:东北石油大学,2013.MA Jiangping.Research on oil displacement efficiency of viscoelastic polymer solution flooding based on three-dimensional network model[D].Daqing:Northeast Petroleum University,2013.
[18]王营.西区二元试验区剩余油分布特征研究[D].大庆:东北石油大学,2011.WANG Ying.Study on remaining oil distribution in surfactant-polymer test area of West Block[D].Daqing:Northeast Petroleum University,2011.
[19]张瑞.三元复合驱驱油机理及注入方式优化研究[D].大庆:大庆石油学院,2009.ZHANG Rui.Studies on the mechanism of ASP and the injection optimization of ASP flooding[D].Daqing:Daqing Petroleum Institute,2009.
[20]刘义坤,范萌,张东,等.三元复合驱后剩余油微观特征[J].大庆石油地质与开发,2015,34(2):117-120.LIU Yikun,FAN Meng,ZHANG Dong,et al.Microscopic characteristics of the remained oil after ASP flooding[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(2):117-120.
[21]范萌.龙虎泡油田高含水期提液室内实验研究[D].大庆:东北石油大学,2014.FAN Meng.Experimental study on extracting liquid in high water cut stage of Longhupao Oilfield[D].Daqing:Northeast Petroleum University,2014.
[22]白振强,吴胜和,付志国.大庆油田聚合物驱后微观剩余油分布规律[J].石油学报,2013,34(5):924-931.BAI Zhenqiang,WU Shenghe,FU Zhiguo.The distribution of microcosmic remaining oils after polymer flooding in Daqing Oilfield[J].Acta Petrolei Sinica,2013,34(5):924-931.
[23]孙先达.储层微观剩余油分析技术开发与应用研究[D].长春:吉林大学,2011.SUN Xianda.New technique invention and application of characterizing microscopic remnant oil in reservoirs[D].Changchun:Jilin University,2011.