密闭取心饱和度校正动态模型及影响因素分析
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摘要
针对密闭取心过程中孔隙、流体体积和溶解气随压力下降而改变导致测试饱和度出现较大误差的问题,应用油藏工程和渗流力学等理论与方法,基于溶解气驱理论和多相流分流量原理,建立了综合考虑孔隙、流体体积和溶解气随压力变化的岩心饱和度校正动态模型,编制了相应的计算流程,并评价了各影响因素的敏感性。结果表明:按岩心综合油水饱和度改变率大小排序,影响密闭取心饱和度的因素依次为溶解气体黏度、溶解气油比、原油体积系数、原油黏度、油水相对渗透率、原油压缩系数和岩石压缩系数。密闭取心饱和度校正动态模型能够反映压降过程中岩心的饱和度变化,吻合取心过程中的变化趋势,且校正结果和标定饱和度的相对误差平均为0. 8%,可为分析实际油藏油水饱和度分布提供可靠的依据。
In the process of sealing coring, pore, fluid volume and solved gas vary with the decline of pressure, and consequently the error of measured saturation is larger. To solve this problem, a dynamic model for core saturation correction was developed according to reservoir engineering and seepage mechanics, combined with dissolved gas drive theory and multi-phase fractional flow principle. In this model, the variation of pore, fluid volume and solved gas with the pressure is considered comprehensively. Then, the corresponding calculation procedure was put forward and the sensitivity of all influential factors was evaluated. It is indicated that according to the change rate of composite oil/water saturation of cores, the factors affecting the saturation of sealing cores are ranked from the top to the bottom as dissolved gas viscosity, dissolved gas-oil ratio, crude oil volume factor, oil viscosity, oil/water relative permeability, oil compressibility and rock compressibility. To sum up, the dynamic model for sealing core saturation correction can reflect the variation of core saturation in the process of pressure decline, which is in accordance with the change trend in the process of coring. In addition, the average relative error between the correction result and the calibrated saturation is 0. 8%. Therefore, the dynamic model can provide the reliable basis for analyzing the distribution of oil/water saturation of actual oil reservoirs.
In the process of sealing coring, pore, fluid volume and solved gas vary with the decline of pressure, and consequently the error of measured saturation is larger. To solve this problem, a dynamic model for core saturation correction was developed according to reservoir engineering and seepage mechanics, combined with dissolved gas drive theory and multi-phase fractional flow principle. In this model, the variation of pore, fluid volume and solved gas with the pressure is considered comprehensively. Then, the corresponding calculation procedure was put forward and the sensitivity of all influential factors was evaluated. It is indicated that according to the change rate of composite oil/water saturation of cores, the factors affecting the saturation of sealing cores are ranked from the top to the bottom as dissolved gas viscosity, dissolved gas-oil ratio, crude oil volume factor, oil viscosity, oil/water relative permeability, oil compressibility and rock compressibility. To sum up, the dynamic model for sealing core saturation correction can reflect the variation of core saturation in the process of pressure decline, which is in accordance with the change trend in the process of coring. In addition, the average relative error between the correction result and the calibrated saturation is 0. 8%. Therefore, the dynamic model can provide the reliable basis for analyzing the distribution of oil/water saturation of actual oil reservoirs.
引文
[1]郑力会,魏攀峰,张峥,聂帅帅,楼宣庆,崔可心,付毓伟.联探并采:非常规油气资源勘探开发持续发展自我救赎之路[J].天然气工业,2017,37(5):126-140.ZHENG Lihui,WEI Panfeng,ZHANG Zheng,NIEShuaishuai,LOU Xuanqing,CUI Kexin,FU Yuwei.Joint exploration and development:A self-salvation road to sustainable development of unconventional oil and gas resources Gas Industry[J].2017,37(5):126-140.
[2]李宝同.脉冲中子俘获测井求取饱和度精度研究[J].测井技术,1998,22(增刊):14-18.LI Baotong.The accuracy researches of pulse neutron capture logging to calculate oil saturation[J].Well Logging Technology,1998,22(S0):14-18.
[3]BOTSET H G,MUSKAT M,Effect of pressure reduction upon core saturation[J].Transactions of the Aime,1939,132(1):172-183.
[4]RATHMELL J J,BRAUN P H,PERKINS T K.Reservoir waterflood residual oil saturation from laboratory tests[J].Journal of Petroleum Technology,1973,25(2):175-185.
[5]贾振尧,范红康.密闭取心技术在油气田开发调整中的应用[J].断块油气田,1995,2(2):47-50.JIA Zhenyao,FAN Hongkang.The application of pressure coring technology in oil and gas field developing adjustment[J].Fault-Block Oil and Gas Field,1995,2(2):47-50.
[6]李开荣,薄万顺.密闭取心技术的新发展[J].石油钻采工艺,1998,20(2):36-38.LI Kairong,BO Wanshun.The new development of pressure coring technology[J].Oil Drilling&Production Technology.1998,20(2):36-38.
[7]马力宁,李江涛,华锐湘.保压取心储层流体饱和度分析方法--以柴达木盆地台南气田第四系生物成因气藏为例[J].天然气工业,2016,36(1):76-80.MA Lining,LI Jiangtao,HUA Ruixiang.An analysis method for reservoir flued saturation by pressrure coring:A case study from quaternary biogenetic gas reservoirs in the Tainan gas field,Qaidam Basin[J].Nature Gas Industry,2016,36(1):76-80.
[8]KAZERNI H.Determination of waterflood residual oil saturation from routine core analysis[J].Journal of Petroleum Technology,1977,29(1):31-32
[9]EGBOGAH E O,AMAEFULE J O.Correction factor for residual oil saturation from conventional cores[R].SPE38692,1997.
[10]杨胜来,胡学军,李辉.密闭取心流体饱和度误差的影响因素及修正方法[J].石油大学学报(自然科学版),2004,28(6):64-67.YANG Shenglai,HU Xuejun,LI Hui.The influence factors and correction method of fluid saturation error in pressure coring well[J].Journal of China University of Petroleum(Edition of Natural Science),2004,28(6):64-67.
[11]张亮.密闭取心井岩心饱和度校正物理模拟实验[J].油气地质与采收率,2009,16(2):94-95.ZHANG Liang.Physical simulation experiment of core saturation correction in pressure coring well[J].Petroleum Geology and Recovery Efficiency,2009,16(2):94-95.
[12]刘丽.基于物理模拟实验的密闭取心井油水饱和度校正[J].石油钻采工艺,2009,21(2):82-85.LIU Li.Oil-water saturation correction based on physical simulation experiments in pressure coring well[J].Oil Drilling and Production Technology,2009,21(2):82-85.
[13]叶青,查玉强,李凤颖.一种新的密闭取心饱和度校正方法研究[J].海洋石油,2016,36(3):30-35.YE Qing,CHA Yuqiang,LI Fengying.A new saturation correction methods research of pressure coring[J].Science Technology and Engineering.2016,36(3):30-35.
[14]马名臣,李建树.密闭取心井岩心油、水饱和度校正方法[J].石油勘探与开发,1993,20(4):102-105.MA Mingchen,LI Jianshu.A correction of oil and water saturation obtained from sealed core analysis[J].Petreleum Exploration and Development,1993,20(4):102-105.
[15]王艺景,黄华,刘志远,盖东玲.取心分析饱和度数理统计校正方法及其应用[J].江汉石油学院学报,2000,22(4):42-44.WANG Yijing,HUANG Hua,LIU Zhiyuan,GEDongling.Mathematical statistics correction method of core saturation and its application[J].Journal of Jianhan Petroleum Institute,2000,22(4):42-44.
[16]孙佩,崔式涛,刘佳庆.基于孔隙结构研究的密闭取心饱和度校正方法[J].岩性油气藏,2012,24(3):88-92.SUN Pei,CUI Shitao,LIU Jiaqing.Saturation correction method of pressure coring based on the research of pore structure[J].Lithologic Reservoirs,2012,24(3):88-92.
[17]辛治国,侯加根,冯伟光.密闭取心饱和度校正数学模型[J].吉林大学学报(地球科学版),2012,42(3):698-704.XIN Zhiguo,HOU Jiagen,FENG Weiguang.The mathematical model of saturation correction of pressure coring[J].Journal of Jilin University(Earth Science Edition),2012,42(3):698-704.
[18]程会明,李传亮,程呈.密闭取心饱和度校正方法研究[J].科学技术与工程,2012,12(20):4892-4895.CHENG Huiming,LI Chuanliang,CHENG Cheng.Correction method research of pressure coring saturation[J].Science Technology and Engineering,2012,12(20):4892-4895.
[19]王玉环.基于油水分流原理的密闭取心饱和度校正方法[J].科学技术与工程,2014,14(9):39-43.WANG Yuhuan.The correction methods of pressure coring based on the principle of oil and water diversion[J].Science Technology and Engineering,2014,14(9):39-43.
[20]马勇新,李文红,朱绍鹏.密闭取心饱和度校正新模型[J].中国海上油气,2016,28(2):78-92MA Xinyong,LI Wenhong,ZHU Shaopeng.The new saturation correction model of pressure coring[J].China Offshore Oil and Gas,2016,28(2):78-82.
[21]葛家理.油气层渗流力学[M].北京:石油工业出版社,1982:168.GE Jiali.Oil and gas percolation mechanics[M].Beijing:Petroleum Industry Press,1982:168.
[22]STONE H L.Probasility model for estimating threephase relative permeability[J].Journal of Petroleum Technology,1970,22(2):214-218.
[2]李宝同.脉冲中子俘获测井求取饱和度精度研究[J].测井技术,1998,22(增刊):14-18.LI Baotong.The accuracy researches of pulse neutron capture logging to calculate oil saturation[J].Well Logging Technology,1998,22(S0):14-18.
[3]BOTSET H G,MUSKAT M,Effect of pressure reduction upon core saturation[J].Transactions of the Aime,1939,132(1):172-183.
[4]RATHMELL J J,BRAUN P H,PERKINS T K.Reservoir waterflood residual oil saturation from laboratory tests[J].Journal of Petroleum Technology,1973,25(2):175-185.
[5]贾振尧,范红康.密闭取心技术在油气田开发调整中的应用[J].断块油气田,1995,2(2):47-50.JIA Zhenyao,FAN Hongkang.The application of pressure coring technology in oil and gas field developing adjustment[J].Fault-Block Oil and Gas Field,1995,2(2):47-50.
[6]李开荣,薄万顺.密闭取心技术的新发展[J].石油钻采工艺,1998,20(2):36-38.LI Kairong,BO Wanshun.The new development of pressure coring technology[J].Oil Drilling&Production Technology.1998,20(2):36-38.
[7]马力宁,李江涛,华锐湘.保压取心储层流体饱和度分析方法--以柴达木盆地台南气田第四系生物成因气藏为例[J].天然气工业,2016,36(1):76-80.MA Lining,LI Jiangtao,HUA Ruixiang.An analysis method for reservoir flued saturation by pressrure coring:A case study from quaternary biogenetic gas reservoirs in the Tainan gas field,Qaidam Basin[J].Nature Gas Industry,2016,36(1):76-80.
[8]KAZERNI H.Determination of waterflood residual oil saturation from routine core analysis[J].Journal of Petroleum Technology,1977,29(1):31-32
[9]EGBOGAH E O,AMAEFULE J O.Correction factor for residual oil saturation from conventional cores[R].SPE38692,1997.
[10]杨胜来,胡学军,李辉.密闭取心流体饱和度误差的影响因素及修正方法[J].石油大学学报(自然科学版),2004,28(6):64-67.YANG Shenglai,HU Xuejun,LI Hui.The influence factors and correction method of fluid saturation error in pressure coring well[J].Journal of China University of Petroleum(Edition of Natural Science),2004,28(6):64-67.
[11]张亮.密闭取心井岩心饱和度校正物理模拟实验[J].油气地质与采收率,2009,16(2):94-95.ZHANG Liang.Physical simulation experiment of core saturation correction in pressure coring well[J].Petroleum Geology and Recovery Efficiency,2009,16(2):94-95.
[12]刘丽.基于物理模拟实验的密闭取心井油水饱和度校正[J].石油钻采工艺,2009,21(2):82-85.LIU Li.Oil-water saturation correction based on physical simulation experiments in pressure coring well[J].Oil Drilling and Production Technology,2009,21(2):82-85.
[13]叶青,查玉强,李凤颖.一种新的密闭取心饱和度校正方法研究[J].海洋石油,2016,36(3):30-35.YE Qing,CHA Yuqiang,LI Fengying.A new saturation correction methods research of pressure coring[J].Science Technology and Engineering.2016,36(3):30-35.
[14]马名臣,李建树.密闭取心井岩心油、水饱和度校正方法[J].石油勘探与开发,1993,20(4):102-105.MA Mingchen,LI Jianshu.A correction of oil and water saturation obtained from sealed core analysis[J].Petreleum Exploration and Development,1993,20(4):102-105.
[15]王艺景,黄华,刘志远,盖东玲.取心分析饱和度数理统计校正方法及其应用[J].江汉石油学院学报,2000,22(4):42-44.WANG Yijing,HUANG Hua,LIU Zhiyuan,GEDongling.Mathematical statistics correction method of core saturation and its application[J].Journal of Jianhan Petroleum Institute,2000,22(4):42-44.
[16]孙佩,崔式涛,刘佳庆.基于孔隙结构研究的密闭取心饱和度校正方法[J].岩性油气藏,2012,24(3):88-92.SUN Pei,CUI Shitao,LIU Jiaqing.Saturation correction method of pressure coring based on the research of pore structure[J].Lithologic Reservoirs,2012,24(3):88-92.
[17]辛治国,侯加根,冯伟光.密闭取心饱和度校正数学模型[J].吉林大学学报(地球科学版),2012,42(3):698-704.XIN Zhiguo,HOU Jiagen,FENG Weiguang.The mathematical model of saturation correction of pressure coring[J].Journal of Jilin University(Earth Science Edition),2012,42(3):698-704.
[18]程会明,李传亮,程呈.密闭取心饱和度校正方法研究[J].科学技术与工程,2012,12(20):4892-4895.CHENG Huiming,LI Chuanliang,CHENG Cheng.Correction method research of pressure coring saturation[J].Science Technology and Engineering,2012,12(20):4892-4895.
[19]王玉环.基于油水分流原理的密闭取心饱和度校正方法[J].科学技术与工程,2014,14(9):39-43.WANG Yuhuan.The correction methods of pressure coring based on the principle of oil and water diversion[J].Science Technology and Engineering,2014,14(9):39-43.
[20]马勇新,李文红,朱绍鹏.密闭取心饱和度校正新模型[J].中国海上油气,2016,28(2):78-92MA Xinyong,LI Wenhong,ZHU Shaopeng.The new saturation correction model of pressure coring[J].China Offshore Oil and Gas,2016,28(2):78-82.
[21]葛家理.油气层渗流力学[M].北京:石油工业出版社,1982:168.GE Jiali.Oil and gas percolation mechanics[M].Beijing:Petroleum Industry Press,1982:168.
[22]STONE H L.Probasility model for estimating threephase relative permeability[J].Journal of Petroleum Technology,1970,22(2):214-218.
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