实际油藏条件下毛管力曲线测定方法
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摘要
研发高温高压毛管力曲线测定仪,使用地层水和含有溶解气的地层油,模拟油藏温度和压力条件,测定渗透率不同的3块岩心的地下毛管力曲线,并与压汞法得到的地下毛管力曲线进行对比。结果表明:由压汞毛管力曲线按照常规转换方法得到的地下毛管力曲线均比实测毛管力曲线低,两种曲线在曲线平缓段有较大差别,渗透率为(0.3~1.3)×10~(-3)μm~2的岩心,润湿相饱和度70%时毛管力差值为0.08~0.12 MPa;通过压汞毛管力曲线与实际毛管力曲线拟合,渗透率为(0.3~1.3)×10~(-3)μm~2的岩心实际转换系数为4~5(常规转换系数为7.26),渗透率越高的岩心拟合系数越低。
A high temperature and high pressure capillary pressure measurement apparatus was developed in this study,and the capillary pressure curve of rock samples with different permeability at reservoir condition was measured and compared with that converted from a mercury injection method. Live oil containing solution gas and real reservoir water were used in these measurements. The results show that the reservoir capillary pressure converted from the mercury injection method was lower than that measured using the new apparatus.There is a significant difference on the flat section of the capillary pressure curves measured by the two methods,which is about 0.08-0.12 MPa at wetting saturation of 70% for the cores with permeability of( 0.3-1.3) ×10~(-3)μm~2. When the real capillary curves with those measured using the mercury injection method fit well,the ratio of the capillary pressures from the two methods( the conversion factor) is about 4-5,lower than the conventional value of 7.26. The higher the permeability of the rock is,the lower the conversion factor.
A high temperature and high pressure capillary pressure measurement apparatus was developed in this study,and the capillary pressure curve of rock samples with different permeability at reservoir condition was measured and compared with that converted from a mercury injection method. Live oil containing solution gas and real reservoir water were used in these measurements. The results show that the reservoir capillary pressure converted from the mercury injection method was lower than that measured using the new apparatus.There is a significant difference on the flat section of the capillary pressure curves measured by the two methods,which is about 0.08-0.12 MPa at wetting saturation of 70% for the cores with permeability of( 0.3-1.3) ×10~(-3)μm~2. When the real capillary curves with those measured using the mercury injection method fit well,the ratio of the capillary pressures from the two methods( the conversion factor) is about 4-5,lower than the conventional value of 7.26. The higher the permeability of the rock is,the lower the conversion factor.
引文
[1]李爱芬.油层物理学[M].东营:中国石油大学出版社,2015:257-290.
[2]肖亮,刘晓鹏,毛志强.结合NMR和毛管压力资料计算储层渗透率的方法[J].石油学报,2009,30(1):100-103.XIAO Liang,LIU Xiaopeng,MAO Zhiqiang.A computation method for reservoir permeability by combining NMR log and capillary pressure data[J].Acta Petrolei Sinica,2009,30(1):100-103.
[3]吴克柳,李相方,樊兆琪,等.低渗-特低渗油藏非稳态油水相对渗透率计算模型[J].中国石油大学学报(自然科学版),2013,37(6):76-81.WU Keliu,LI Xiangfang,FAN Zhaoqi,et al.Unsteadystate model for calculating oil-water relative permeability for reservoirs with low and ultra-low permeability[J].Journal of China University of Petroleum(Edition of Natural Science),2013,37(6):76-81.
[4]刘晓鹏,肖亮,张伟.储层毛管压力曲线构造方法及其应用[J].西南石油大学学报(自然科学版),2008,30(6):126-130.LIU Xiaopeng,XIAO Liang,ZHANG Wei.Constructing method and application of reservoir capillary pressure curve[J].Journal of Southwest Petroleum University(Science&Technology Edition),2008,30(6):126-130.
[5]孙士孝,郭云尧,秦积舜.应用高压半渗透隔板法测得的毛细管压力数据评价地层伤害程度[J].石油大学学报(自然科学版),1990,14(5):9-14.SUN Shixiao,GUO Yunyao,QIN Jishun.Formation damage evaluation with capillary pressure data obtained by high pressure diaphragm method[J].Journal of the University of Petroleum,China(Edition of Natural Science),1990,14(5):9-14.
[6]NEWSHAM K E,RUSHING J A.A comparative study of laboratory techniques for measuring capillary pressures in tight gas sands[R].SPE 89866,2004.
[7]Jr JENNINGS J W,MCGREGOR D S,MORSE R A.Simultaneous determination of capillary pressure and relative permeability by automatic history matching[J].SPE Formation Evaluation,1988,3(2):322-328.
[8]WIBEKE L H,SVEIN M S.Improvement of diaphragm method for drainage capillary pressure measurement with micro pore membrane:The Third European Core Analysis Symposium,Paris,1992[C].SCA,1992.
[9]GUO Y,HAMMERVOLD W L.Equilibration time and accuracy of capillary pressure measurement using diaphragm method:SPWLA 34th Annual Logging Symposium,Calgary,1993[C].Society of Petrophysicists and Well-Log Analysts,1993.
[10]张祖波,洪颖,罗蔓.岩石毛管压力曲线的测定:SY/T5346-2005[S].北京:石油工业出版社,2005.
[11]张人雄,李晓梅,王正欣,等.单向水平流动压汞与常规压汞技术对比研究[J].石油勘探与开发,1998,25(6):61-66.ZHANG Renxiong,LI Xiaomei,WANG Zhengxin,et al.A comparison between single-phase horizontal flow Hg-injectionand conventional Hg-injection techniques[J].Petroleum Exploration and Development,1998,25(6):61-66.
[12]李爱芬,付帅师,张东.高温高压条件下油藏毛管压力曲线测定仪:CN201210087161.X[P].2014-05-14.
[13]李艳红,王升宝,常丽萍.表(界)面张力测定方法的研究进展[J].日用化学工业,2007,37(2):102-106.LI Yanhong,WANG Shengbao,CHANG Liping.Research progress on methods for measurement of surface(interfacial)tension[J].China Surfactant Detergent&Cosmetics,2007,37(2):102-106.
[14]丁晓峰,管蓉,陈沛智.接触角测量技术的最新进展[J].理化检验-物理分册,2008,44(2):84-89.DING Xiaofeng,GUAN Rong,CHEN Peizhi.Recent development of contact angle mesasurement technigque[J].PTCA,2008,44(2):84-89.
[2]肖亮,刘晓鹏,毛志强.结合NMR和毛管压力资料计算储层渗透率的方法[J].石油学报,2009,30(1):100-103.XIAO Liang,LIU Xiaopeng,MAO Zhiqiang.A computation method for reservoir permeability by combining NMR log and capillary pressure data[J].Acta Petrolei Sinica,2009,30(1):100-103.
[3]吴克柳,李相方,樊兆琪,等.低渗-特低渗油藏非稳态油水相对渗透率计算模型[J].中国石油大学学报(自然科学版),2013,37(6):76-81.WU Keliu,LI Xiangfang,FAN Zhaoqi,et al.Unsteadystate model for calculating oil-water relative permeability for reservoirs with low and ultra-low permeability[J].Journal of China University of Petroleum(Edition of Natural Science),2013,37(6):76-81.
[4]刘晓鹏,肖亮,张伟.储层毛管压力曲线构造方法及其应用[J].西南石油大学学报(自然科学版),2008,30(6):126-130.LIU Xiaopeng,XIAO Liang,ZHANG Wei.Constructing method and application of reservoir capillary pressure curve[J].Journal of Southwest Petroleum University(Science&Technology Edition),2008,30(6):126-130.
[5]孙士孝,郭云尧,秦积舜.应用高压半渗透隔板法测得的毛细管压力数据评价地层伤害程度[J].石油大学学报(自然科学版),1990,14(5):9-14.SUN Shixiao,GUO Yunyao,QIN Jishun.Formation damage evaluation with capillary pressure data obtained by high pressure diaphragm method[J].Journal of the University of Petroleum,China(Edition of Natural Science),1990,14(5):9-14.
[6]NEWSHAM K E,RUSHING J A.A comparative study of laboratory techniques for measuring capillary pressures in tight gas sands[R].SPE 89866,2004.
[7]Jr JENNINGS J W,MCGREGOR D S,MORSE R A.Simultaneous determination of capillary pressure and relative permeability by automatic history matching[J].SPE Formation Evaluation,1988,3(2):322-328.
[8]WIBEKE L H,SVEIN M S.Improvement of diaphragm method for drainage capillary pressure measurement with micro pore membrane:The Third European Core Analysis Symposium,Paris,1992[C].SCA,1992.
[9]GUO Y,HAMMERVOLD W L.Equilibration time and accuracy of capillary pressure measurement using diaphragm method:SPWLA 34th Annual Logging Symposium,Calgary,1993[C].Society of Petrophysicists and Well-Log Analysts,1993.
[10]张祖波,洪颖,罗蔓.岩石毛管压力曲线的测定:SY/T5346-2005[S].北京:石油工业出版社,2005.
[11]张人雄,李晓梅,王正欣,等.单向水平流动压汞与常规压汞技术对比研究[J].石油勘探与开发,1998,25(6):61-66.ZHANG Renxiong,LI Xiaomei,WANG Zhengxin,et al.A comparison between single-phase horizontal flow Hg-injectionand conventional Hg-injection techniques[J].Petroleum Exploration and Development,1998,25(6):61-66.
[12]李爱芬,付帅师,张东.高温高压条件下油藏毛管压力曲线测定仪:CN201210087161.X[P].2014-05-14.
[13]李艳红,王升宝,常丽萍.表(界)面张力测定方法的研究进展[J].日用化学工业,2007,37(2):102-106.LI Yanhong,WANG Shengbao,CHANG Liping.Research progress on methods for measurement of surface(interfacial)tension[J].China Surfactant Detergent&Cosmetics,2007,37(2):102-106.
[14]丁晓峰,管蓉,陈沛智.接触角测量技术的最新进展[J].理化检验-物理分册,2008,44(2):84-89.DING Xiaofeng,GUAN Rong,CHEN Peizhi.Recent development of contact angle mesasurement technigque[J].PTCA,2008,44(2):84-89.