基于网格过水倍数提高油藏历史拟合精度的方法
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摘要
在高含水油藏历史拟合过程中,为了表示水体对岩石孔隙冲刷的影响,往往分阶段进行相渗标定。由于油藏内水驱的不均匀性,统一改变相渗会使水体尚未波及的区域含水上升速度加快,从而影响拟合效果。本文提出采用网格过水倍数来选择不同相渗曲线的方法。网格过水倍数为数值模拟模型中单个网格累积通过水的体积与网格孔隙体积之比,该参数不仅刻画了水驱波及范围,而且描述了波及范围内的水驱强度。在油田开发过程中,随着孔隙过水倍数增加,岩石亲水性增强,相渗曲线向右移动,水相相对渗透率增加。为了模拟储层物性的时变特征,将实验得到的不同过水倍数的相渗曲线输入数值模拟模型中,根据网格过水倍数选取不同的相渗曲线进行拟合,提高了油藏高含水阶段历史拟合精度,对高含水期提高油藏驱油效率和采收率具有重要意义。
In the process of high water cut reservoirhistory matching,the relative permeabilitycurves are often calibrated in stagesto express thewash and brush effect of aquifer on pore structure.Because of the non-uniformity of the water flooding in the reservoir,the uniform change of relative permeability will increase the water cut of the area wherehas not been affected by the aquifer,affecting the historical matching result.In this paper,a method of selecting different relative permeability curves is proposed by using the gird displacing multiple factor.The gird displacing multiple factor is the ratio of the accumulated volume of water flowing through individual grid to the pore volume of this grid in a numerical simulation model.It not only describes the distribution of the water flooding area,but also indicates the flooding strength.The more the volume of aquifer water flow throughthe pore,the higher the rock hydrophilicity gets.As a result,water relative permeability increases with the relative permeability curve shifts to the right.During the numerical simulation process,different relative permeability curves obtained by the experiments are entered into the model,and the selection of the curve for each grid is based on displacing multiple factor.This method has improved the model historical matching precision on the reservoir high watercut stage.It has great importanceonthe increase of the oil displacement efficiency and the oil recovery of during the high water cut period.
In the process of high water cut reservoirhistory matching,the relative permeabilitycurves are often calibrated in stagesto express thewash and brush effect of aquifer on pore structure.Because of the non-uniformity of the water flooding in the reservoir,the uniform change of relative permeability will increase the water cut of the area wherehas not been affected by the aquifer,affecting the historical matching result.In this paper,a method of selecting different relative permeability curves is proposed by using the gird displacing multiple factor.The gird displacing multiple factor is the ratio of the accumulated volume of water flowing through individual grid to the pore volume of this grid in a numerical simulation model.It not only describes the distribution of the water flooding area,but also indicates the flooding strength.The more the volume of aquifer water flow throughthe pore,the higher the rock hydrophilicity gets.As a result,water relative permeability increases with the relative permeability curve shifts to the right.During the numerical simulation process,different relative permeability curves obtained by the experiments are entered into the model,and the selection of the curve for each grid is based on displacing multiple factor.This method has improved the model historical matching precision on the reservoir high watercut stage.It has great importanceonthe increase of the oil displacement efficiency and the oil recovery of during the high water cut period.
引文
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[14]胡慧芳.油藏数值模拟历史拟合质量评价方法[J].断块油气田,2012,19(3):354-358.HU Huifang.Quality evaluation method on history matching of reservoir numerical simulation[J].FaultBlock Oil and Gas Field,2012,19(3):354-358.(in Chinese)
[15]陈燕虎,侯玉培,许强,等.特高含水期油藏数值模拟应用技术探讨---以胜二区为例[J].科学技术与工程,2014,14(5):215-218.CHEN Yanhu,HOU Yupei,XU Qiang,et al.Discussion on the numerical simulation applied technologies at extra-high water-cut stage:taking the second region of Shengtuo Oilfield as example[J].Science Technology and Engineering,2014,14(5):215-218.(in Chinese)
[16]于洪敏,王友启,聂俊,等.高注水倍数相对渗透率曲线校正方法研究及应用[J].石油钻探技术,2018,46(4):104-108.YU Hongmin,WANG Youqi,NIE Jun,et al.Study and application of a correction method for the relative permeability curve of a high water injection multiple[J].Petroleum Drilling Techniques,2018,46(4):104-108.(in Chinese)
[17]邴绍献.特高含水期相渗关系表征研究[J].石油天然气学报,2012,34(10):118-120.BING Shaoxian.Study on relative permeability equation adapted at ultra-high water-cut stage[J].Journal of Oil and Gas Technology,2012,34(10):118-120.(in Chinese)
[2]廉培庆,程林松,刘丽芳.裂缝性碳酸盐岩油藏相对渗透率曲线[J].石油学报,2011,32(6):1026-1030.LIAN Peiqing,CHENG Linsong,LIU Lifang.The relative permeability curve of fractured carbonate reservoirs[J].Acta Petrolei Sinica,2011,32(6):1026-1030.(in Chinese)
[3]周志军,薛江龙,赵立斌.数值模拟拟合精度方法研究---以龙虎泡油田为例[J].岩性油气藏,2016,28(1):101-105.ZHOU Zhijun,XUE Jianglong,ZHAO Libin.Numerical simulation fitting technology:a case study from Longhupao oilfield[J].Lithologic Reservoirs,2016,28(1):101-105.(in Chinese)
[4]文鑫,戴宗,王华,等.海相砂岩油藏长期水驱后储层物性变化规律[J].特种油气藏,2017,24(1):157-161.WEN Xin,DAI Zong,WANG Hua,et al.Physical properties of marine sandstone reservoir after long-term waterflooding[J].Special Oil and Gas Reservoirs,2017,24(1):157-161.(in Chinese)
[5]BABADAGLI T.Development of mature oil fields-a review[J].Journal of Petroleum Science and Engineering,2007,57(3/4):221-246.
[6]吴聃,鞠斌山,陈常红,等.基于微观驱替实验的剩余油表征方法研究[J].中国科技论文,2015,10(23):2707-2710.WU Dan,JU Binshan,CHEN Changhong,et al.Research on characterization method for residual oil based on microscopic displacement experiments[J].China Sciencepaper,2015,10(23):2707-2710.(in Chinese)
[7]赵俊威,徐怀民,何翠,等.基于开发流体势场的低渗储层剩余油分布研究[J].中国科技论文,2016,11(15):1693-1698.ZHAO Junwei,XU Huaimin,HE Cui,et al.Research on remaining oil distribution in low permealility reservoir based on development fluid potential field[J].China Sciencepaper,2016,11(15):1693-1698.(in Chinese)
[8]廉培庆,李琳琳,程林松.气顶边水油藏剩余油分布模式及挖潜对策[J].油气地质与采收率,2012,19(3):101-103.LIAN Peiqing,LI Linlin,CHENG Linsong.The modes of remaining oil and development strategies in gas cap and edge water reservoir[J].Petroleum Geology and Recovery Efficiency,2012,19(3):101-103.(in Chinese)
[9]姜瑞忠,乔欣,滕文超,等.储层物性时变对油藏水驱开发的影响[J].断块油气田,2016,23(6):768-771.JIANG Ruizhong,QIAO Xin,TENG Wenchao,et al.Impact of physical properties time variation on waterflooding reservoir development[J].Fault-Block Oil and Gas Field,2016,23(6):768-771.(in Chinese)
[10]郑金定,刘德华.水驱油藏过水倍数分布及其改善方法研究[J].科学技术与工程,2014,14(18):219-222.ZHENG Jinding,LIU Dehua.Study of displacing water multiple distribution and improvements in water-flooding reservoir[J].Science Technology and Engineering,2014,14(18):219-222.(in Chinese)
[11]许强,陈燕虎,侯玉培,等.特高含水后期油藏时变数值模拟处理方法研究[J].钻采工艺,2015,38(5):41-43.XU Qiang,CHEN Yanhu,HOU Yupei,et al.Research on numerical simulation processing model based on reservoir time varying physical properties and seepage in extra high water cut stage[J].Drilling and Production Technology,2015,38(5):41-43.(in Chinese)
[12]于金彪.油藏数值模拟历史拟合分析方法[J].油气地质与采收率,2017,24(3):66-70.YU Jinbiao.History matching analysis method on reservoir numerical simulation[J].Petroleum Geologyand Recovery Efficiency,2017,24(3):66-70.(in Chinese)
[13]朱焱,谢进庄,杨为华,等.提高油藏数值模拟历史拟合精度的方法[J].石油勘探与开发,2008,35(2):225-229.ZHU Yan,XIE Jinzhuang,YANG Weihua,et al.Method for improving history matching precision of reservoir numerical simulation[J].Petroleum Exploration and Development,2008,35(2):225-229.(in Chinese)
[14]胡慧芳.油藏数值模拟历史拟合质量评价方法[J].断块油气田,2012,19(3):354-358.HU Huifang.Quality evaluation method on history matching of reservoir numerical simulation[J].FaultBlock Oil and Gas Field,2012,19(3):354-358.(in Chinese)
[15]陈燕虎,侯玉培,许强,等.特高含水期油藏数值模拟应用技术探讨---以胜二区为例[J].科学技术与工程,2014,14(5):215-218.CHEN Yanhu,HOU Yupei,XU Qiang,et al.Discussion on the numerical simulation applied technologies at extra-high water-cut stage:taking the second region of Shengtuo Oilfield as example[J].Science Technology and Engineering,2014,14(5):215-218.(in Chinese)
[16]于洪敏,王友启,聂俊,等.高注水倍数相对渗透率曲线校正方法研究及应用[J].石油钻探技术,2018,46(4):104-108.YU Hongmin,WANG Youqi,NIE Jun,et al.Study and application of a correction method for the relative permeability curve of a high water injection multiple[J].Petroleum Drilling Techniques,2018,46(4):104-108.(in Chinese)
[17]邴绍献.特高含水期相渗关系表征研究[J].石油天然气学报,2012,34(10):118-120.BING Shaoxian.Study on relative permeability equation adapted at ultra-high water-cut stage[J].Journal of Oil and Gas Technology,2012,34(10):118-120.(in Chinese)