高盐油藏开发期饱和度计算的矿化度驱替-交换模型
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摘要
注水开发过程中油藏混合液矿化度的变化受注入水驱替和离子交换控制。水淹初期,矿化度变化受孔隙体积中的注入水比例影响;随着注水时间和注水倍数增加,注入水和原生水之间的离子交换程度不断增加。首次提出矿化度驱替-交换理论模型,确定出混合液矿化度与目前含油饱和度、原生水矿化度、注入水矿化度的关系图版,模拟研究水淹过程中电阻率的变化规律。利用这一理论模型和图版,结合电法测井,采用迭代计算或联合求解的方法,消除剩余油饱和度计算中存在的多解性问题,提高饱和度和矿化度的计算精度,在多个大中型油藏水淹层解释中取得良好的应用效果。
The salinity change of mixed liquid in reservoir is controlled by injection water displacement and ion exchange during water-flooding.In the initial stage of flooding,the change is mainly affected by the proportion of injected wate in pore volume;with the increase of water injection time and water injection volume,the degree of ion exchange between injected water and primary water is also increasing.The displacement-exchange theory model of salinity is proposed for the first time,and the relationship charts between the salinity of the mixed fuilds and the current oil saturation,the salinity of primary water,as well as the salinity of the injected water are established.Moreover,the change rule of resistivity during waterflooding is also simulated.Based on the theoretical model,charts and electrical logging,iterative computation or joint problem-solving method is used to eliminate the multi-solution problem in the calculation of the remaining oil saturation,which improve the calculation accuracy of saturation and salinity.This method has achieved good results in the interpretation of water flooded layers in multiple large and medium-sized reservoirs.
The salinity change of mixed liquid in reservoir is controlled by injection water displacement and ion exchange during water-flooding.In the initial stage of flooding,the change is mainly affected by the proportion of injected wate in pore volume;with the increase of water injection time and water injection volume,the degree of ion exchange between injected water and primary water is also increasing.The displacement-exchange theory model of salinity is proposed for the first time,and the relationship charts between the salinity of the mixed fuilds and the current oil saturation,the salinity of primary water,as well as the salinity of the injected water are established.Moreover,the change rule of resistivity during waterflooding is also simulated.Based on the theoretical model,charts and electrical logging,iterative computation or joint problem-solving method is used to eliminate the multi-solution problem in the calculation of the remaining oil saturation,which improve the calculation accuracy of saturation and salinity.This method has achieved good results in the interpretation of water flooded layers in multiple large and medium-sized reservoirs.
引文
[1]孙建孟,王克文,朱家俊.济阳坳陷低电阻率储层电性微观影响因素研究[J].石油学报,2006,27(5):61-65.
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[3]李汉川,荆万学,张海宁,等.基于近井壁自然电位的大庆油田水淹储层地层水电阻率计算方法[J].测井技术,2017,41(1):41-45.
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[11]唐文忠,陈彬,翟雨阳,等.深度延迟人工神经网络判别水淹程度[J].石油与天然气地质,2001,22(3):249-252.
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[13]ZHANG X A,WANG Z W.Distinguishing Oil and Water Layers by Interpreting Acoustic Logging Data with Changing Well Diameters[J].Geophysical Prospecting,2015,63(3):669-679.
[14]李来林,陈小宏,李延峰.利用振幅谱差识别水淹层的变化[J].地球物理学报,2007,50(6):1899-1904.
[15]ARCHIE G E.The Electrical Resistivity Log as an Aid in Determining Some Reservoir Characteristics[J].AIME,1942,146:54-61.
[16]孙建孟,王克文,李伟.测井饱和度解释模型发展及分析[J].石油勘探与开发,2008,35(1):101-107.
[17]许长福,刘红现,钱根宝,等.克拉玛依砾岩储集层微观水驱油机理[J].石油勘探与开发,2011,38(6):725-732.
[18]FAN Y R,DENG H G,ZHOU C C,et al.Experimental Study and Theoretical Analyses of Formation Resistivity under Fresh Water Flooding[C]∥SPWLA42nd Annual Logging Symposium,2011.
[19]唐文生,符晓颖,张高久,等.南阳油田高阻水淹层成因与解释方法浅探[J].测井技术,1998,22(3):53-57.
[20]DANG C,LONG N,NGUYEN N,et al.Mechanistic Modeling of Low Salinity Water Flooding[J].Petroleum Science&Engineering,2016,146:209.
[21]李春霞,唐文生,张超谟,等.用测井资料确定储层润湿性及对应的水淹层评价模型[J].测井技术,2010,34(3):284-288.
[22]SHADDEL S,TABATABAE-NEJAD S A,FATHI S J.Low-salinity Water Flooding:Evaluating The Effect of Salinity on Oil and Water Relative Permeability,Wettability,and Oil Recovery[J].Special Topics&Reviews in Porous Media,2014,5(2):133-143.
[23]XU F,MU L X,WU X H,et al.New Expression of Oil/Water Relative Permeability Ratio vs Water Saturation and Its Application in Water Flooding Curve[J].Energy Exploration&Exploitation,2014,32(5):817-830.
[24]SHENG C W,DONG W.The Research for Method to Determine Interpretation Standard of Water Flooded Layer at the High Water-cut Stage[J].Advances in Petroleum Exploration and Development,2015,9(2):103-106.
[2]刘中奇,崔琳,董婷,等.孤岛油田水淹层地层水电阻率计算方法研究[J].测井技术,2012,36(1):37-40.
[3]李汉川,荆万学,张海宁,等.基于近井壁自然电位的大庆油田水淹储层地层水电阻率计算方法[J].测井技术,2017,41(1):41-45.
[4]杨瑞明,王良书,徐正顺,等.大庆油田高含水期自然电位的变异和校正[J].石油勘探与开发,2003,30(1):60-61.
[5]牛超群,张守谦,郭余峰,等.自然电流测井机理的研究[J].石油学报,1987,8(4):56-64.
[6]唐文生,欧阳健,刘兴礼,等.天然水淹油藏的测井分析[J].测井技术,1995,19(6):421-427.
[7]蔡志杰,陈娓,李大潜,等.三维自然电位测井的数学模型与求解方法[J].测井技术,2017,41(1):20-25.
[8]高兴军,于兴河,李胜利,等.利用神经网络技术预测剩余油分布[J].石油学报,2005,26(3):60-63.
[9]丰全,罗娜.大庆长垣水淹层测井评价技术的研究[J].石油学报,1998,19(3):68-72.
[10]宋考平,吴玉树,计秉玉.水驱油藏剩余油饱和度分布预测的函数法[J].石油学报,2006,27(3):91-95.
[11]唐文忠,陈彬,翟雨阳,等.深度延迟人工神经网络判别水淹程度[J].石油与天然气地质,2001,22(3):249-252.
[12]CHEN S L.The Application of Comprehensive Fuzzy Judgement in the Interpretation of Water-flooded Reservoirs[J].Fuzzy Mathematics,2001,9(3):739-743.
[13]ZHANG X A,WANG Z W.Distinguishing Oil and Water Layers by Interpreting Acoustic Logging Data with Changing Well Diameters[J].Geophysical Prospecting,2015,63(3):669-679.
[14]李来林,陈小宏,李延峰.利用振幅谱差识别水淹层的变化[J].地球物理学报,2007,50(6):1899-1904.
[15]ARCHIE G E.The Electrical Resistivity Log as an Aid in Determining Some Reservoir Characteristics[J].AIME,1942,146:54-61.
[16]孙建孟,王克文,李伟.测井饱和度解释模型发展及分析[J].石油勘探与开发,2008,35(1):101-107.
[17]许长福,刘红现,钱根宝,等.克拉玛依砾岩储集层微观水驱油机理[J].石油勘探与开发,2011,38(6):725-732.
[18]FAN Y R,DENG H G,ZHOU C C,et al.Experimental Study and Theoretical Analyses of Formation Resistivity under Fresh Water Flooding[C]∥SPWLA42nd Annual Logging Symposium,2011.
[19]唐文生,符晓颖,张高久,等.南阳油田高阻水淹层成因与解释方法浅探[J].测井技术,1998,22(3):53-57.
[20]DANG C,LONG N,NGUYEN N,et al.Mechanistic Modeling of Low Salinity Water Flooding[J].Petroleum Science&Engineering,2016,146:209.
[21]李春霞,唐文生,张超谟,等.用测井资料确定储层润湿性及对应的水淹层评价模型[J].测井技术,2010,34(3):284-288.
[22]SHADDEL S,TABATABAE-NEJAD S A,FATHI S J.Low-salinity Water Flooding:Evaluating The Effect of Salinity on Oil and Water Relative Permeability,Wettability,and Oil Recovery[J].Special Topics&Reviews in Porous Media,2014,5(2):133-143.
[23]XU F,MU L X,WU X H,et al.New Expression of Oil/Water Relative Permeability Ratio vs Water Saturation and Its Application in Water Flooding Curve[J].Energy Exploration&Exploitation,2014,32(5):817-830.
[24]SHENG C W,DONG W.The Research for Method to Determine Interpretation Standard of Water Flooded Layer at the High Water-cut Stage[J].Advances in Petroleum Exploration and Development,2015,9(2):103-106.