油藏各向异性对鱼骨状分支井产能影响分析
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摘要
为了研究油藏各向异性对鱼骨状分支井产能的影响,基于空间变换理论将各向异性渗透率空间转换为各向同性渗透率空间,并应用鱼骨状分支井渗流模型进行产能预测。结果表明:油藏各向异性会导致鱼骨状分支井等压线分布发生明显偏转,各向异性程度越大,偏转越明显;水平面内垂直于主井筒方向的渗透率对鱼骨状分支井产能起决定作用,水平面内平行于主井筒方向的渗透率起次要作用;当水平面内渗透率各向异性较为明确时,应选择主井筒方向与最大渗透率方向垂直;当水平面内渗透率各向异性不明确时,选择的分支角度越大,越能消除水平面内渗透率各向异性不确定性带来的影响。
In order to study the influences of reservoir anisotropy on the productivity of herringbone multi-lateralwell,based on the theory of coordination conversion,anisotropic permeability space is transformed into isotropicpermeability space,and prediction is made about the productivity of herringbone multi-lateral wells with percolationmodel.It can be conclude that:Reservoir anisotropy can change the pressure distribution dramatically.The greateranisotropy is,the more obvious deflexion there is;The permeability which is perpendicular to the main bore ofherringbone multi-lateral well plays the most important role on the productivity.The permeability which parallel tothe main bore of herringbone multi-lateral well plays a secondary role on the productivity.When the anisotropy isclear,the direction of the main bore of herringbone multi-lateral well should be perpendicular to the direction of themain permeability.When the anisotropy is unknown,a big branch angle should be picked to eliminate the influencesof anisotropy.
In order to study the influences of reservoir anisotropy on the productivity of herringbone multi-lateralwell,based on the theory of coordination conversion,anisotropic permeability space is transformed into isotropicpermeability space,and prediction is made about the productivity of herringbone multi-lateral wells with percolationmodel.It can be conclude that:Reservoir anisotropy can change the pressure distribution dramatically.The greateranisotropy is,the more obvious deflexion there is;The permeability which is perpendicular to the main bore ofherringbone multi-lateral well plays the most important role on the productivity.The permeability which parallel tothe main bore of herringbone multi-lateral well plays a secondary role on the productivity.When the anisotropy isclear,the direction of the main bore of herringbone multi-lateral well should be perpendicular to the direction of themain permeability.When the anisotropy is unknown,a big branch angle should be picked to eliminate the influencesof anisotropy.
引文
[1]吴晓东,安永生,席长丰.煤层气羽状水平井数值模拟新方法[J].天然气工业,2007,27(7):76–78.
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[18]刘月田.各向异性油藏水平井渗流和产能分析[J].石油大学学报:自然科学版,2002,26(4):40–44,47.
[19]葛家理,宁正福,刘月田,等.现代油藏渗流力学原理[M].北京:石油工业出版社,2001.
[20]范学平,任书泉.水平井渗流分析[J].西南石油学院学报,1995,17(2):72–77.
[2]韩国庆,吴晓东,陈昊,等.多层非均质油藏双分支井产能影响因素分析[J].石油大学学报:自然科学版,2004,28(4):81–85.
[3]范玉平,韩国庆,杨长春.鱼骨井产能预测及分支井形态优化[J].石油学报,2006,27(4):101–104.
[4]何志雄,蒋开,李闽,等.鱼骨气井不稳定产能预测新模型[J].新疆石油地质,2010,31(6):610–613.
[5]安永生,吴晓东,韩国庆.基于混合PEBI网格的复杂井数值模拟应用研究[J].中国石油大学学报:自然科学版,2007,31(6):60–63.
[6]张虹,沈忠民.超致密裂缝性储层地震预测方法研究以川西新场气田须二气藏勘探为例[J].成都理工大学学报:自然科学版,2008,35(2):149–157.
[7]孙婵,吴晓东,安永生,等.低渗透油藏鱼骨刺井井型优化与产能对比[J].石油钻采工艺,2010,32(1):61–64.
[8]杨占伟,程时清,赵志明.多分支水平井产能计算[J].石油钻采工艺,2009,31(6):73–77.
[9]张文波,郭敏,李桂花.基于VTI介质模型的井间地震建模方法[J].地球科学与环境学报,2008,30(3):301–304,318.
[10]程林松,李春兰,郎兆新,等.分支水平井产能的研究[J].石油学报,1995,16(2):49–55.
[11]赵燕.复杂多分支水平井产能预测[D].山东东营:中国石油大学,2009.
[12]郎兆新,张丽华,程林松,等.多井底水平井渗流问题某些解析解[J].石油大学学报:自然科学版,1993,17(4):40–47.
[13]曲占庆,许霞,刘建敏,等.辐射状分支井产能电模拟实验研究[J].西安石油大学学报:自然科学版,2007,22(4):65–68,71.
[14]Besson J.Performance of slanted and horizontal wells onan anisotropic media[C].SPE 20965,1990.
[15]Retnanto A,Economides M J.Performance of multiplehorizontal well laterals in low-to-medium permeabilityreservoirs[C].SPE 29647,1996.
[16]Salas J R,Clifford P J,Jenkins D P.Multilateral well per-formance prediction[C].SPE 35711,1996.
[17]Retnanto A,Frick T P,Brand C W,et al.Optimal con-figurations of multiple-lateral horizontal wells[C].SPE35712,1996.
[18]刘月田.各向异性油藏水平井渗流和产能分析[J].石油大学学报:自然科学版,2002,26(4):40–44,47.
[19]葛家理,宁正福,刘月田,等.现代油藏渗流力学原理[M].北京:石油工业出版社,2001.
[20]范学平,任书泉.水平井渗流分析[J].西南石油学院学报,1995,17(2):72–77.
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