天然裂缝性油藏数值模拟研究新方法  

The new determination on Numerical simulation study for naturally fractured reservoirs

作　　者：黄灿[1,2] 许发年[1] 卢文涛[1] 

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北武汉4302002 [2]石油工程教育部重点实验室中国石油大学,北京102249

出　　处：《内蒙古石油化工》2013年第19期3-6,共4页Inner Mongolia Petrochemical Industry

摘　　要：天然裂缝性油藏的开发离不开油藏数值模拟技术的快速进步,由于天然裂缝性油藏本身的复杂性,目前对天然裂缝性油藏的数值模拟可以大致分为连续性模型和离散性模型两大类;连续性模型又可以分为双重介质模型和单介质模型,双重介质模型主要是以Barrenblatt和Warren-Root在20世纪60年代提出的双重孔隙/双重渗透模型为基础,在此类模型中认为油藏中任意一点都存在有基质和裂缝两种介质,基质被相互平行排列的裂缝分割成单个的岩块,每种介质都存在独立的水动力场,通过两种介质间的窜流的将基质和裂缝联系起来;而对于单介质模型,则是通过某种方法将裂缝的渗透率和基质的渗透率进行综合考虑,得出整个油田的平均有效渗透率,该有效渗透率考虑了裂缝的密度、方位以及宽度等的影响,然后将该有效渗透率输入到普通的单一介质模拟器中来对裂缝性油藏进行模拟计算。这种方法的特点是数学上比较简单,灵活性比较强,同时由于该模型只对其连接的两个网格有影响,所以改变模型的传导率只会影响其中一个方向的传导性,而不会像常规的模拟器那样要同时影响两边的传导性,但是该方法目前研究较少。Naturally fractured reservoir development is inseparable from the reservoir numerical simulation of rapid technological progress,due to the complexity of the naturally fractured reservoir numerical simulation of naturally fractured reservoirs can be roughly divided into a continuous model anddiscrete model two categories;continuity model can be divided into dual media model and the single-medium model,dual media model and Warren Barrenblatt-root in the 1960sdual porosity/dual permeability model,This type of model that the reservoir at any point there are matrix and fracture of two media,the matrix is??arranged in parallel to each other cracks into individual blocks,each media,there were separate hydrodynamic field between two mediachanneling the matrix and fracture linked;for single-medium model,is a way to crack permeability and matrix permeability into account,drawn across the field,the average effective permeability,the effective penetrationthe rate takes into account the crack density,orientation,and width,and then input to the effective permeability the ordinary single media simulator for fractured reservoir simulation.Feature of this method is to compare mathematically simple,relatively strong flexibility,affect the same time as the model which is connected to two grid,so change the conductivity of the model will only affect the conductivity in one direction,rather than like a conventional simulator simultaneously affect both conductivity,but the method of the present study less.

关 键 词：裂缝性油藏 传导率 等效介质 基质 

分 类 号：TE319[石油与天然气工程—油气田开发工程]