摘要
岩石渗透率具有明显的方向性,因而渗透率是矢量。分析了在理解和应用渗透率矢量特性时容易混淆的一些认识,并指出,渗透率是渗流通道的渗透率,不能脱离渗流通道而独立存在,它具有明确的物理意义,不能像数学中的自由矢量那样随意合成与分解,不能把两个不同方向上的渗透率矢量合成在一起作为该合矢量所对应方向上的渗透率;也不能把渗透率矢量在某个方向上的投影作为该投影方向上的渗透率值。此外,还建立了一种各向异性渗透率的定量计算模型,根据该模型,可以计算出平面内任意方向上的岩石渗透率。该模型可用于计算油藏不同方向上的传导率,以及各向异性油藏中不同方位上的井距设计。
The study and practice show that permeability as a kind of vector is closely related to orientations for its scale. The origin of permeability vector is presented. Some confusable understandings that occur for application of the vector feature are analyzed. It is pointed out that the permeability means one within flow path, hence it couldn't exist independently without the flow path. Also, it has distinct physical meaning, the artificial addition and decomposition of it like free vectors in mathematics can not made. Study indicates that two different directions of permeability vectors could not serve as the permeability of corresponding direction for its resulting vector, nor the projection of a permeability vector on a direction as the permeability value on the projected direction. Also, a quantitative calculation model is deduced for anisotropic permeability, by which the horizontal permeability in any direction could be estimated. The model can be used for the conductivity estimation in different directions in reservoir simulation and for the well space design in different orientations in anisotropic reservoirs.
出处
《新疆石油地质》
CAS
CSCD
2004年第6期683-685,共3页
Xinjiang Petroleum Geology
基金
中国石油化工股份有限公司科技攻关项目"非均质砂岩油藏矢量开发技术研究"(编号:P03054)资助
