低渗透油藏优势渗流通道模型的建立及应用  

Establishment and Application of Dominant Seepage Path Model of Low-permeability Oil Reservoirs

作　　者：姜瑞忠[1] 于成超[1] 孔垂显[2] 阳旭[2] 孙召勃 

机构地区：[1]中国石油大学,山东青岛266555 [2]中油新疆油田分公司,新疆克拉玛依834000

出　　处：《特种油气藏》2014年第5期85-88,155,共4页Special Oil & Gas Reservoirs

基　　金：国家重大专项"大型油气田及煤层气开发科技重大专项"之"特低渗油藏有效开发技术"(2011ZX05013-006);国家重大专项"薄互层低渗透油藏先导试验区块开发技术政策研究"(2011ZX05051005-002)

摘　　要：针对裂缝型低渗透油藏水窜严重的问题,通过将渗透率相对较低的油层和优势渗流通道划分为2个不同的渗流区域,引入水窜指数和优势通道相对导流系数的概念,运用油藏工程方法,定量分析了优势渗流通道对低渗透油藏开发动态的影响。研究表明:优势渗流通道是影响油藏低含水期采收率的主要因素,水窜指数主要影响见水快慢,优势通道相对导流系数主要影响见水时含水率的大小。同时可根据实际生产数据,计算优势渗流通道的渗透率、渗流面积及渗流体积等参数,研究结果对油藏实施针对性的开发调整措施具有指导意义。Serious water breakthrough exists in fractures of low permeability oil reservoirs. Accordingly,oil layers with lower permeability and dominant seepage path are divided into two different seepage regions,and the concepts of water breakthrough index and relative conductivity factor of dominant seepage path are adopted. Then,the reservoir engineering method is used to quantitatively analyze the impact of dominant seepage path on the development performance of low permeability oil reservoirs. This study indicates that: 1dominant seepage path is the major factor that influences recovery ratio of oil reservoirs during low water content period; 2water breakthrough index mainly affects the speed of water breakthrough; 3relative conductivity factor of dominant seepage path mainly affects water contents when there is water breakthrough. Moreover,based on actual production data,some parameters( such as permeability,seepage area and seepage volume) can be calculated. These study results are significant for deploying specific development measures to oil reservoirs.

关 键 词：低渗透油藏 优势渗流通道 渗流模型 

分 类 号：TE348[石油与天然气工程—油气田开发工程]