摘要
针对超低渗透砂岩油藏注采比高的问题,基于无效注水原因分析提出了有效累计注采比的概念。以吉林红岗油田大45区块为例,采用吸水剖面法和物质平衡法分别对有效累计注水量和有效累计注采比进行了计算并比较其结果,并利用油藏数值模拟予以验证。其结果合理地解释了超低渗透油藏有效累计注采比高的原因,同时也说明了以往累计注采比的局限性,该方法可用于同类超低渗透油藏注水开发效果评价。
For the problem about the high injection-production ratio in ultra-low permeability reservoir, the concept of effective accumulative injection-production ratio is created based on the reason of inefifcient water injection. Taking Da 45 Block of Jilin Honggang Oilifeld in Jilin Province, water injection proifle method and material balance method are used to respectively compute the effective accumulative water injection rate and the effective accumulative injection-production ratio and contrast the results, and numerical reservoir simulation is used for veriifcation. The results reasonably demonstrate the reason of the high effective accumulative injection-production ratio in ultra-low permeability reservoir as well as the limitation of pervious accumulative injection-production ratio. Therefore this method can be applied to evaluate the water injection development effect in the similar ultra-low permeability reservoir.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2015年第6期86-89,共4页
Oil Drilling & Production Technology
关键词
超低渗透
有效累计注采比
吸水剖面
物质平衡
红岗油田
ultra-low permeability
effective accumulative injection-production ratio
water injection profile
material balance
Honggang Oilfield