大庆石油地质与开发2018，Vol.37Issue(3)：64-70,7.DOI:10.19597/J.ISSN.1000-3754.201710043
基于采出程度的高含水期低饱和度油层补孔时机优化
OPTIMIZED TIME OF THE PERFORATION ADDING FOR THE LOW-SATURATION OIL LAYER AT THE HIGH-WATERCUT STAGE BASED ON THE RECOVERY DEGREE
摘要
Abstract
The time or opportunity of perforations adding (i.e.the watercut for the perforation added oil well) for the low-saturation oil layer at the high water cut stage is of great significance for improving the multi-reservoir recovery degree.By means of the seepage theory and reservoir engineering methods,the mathematical flow model was established for the perforations adding of the high-watercut low-saturation multi-layer oil reservoir with the barriers;under the conditions of different dimensionless initial oil saturation,the dimensionless water injection rate,the dimensionless permeability and the dimensionless thickness,the influences of the time on the recovery degree were studied with the help of the model.And moreover the optimal adding time was obtained.The research achievements show that with the increase of the adding time,the recovery degrees of 98％ comprehensive watercut and after 3 years of perforations adding increase as well;when the perforation time is more than 85％,with the reduction of the perforation adding,the increments of the degrees stated above also increase.The greater the different dimensionless initial oil saturation,the dimensionless thickness and the dimensionless permeability are,the higher both the recovery degrees will be;the greater the dimensionless velocity of the water injection is,the greater the recovery degree after 3 years will be;the dimensionless speed of the water injection does not affect the recovery degree of 98％ comprehensive watercut.The study concludes show that taking the recovery of 98％ comprehensive watercut as the goal,92％-96％ watercut is regarded as the best for the time of the perforation adding;taking the recovery after 3 years as the goal,the velocity of the water injection should take as higher as possible,the time of the perforation adding should also take 92％-96％ of it as the best.关键词
高含水期/低饱和度层/补孔/补孔时机/采出程度Key words
high-watercut stage/low-saturation layer/formation/zone/perforations adding/perforation adding time/opportunity/recovery degree/factor分类
能源科技引用本文复制引用
崔传智,吴忠维,杜庆龙,朱丽红,单高军..基于采出程度的高含水期低饱和度油层补孔时机优化[J].大庆石油地质与开发,2018,37(3):64-70,7.基金项目
国家重大科技专项“大型油气田及煤层气开发”资助项目(2016XZ05010-002-007). （2016XZ05010-002-007）
