摘要
油井堵水后,近井地带的地层渗透率明显降低,堵水前后压力特征明显不同,可通过分析其压力变化来评价堵水效果。应用渗流力学基本理论,建立了油井堵水后的压力预测模型,通过Laplace变换及反演,得到堵水后地层压力解析解,并对堵水后地层压力敏感性进行了分析。结果表明:初始渗透率越低、封堵半径越大、堵水后产量越高、生产时间越长,地层压力越低。
When oil well is plugged,the permeability near well bore zones decreases significantly.Pressure characteristics before and after plugging are different,and plugging effects can be analyzed by means of pressure behaviors.Herein,the basic theory of fluid mechanics is applied to establish the pressure prediction model after water plugging.This model is solved by means of Laplace transformation and inversion so as to analyze pressure before and after water plugging.Calculation results indicate that the lower the initial permeability,the larger the plugging radius,and lower formation pressure after plugging accordingly with better plugging performance that is illustrated by higher production,long producing period and lower formation pressure.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第4期94-96,共3页
Petroleum Geology and Recovery Efficiency
基金
国家"863"项目"海上油田活性聚合物乳液驱油体系研究与应用技术"(2006AA09Z322)
关键词
堵水
数学模型
渗流力学
地层压力
渗透率
封堵半径
water plugging
mathematical model
fluid mechanics
formation pressure
permeability
plugging radius
