低渗透油田周期注水与调剖结合参数优化研究

Optimization of Parameters for Cyclic Water Flooding Combined with Profile Control for Low Permeability Oilfield

为改善低渗透油田措施挖潜剩余油的效果,在分析周期注水与深度调剖结合机理的基础上,利用Petrel软件进行精细地质建模,应用CMG软件中STARS模块进行数值模拟计算,优化周期注水与深度调剖结合的参数。结果表明,经过深度调剖后,朝55区块周期注水的间注半周期由3个月缩短为2个月,注水半周期内注水强度由2.0倍常规注水强度增大为2.5倍常规注水强度,周期注水与深度调剖结合较单一周期注水与深度调剖提高采收率0.55个百分点。周期注水与深度调剖结合可有效提高储层动用程度,为低渗透油田措施挖潜剩余油提供了一定的理论依据。

To improve the effect of stimulation in low permeability oilfield,Petrel software is used to build a fine geological model on the basis of analyzing the mechanism of cyclic water flooding combined with deep profile control. Besides,STARS module of CMG software is applied for numerical simulation,so as to optimize the parameters for the process. The study shows that,in Block Chao 55,the half cycle of cycling waterflooding changes from 3 months to 2 months after deep profile control,and the injection intensity changes from 2. 0 times to 2. 5 times; accordingly,the recovery by cyclic waterflooding + deep profile control is 0. 55 percent point higher than either cyclic waterflooding or deep profile control. So,the combination of cyclic waterflooding and deep profile control can enable the reservoir to be produced more effectively,which provides a specific theoretical evidence for developing remaining oil in low permeability oilfields.