多级变流度技术在子长油田堵水驱油的研究与应用

MULTISTAGE VARIABILITY TECHNOLOGY USED FOR WATER PLUGGING AND OIL DISPLACEMENT IN ZICHANG OILFIELD

通过室内研究,将渗流空间划分为三类,并确定了三类渗流空间的流度调整范围。选择1口注水井进行现场试验,试验证明该技术可以有效的控制高渗透层的流度,调节低渗透层的流度,使不同渗流空间的流度趋于1,目标井组有效期内365天累计增油265.6t,综合含水下降了13.9%,堵水驱油效果明显。

Based on researches conducted in laboratory,three types of seepage space have been recognized and determined in their mobility adjustment range.One water injection well was selected for test at field,showing that the technique could effectively control the mobility of high permeability layer,adjust the mobility of the low permeability layer and make the mobility of different seepage spaces tending to 1,the group of target wells would increased oil output to 265.6 tons in 365 days,and as a consequence,the water content was cut down to 13.9%,indicating obvious effect of water shutoff and oil displacement.