一种低分子选择性堵水剂实验研究

Experimental Study on a Low Molecular Weight Selective Water Plugging Agent

利用填砂管模型对开发的小分子选择性堵水剂进行了实验研究。考察了堵水剂对渗透率、油水层的选择性封堵和油水混合层选择性封堵的影响。结果表明,堵水剂对高渗透层封堵效果明显,对低渗透层几乎没有作用;堵水剂对水敏感而对原油或油类不敏感,可选择性封堵高渗透层又不至于堵住油层。对油、水混合层也具有选择性堵水效果,含水量越高,封堵效果越好。

The model of sand filling pipe was used to study the small molecule selective water shutoff agent. The effect of water plugging agent on permeability, selective plugging of oil-water layer and selective plugging of oil-water mixed layer was investigated. The results showed that the plugging agent had obvious plugging effect on the high permeability layer, but almost no effect on the low permeability layer;the plugging agent was sensitive to water but not to crude oil or oil, and could selectively block the high permeability layer without plugging the reservoir. It also had selective water plugging effect on oil-water mixed layer, the higher the water content was, the better the plugging effect was.