底水油藏CO₂控水实验

Experiment research on water control with CO₂ in bottom water reservoir

刘晓强¹ 曲占庆¹ 杜勇²

中国石油大学（华东）石油工程学院，山东 青岛 266580 中国石化胜利油田分公司桩西采油厂，山东 东营 257237）

College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China Zhuangxi Oil Production Plant, Shengli Oilfield Company, SINOPEC, Dongying 257237, China

文中采用物理模型的方法，分别研究了CO₂驱替水相和油相的效果、CO₂压水锥后油相和水相渗流能力以及CO₂控水稳油效果；分析了底水油藏注入CO₂控水的主要机理，并对控水效果进行了评价。实验结果表明：在相同注入压力下，注入的CO₂气体驱替水相的能力较强，对油相的驱替能力较弱；通过注入CO₂气体压水锥后，地层水被推至地层深处，油相的渗流能力增加，而气体的贾敏效应会导致水相的渗流能力降低；对于非均质性严重的底水油藏，CO₂控水效果具有一定局限性。

 Physical experiments are taken to study the effect of CO₂ displacing water and crude oil, the oil seepage ability and the water seepage ability after water coning by CO₂, and the result of water control with CO₂. The major water control mechanism with CO₂ in bottom water reservoir was analyzed and result of water control was evaluated. Based on the experimental results, the ability of CO₂ displacing water is better than that of displacing oil at the same injection pressure; water is displaced to the deep formation after water coning by CO₂ and the oil seepage ability increases. While the water seepage ability decreases due to Jamin effect of gas; the effect of water control with CO₂ has some limitation because of the serious heterogeneity of bottom water reservoir.

10.6056/dkyqt201603017