阳离子聚合物正电胶泥浆研究与应用

CATIONIC POLYMER-MMH DRILLING FLUIDS: LABORATORY STUDIES AND FIELD RESULTS

根据正电胶MMH对储层损害小，MMH-粘土结构具有强触变性的特点，把正电胶MMH引入阳离子聚合物泥浆，组成了阳离子聚合物正电胶泥浆，成功地解决了塔里木盆地塔中地区井壁坍塌问题，也取得了保护油气层的效果。

With low damage of MMH to reservoir formations and high thixotropy of aquans MMH-clay colloid taken into consideration, MMH is intnduced tO a cationic polymer mud system composed of cationic polymeric encapsulator/flocculant for clay paricles and main cationic additives and a cationic polymer-MMH mud system is obtained. Some recepts of this system formulated are shown to have properties of both anticaving drilling fluid and low-damageable to reservoir formations completion fluid. The uSage of this mud system for drilling three wells in central district of Tarim basin with severe caving problems is successful.