保护油层的低粘土相钻井完井液

Low Clay Content Drilling Fluid for Oil Reservoir Protection

通过室内膨胀试验、酸化试验和渗透率恢复试验优选处理剂,研制出了对油层损害小的低粘土相钻井完井液配方。现场试验表明,该完井液对泥岩地层抑制性强,稳定井壁效果好,井径扩大率平均只有4.5％,对油层基本无损害。钻井液性能稳定,维护方便,使用周期长,携砂及悬浮能力强。

Based on shale swelling test , acidizing test and permeability recovering test , several low clay content mud are given . Lab tests indicate these mud possesses good property .