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目的：保护油气层，减小油层损害。方法：针对江汉油田江陵凹陷中央背斜带储层特征，分析其潜在损害因素，在研究常用处理剂的抗盐性和与地层水的配伍性的基础上，研制出了两种钻井液、完井液体系。结果：室内与现场试验都表明，这两种体系对油气层的损害较小，其动、静态损害的渗透率恢复值均在70％以上，表皮系数较小，收到了较好的储层保护效果。结论：所研制的两种钻井液、完井液体系是一种切实可行的油气层保护措施。
Purpose: To protect the reservoir and to reduce damage to the reservoir. Methods: According to the reservoir characteristics of central anticline belt in Jiangling Sag of Jianghan Oilfield, the potential damage factors were analyzed. Based on the study of salt resistance of common treatment agent and the compatibility with formation water, two kinds of drilling fluids were developed. Well fluid system. Results: Both indoor and field tests show that these two systems have less damage to the oil and gas reservoirs, and the recovery rates of dynamic and static damage are above 70% and the skin factor is small, so they have received better reservoir protection effect. Conclusion: The two kinds of drilling fluid and completion fluid system developed are a feasible measure to protect oil and gas reservoirs.