对于封固段较长的固井作业，采用梯度多凝水泥浆体系，在一定程度上可以代替双级固井，具有很强的优越性。
Gradient multi-setting cement slurry system can take the place of double stage cementing in long isolation sections in certain degree, and it displaces many advantages.
现场应用表明，双级梯度多凝水泥浆固井技术能减少施工压力，防止压漏地层；
The slurry has been used in field and the results showed that operating pressure was reduced and formation breakdown was prevented;
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