新型护壁堵漏材料配方优选及叠加效应研究

松散破碎、易漏失的复杂地层是地质钻探的难题之一,为此开展了一种新型护壁堵漏材料实验研究。通过正交实验研究水泥配合比、水灰比以及外加剂掺量这三种因素对于复合体系浆液灌注性能的影响程度,从而优选出护壁堵漏的配方。在此基础上,运用XRD、SEM等微观方法对不同龄期复合水泥的水化产物进行分析,揭示复合水泥体系的水化叠加效应。实验结果表明:复配水泥的水化叠加效应在松散破碎、易漏失的复杂地层的护壁堵漏方面提供了新的思路。

Study on a new formula of wall plugging material optimization and superposition effect

In order to solve loose and broken, leakage loss of complex stratum is one of the most difficult problems in geological drilling, we carried out a new wall plugging material for experimental studies. By orthogonal experimental study mix cement, water-cement ratio and additives content of these three factors impact the performance of the composite system of slurry perfusion, which is preferably a Wall plugging new formula. The hydration products of composite cement in different age were analyzed by using XRD and SEM micro methods, revealing the superimposed effect of composite cement hydration system. The experimental results show that the compound cement hydration superposition effect in loose broken, leakage loss of complex formation plugging in the wall provides new ideas.