义171-斜15VF井钻井液技术

针对义171-斜15VF井地质构造复杂、钻井液技术难度大的特点,施工中采用强抑制聚合物钻井液体系和强抑制聚磺润滑防塌钻井液体系,利用胺基聚醇的强效抑制作用、胶乳沥青和双膜承压剂的复合封堵作用以及硅氟稳定剂的高温稳定作用,解决了沙河街组易发生的泥页岩水敏性垮塌及应力性垮塌、膏泥岩缩径卡钻及定向井润滑防卡等难题,顺利钻至目的层,达到了优快钻井的目的。

Application of Drilling Fluid Technology at Yi 171-X15VF Well

In view of the features like structural complexity and the significant technical difficulty for drilling fluid application, etc. at Yi 171 -X15VF Well, a high inhibition polymer drilling fluid system and a high inhibition sulphonated polymer lubricated anti - collapse drilling fluid were used in the construction. The difficult problems of mud shale water - sensitive collapse and stress collapse that occurred in Shahejie Group easily, gypsum mudstone hole shrinkage caused pipe - sticking and pipe - sticking prevention at directional well, etc. were solved by making use of the high inhibiting effect of amino poly - alcohol, the composite plugging effect of latex bitumen and double -membrane pressure bearing agent and the stabilization effect of silicon fluoride stabilizer, the target zone was reached successfully, and good and fast drilling was realized.