涡轮钻井技术在梨树断陷区块的应用

Application of Turbodrilling Technology in Lishu Fault Block

梨树断陷区块登娄库组、营城组、沙河子组、火石岭组地层可钻性差、岩性较致密、局部含砾严重,并且沙河子组局部层位岩石硬度达到7级,采用常规钻井技术,存在牙轮钻头效率低、寿命短等问题;各种型号PDC钻头试用后效果不理想。通过采用涡轮钻井技术,平均机械钻速提高了4倍,钻井周期缩短,钻井综合成本大大降低。实践证明,高速涡轮钻具+孕镶金刚石钻井技术是高研磨性、高抗挤强度、高温地层深井钻进提速的有效技术。

Because of the poor drillability,dense lithology and local high gravel content in Denglouku formation,Yingcheng formation,Shahezi formation and Huoshiling formation in Lishu fault block; and rock hardness is up to Grade 7. Low drilling efficiency and short service life of cone bit were the difficulties for traditional drilling technology,and the drilling effect was not ideal for PDC bit trial. But with turbodrilling technology,the average ROP increases 4 times,the drilling cycle is shortened and the comprehensive drilling cost is greatly reduced. The practice shows that turbodrill ＋ impregnated diamond drilling technology is effective with high abrasive,high compressive strength and speeding up for drilling in high temperature deep well.