In order to accelerate the process of exploration and development in Yi 178 Oilfield,improving success rate of drilling well,and slove these down-hole troublesome condition of wellbore stability,hole cleaning,lubrication and anti-caving,and reservoir protection,polyamine drilling fluid with high inhibity, lubrication and anti-caving ability was optimized to aim at formation character and coustruction difficulty. The experiment showed that the drilling fluid had good inhibition property,formation sealing and lubrication property,high anti-salt contamination,anti-calcium contamination and reservoir protection ability. The drilling fluid was applied in Yi 178-X1VF well,and the following down-hole troublesome condition of wellbore stability of long open hole in second interval,caving about clay rock in Shahejie Group,tight hole sticking and difficult to control rheology behavior in gypsum bed was solved. At last,the average ROP was 8. 98 m/h,and the goal of drilling well with high quality and efficiency was achieved.
Advances in Fine Petrochemicals
lubricating to anti-sticking