Preparation And Study Of Drilling Fluid Lubricant In Shale Gas Horizontal Well

In this paper,the high friction and high torque problems in the development of shale gas horizontal wells are studied.The formula,preparation method,material selection and performance characteristics of shale gas horizontal well drilling fluid are studied under the guidance of literature,field application experience and tutor.In the laboratory,an extreme pressure lubricant FR with a S,N and other active elements suitable for shale gas horizontal wells was synthesized.The experimental evaluation of the lubricant shows that the addition of 3% drilling fluid lubricant FR in drilling fluid can effectively improve the lubricity,sealing and significantly reduce the loss of drilling fluid,and the drilling fluid The impact of other performance is relatively.Lubricants in the Algeria 438 B block,the golden dam site and the Xinjiang Oilfield FNHW4016 wells field application results show that the indoor development of the lubricant FR has excellent lubrication performance,sealing performance,can significantly improve the quality of mud cake,reducing the The resistance caused by the unwanted solid phase in the drilling fluid,the resistance of the wellbore trajectory,the resistance due to the increase in the length and structure of the drilling tool,and the resistance at the time of drilling.