The Application Of Fine Pressure-controlled Drilling Technology In The Construction Of Longnvsi Temple

By controlling the density of drilling fluid,equivalent circulating density and wellhead back pressure,The Refined Managed Pressure Drilling makes the bottom hole pressure maintain a relatively constant.It can solve the problem of the "narrow pressure window"drilling,so does it reduce an even more levels of casing and the drilling cost.It is simple and fast by adjusting the wellhead back pressure to change the bottom hole pressure.In the Refined Managed Pressure Drilling,drilling fluid density may be lower than the pore pressure,but it does not mean underbalanced,because the bottom hole pressure is still higher than that of formation pore pressure.For safe drilling in carbonate reservoir through the multiple cracks or developmental empty reservoir,usually in such reservoirs prone to high pressure,high hydrogen sulfide,high temperature reservoir in carbonate reservoir before drilling appeared in the "diarrhea" and other dangerous situations.This paper introduces the application development of The Refined Managed Pressure Drilling in the Longnv Temple Structure,drilling pore fractured carbonate reservoir,in order to raise the level of the safe drilling.Detailed introduction of fine managed pressure drilling in Well 109 of Moxi,process and equipment.Drilling a well pressure control report and analysis,elaborate stage pressure control technology of the actual level and development direction,for the next step of domestic equipment to control pressure helpful.