Application of 120 ℃ environment-friendly drilling fluid in Jidong Oilfield

In order to solve the environmental problem of drilling waste from the source, the environmentally friendly drilling fluid treatment agent was selected, the performances of lubrication, inhibition and reservoir protection of fluid were evaluated, then 120 ℃ environment friendly drilling fluid was formed and field test was taken. The application results showed that the drilling fluid has good lubricity, strong inhibition performance, smooth directional construction, smooth drilling and tripping, which can meet the construction need of the middle and shallow strata in Jidong Oilfield, the system has low filtration volume, and the oil layer is well protected as the permeability recovery value is above 90%. The fluorescence is lower than 4 and the resistivity is adjustable. It has no impact on site logging, the EIA indicators are all up to standard, the chroma of drilling fluid waste obviously reduced in short term, the degradation speed is fast, and it is friendly to environment.