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Korla, China

Zhang B.,Tarim Oilfield | Zhang H.,Tarim Oilfield | Zhou Z.,Tarim Oilfield | Liu Y.,Tarim Oilfield | Lv Z.,Tarim Oilfield
Drilling Fluid and Completion Fluid | Year: 2012

Effects of temperature and pressure to rheology of drilling fluid are researched by FAN75, which is based on kinds of low middle and high densities sulfonated drilling fluid in Tarim oilfield. The experimental results show that when temperature and pressure change at the same time, rheology of the drilling fluid changes only with temperature, and the apparent viscosity drops down with temperature rises up below 180°C, rise simultaneously at 180-230°C, also the plastic viscosity drops down with temperature rises up, and the yield point drops down with temperature rises up within 100°C, both rise at 100-230°C. Source


Yin D.,Tarim Oilfield | Ye Y.,Tarim Oilfield | Li L.,Tarim Oilfield | Liang H.,Tarim Oilfield | Wang P.,Tarim Oilfield
Drilling Fluid and Completion Fluid | Year: 2012

The well Keshen7 is a deep exploration well located in foothill structural zone, with the salt bed formation depth of 7, 211 m. In this well, the high density whole oil base drilling fluid system is used to drill through salt bed formation, it is encountered high pressure salt water in depth of 7, 764 m, and the density of kill fluid is 2.55 g/cm3, however, a severe lost circulation occurs while killing well. In this situation, a kind of deposit isolation lost circulation control technology is applied that is cooperated with water-based lost circulation control mud and oil-based drilling fluid. The application shows that single normal LCM used either in water or oil based drilling fluid can not deal with the complex formations in well Keshen7, however, the deposit isolation lost circulation control technology can be used here successfully. Source

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