| 摘要 |
The disclosure relates to a drilling fluid having a viscosity at 40° C. less than or equal to 2.5 mm2/s and having a vapor pressure at 100° C. less than or equal to 10 mBars (1 KPa) obtained from a hydrocarbon fraction having a distillation temperature of 200 to 280° C. and a naphthene hydrocarbon content of less than 40 wt % of the fraction. |
