GEOSYNTHESIS ENGINEERING

Development and service of drilling fluid

Slotted liner was runned in the interval 5680-5770m.

Drilling in lower production visean deposits with abnormally low formation pressure was performed with utilization clayless drilling mud Biocar® with density 1130kg/m3. This flushing system allowed to prevent fluid loss and provided high quality of pay zone opening.


PARAMETERS OF BIOCAR®  DRILLING SYSTEM BEFORE LINER RUNNING:
  • Density – 1,13 g/сm3;
  • Funnel Viscosity – 64 s;
  • Gel – 76/81 dPa;
  • PV – 15 мПа*с,
  • YP – 181 dPa,
  • Filtration loss – 4,5 сm3/30 min;
  • Mud Cake Friction Coefficient – 0,12;
  • Salinity – 11%;
  • Concentraion of KCl - 5-6%;
  • рН – 7,5-8,5