GEOSYNTHESIS ENGINEERING

Development and service of drilling fluid

  The geological section of the well is represented by colloidal plastic clays. Therefore, drilling will be carried out with the utilization of the updated system "Lignocross", which due to the physico-chemical interaction of lignosulfonate and polysaccharide reagents has increased resistance to contamination by clay. This interaction ensures the long-term presence of clay cuttings in the inactive state, which allows maintaining low rheological parameters and effectively cleaning drilling mud from drilled rock.
  The "Lignocross" system retains all the advantages which appropriate to traditional clay-free drilling fluids, including a powerful inhibiting ability, and high quality of opening productive layers.

INFORMATION ABOUT THE WELL

CASING POLICY:
Surface Casing Ø324 mm – 150 m;
Intermediate Casing Ø244,5 mm – 1170 m;
Production Casing Ø168 mm – 1300 m;

DRILLING FLUID TYPE: 
Surface Casing Ø324 mm – fresh-clay drilling fluid;
Intermediate Casing Ø244,5 mm – biopolymer-lignosulfonate drilling mud “Lignocross”;
Production Casing  Ø168 mm – biopolymer-lignosulfonate drilling mud “Lignocross”.

Density of drilling mud in interval 150-1170 m - 1200 kg/m3;
Density of drilling mud in interval 1170-1300 m - 1100 kg/m3.