The wellkilling was done for workover operations. The formulation of a blocking liquid based on a temporary starch-bischofite gel was specially developed.
The blocking pill of fluid was pumped into the annulus and pushed to the bottom with water due to the limited patency of the tubing column. The well will be transferred to the biopolymer flushing system Biocar for further workover operation.
The preparation of the blocking liquid was carried out directly on the well with the use of a mobile mixing unit, which was transported from the production service base.
Fluid loss was not observed during well-kill operation.
The well was transferred to the clay-less biopolymer mud "Biocar" for further workover after installing the rig.
PARAMETERS OF THE FLUSHING SYSTEM "BIOCAR":
- Density – 1120 kg/m3;
- Funnel Viscosity – 55 sec;
- Gel – 67/81 dPa;
- Filtration – 3,8 ml/30 min;
- PV – 15 cP;
- YP – 158 dPa;
- рН – 9,31.
