SIBBURMASH Group of Companies

Core Sampling by SIBBURMASH: Maximum Information from Every Well

Reliable exploration begins with core quality. SibBurMash does more than just take samples — we guarantee core of enhanced information value.

Geological support of isolated (preserved) core

  • treatment of the drilling fluid with a tracer and maintenance of the tracer’s working concentration;
  • gamma logging of the core after recovery to surface, macro-description and photo documentation (in daylight and ultraviolet light);
  • normalization of the gamma-log readings and preliminary interval-by-interval lithological typing of the rocks, followed by selection of intervals for sampling;
  • visual assessment of the drilling-fluid filtrate invasion zone in the selected intervals;
  • decision on the advisability of taking samples to evaluate saturation;
  • preparation (separation of the zone potentially “contaminated” by filtrate) and prompt preservation of the samples.

The innovative design of the sectional isolating core barrels has secured a Russian record twice: in 2012, a 78.93 m column of preserved core was drilled and recovered to surface in a single run with 100% recovery, and in 2025 — 102.5 m with 100% recovery in a single trip.