Headspace Gas Analysis

  • Cuttings + Bacteriocide
  • Gas Chromatography :
    • Methane (C1) - Penthane (C5)
  • Identification :
    • Hydrocarbon Type (Gaseous vs. Liquids)
    • Thermal Maturity
    • Migrated Hydrocarbon Thermogenic vs. Biogenic
    • Carbon Isotope

Head-Space Gas Analysis

Butane Index (nC4/(i+n)C4) of nearly constant value indicates vertical migration of thermogenic HCs.

Head-Space Gas Chroma Tograms

Interpretation

  • C1 - C4 Total Gas
  • Wetness Gas :
    • 0 - 35 % Immature
    • 35 - 60 % Early Mature
    • 60 - 100 % Mature
  • Ratio iC4/nC4 :
    • > 1 Immature
    • < 1 Mature
  • C5+ : Liquid Hydrocarbon