Fluid Inclusion Stratigraphy

Fluid Inclusion Stratigraphy (FIS) is a patented technique involving the rapid and complete analysis of trapped organic and inorganic volatiles in fluid inclusions from cuttings, core, or outcrop samples using quadrupole mass analyzers attached to an automated high-vacuum sample introduction system.


  • • Surface contamination removed
  • • Crushed in vacuum; analyzed via mass spectrometry
  • • C1-C13 petroleum species
  • • BTEX compounds and organic acids
  • • Sulfur bearing compounds including H2S, SO2, COS, and CS2
  • • Depth plots of species and relevant gas ratios
  • • Individual mass spectrum for each sample
  • • Thin section follow up included as part of service


  • • Migration, charge/paleo-charge, fluid contacts
  • • Petroleum type; quality; multiple charges
  • • Inferring nearby undrilled accumulations
  • • Microseepage, deeper potential
  • • Seals, compartmentalization
  • • Source rock richness and maturity
  • • Fractures/sweet spots in horizontal wells
  • • Indentifying samples for GCMS and CSIA

When to Use
What to Send

  • FIS is one of the most broadly applicable geochemical techniques available. Virtually any question that involves the present or past distribution of petroleum, its chemical characteristics, and relationship to the rock/pore system is appropriately asked of FIS.
  • • 2-5 g washed, 20 g unwashed sample (min. 1 g, immaculate)
  • • Samples of any age, type or quality
  • • Spacing: 3-10 m cuttings, 0.5-1 m core