Mission and tasks

Two disciplines of biostratigraphy are used in oil laboratory: the micropaleontology and the palynology.  


The micropaleontology is the science that studies the fossil rests of foraminifers (unicellular protozoon), ostracods (bivalve shellfish) and other microfossils such as the radiolarians and diatoms. The foraminifers have a huge importance as markers.

S7 4

Planctonic foraminifers

Sample preparation techniques

The micropaleontology laboratory treats the sedimentary rocks to extract from it the foraminifers and other microfossils, having resort to mechanic and chemical methods to decompose the rocky matrix

Micropaleontology application: 

  • Determination of the formations age
  • Reconstitution of paleo environments
  • Identification of condensate sections associated to the maximum of transgression surface (MFS)
  • Detection of sedimentary gaps and erosion phases
  • Regional correlations and paleo geographical reconstitutions

Palynology :

The palynology is the study of organic partition’s microfossil (palynomorphs). It concerns at the same time marine groups (dinoflagellate cysts, Acritarches, chitinozoans) and continental groups (Pollens, Spores).

S7 13

Palynology application

  • Systematic study of palynomorphes
  • Age determination of different layers
  • Making correlations within the same basin or between different basins
  • Characterisation of sediment deposit places
  • Determining the paleoecology, paleogeography
  • Characterisation of the organic maturity of sediments.