Associated Crude Oil from Shale or Shale Oil or Shale Gas:
oil or gas that is trapped in a type of clay rock with very low permeability called Shale or Luitita.
Oil or tight gas deposits:
crude oil or gas coming from any deposit or rocks with low porosity and permeability.
Heavy Crude:
Liquid petroleum with high viscosity
Bituminous Sands:
sands impregnated with bitumen, which is a hydrocarbon of very high density and viscosity.
Methane gas associated with coal seams: natural gas extracted from coal layers. Due to its high organic matter content, coal retains a large amount of adsorbed gas.
Colombian Association of Oil and Gas