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CAPROCK [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2021-07-14

English

Subject field(s)
  • Petrography
DEF

The impermeable rock overlying an oil or gas reservoir that tends to prevent migration of the reservoir fluids from the reservoir.

CONT

Oil and gas become trapped in the subsurface where there is a barrier formed by impermeable rocks, such as well-cemented lithologies, mudrock and evaporite beds. These impermeable lithologies are known as cap rocks. The hydrocarbons will find their way around the cap-rock barrier unless there is some form of hydrocarbon trap that prevents further upward migration.

OBS

All cap rocks are impermeable, therefore making the terms "impermeable cap rock" and "impervious cap rock" redundant.

Key term(s)
  • caprock

French

Domaine(s)
  • Pétrographie
DEF

[...] barrière étanche [permettant] de sceller la roche réservoir, évitant par le fait même une dispersion du pétrole et du gaz naturel.

OBS

Comme les roches couverture sont toujours imperméables, le terme «roche couverture imperméable» est redondant.

Key term(s)
  • roche-couverture
  • roche-couverture imperméable

Spanish

Save record 1

Record 2 2011-07-22

English

Subject field(s)
  • Hydrology and Hydrography
  • Geology
DEF

Impermeable bed overlying an aquifer ...

French

Domaine(s)
  • Hydrologie et hydrographie
  • Géologie
DEF

Limite rocheuse supérieure d'un stockage d'eau souterraine.

OBS

Une nappe est captive lorsque son niveau (surface piézométrique) est au-dessus du toit imperméable de la formation géologique qui la contient. Une nappe est libre quand il n'y a pas de toit imperméable.

OBS

L'imperméable est un terrain moins perméable que l'aquifère et qui limite la nappe par son imperméabilité relative. Le mur imperméable est sous la nappe, le toit imperméable au-dessus.

Spanish

Save record 2

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