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IMPERVIOUS ROCK [7 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 2011-05-31

English

Subject field(s)
  • Geology
  • Physical Geography (General)
  • Hydrology and Hydrography
  • Petroleum Deposits
DEF

Descriptive of not allowing the passage of fluid.

OBS

A formation may be porous yet impermeable due to the absence of connecting passages between the voids within it.

PHR

impermeable layer; impervious rock.

French

Domaine(s)
  • Géologie
  • Géographie physique (Généralités)
  • Hydrologie et hydrographie
  • Gisements pétrolifères
DEF

Qui ne se laisse pas traverser par un liquide, et spécialement par l'eau.

DEF

Se dit d'une matière qui, par nature, ne se laisse pas pénétrer, imprégner par l'eau.

Spanish

Campo(s) temático(s)
  • Geología
  • Geografía física (Generalidades)
  • Hidrología e hidrografía
  • Yacimientos petrolíferos
DEF

Que posee una textura que no permite el paso del agua de forma perceptible bajo la presión estática del agua subsuperficial.

Save record 2

Record 3 2005-05-24

English

Subject field(s)
  • Geology
  • Petroleum Deposits
DEF

A trap where a bed or reservoir rock gets progressively thinner as it nears an impervious area and eventually disappears.

CONT

Pinch-out [is] a type of stratigraphic trap. The termination by thinning or tapering out ("pinching out") of a reservoir against a nonporous sealing rock creates a favorable geometry to trap hydrocarbons, particularly if the adjacent sealing rock is a source rock such as a shale.

Key term(s)
  • pinchout trap
  • pinchout

French

Domaine(s)
  • Géologie
  • Gisements pétrolifères
OBS

La rotation et le pincement distal des grès ont pu engendrer des pièges stratigraphiques profonds.

Spanish

Save record 3

Record 4 2004-04-21

English

Subject field(s)
  • Geochemistry
  • Metals Mining
DEF

... the vertical ascending motion of metal-bearing solutions.

CONT

In some deposits, ... mineralization results from the upward migration of postmagmatic fluids rich in F and CO2 ...

OBS

Migration continues until the liquid reaches the surface and begins seepage or until it reaches a layer of impervious rock and is trapped.

OBS

As opposed to "downward movement."

French

Domaine(s)
  • Géochimie
  • Mines métalliques
DEF

Déplacement vertical vers le haut, en particulier des solutions métallifères.

CONT

L'accumulation dans les roches-magasins s'est faite à la suite d'une migration ascendante.

CONT

Du plomb et du zinc en teneurs très faibles dans des marnes peuvent se déplacer dans des fractures et se déposer dans des calcaires sus-jacents (migration latérale et per ascensum).

OBS

Les migrations se feront soit du haut vers le bas (per descendum), soit du bas vers le haut (par ascensum), ou bien encore latéralement.

OBS

En contexte, l'expression latine «per ascensum» est écrite en italiques.

Spanish

Save record 4

Record 5 2001-06-06

English

Subject field(s)
  • Petroleum Deposits
  • Geology
DEF

A geological structure that forms a trap for oil and gas by virtue of a porous and permeable rock ending or stopping against an impervious formation.

French

Domaine(s)
  • Gisements pétrolifères
  • Géologie
CONT

Piège par pincement.

Spanish

Save record 5

Record 6 1998-11-16

English

Subject field(s)
  • Dams and Causeways
DEF

A dam composed of loose rock supporting a watertight face or containing a watertight core of impervious earth, concrete, steel sheet pile, or some combination of these materials, or backed by an earth embankment.

French

Domaine(s)
  • Barrages et chaussées
DEF

Barrage en remblai dont plus la moitié du volume total est constitué de matériaux rocheux.

Spanish

Save record 6

Record 7 1977-12-17

English

Subject field(s)
  • Geology
OBS

Impervious or impermeable rocks are those through which water cannot easily soak; they may be of two kinds: porous, like clay, or relatively non-porous, like massive unfissured granite. (...) porosity is not necessarily a sufficient condition to ensure permeability.

French

Domaine(s)
  • Géologie
OBS

Somme toute, l'eau de pluie remplit des sortes de récipients terrestres, formés de roches dites perméables, opposées aux roches imperméables qui ne se laissent pas facilement traverser.

Spanish

Save record 7

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