Retrieving "Seal" from the archives

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1. Shale

   Linked via "seal"

   Geologic Significance and Economic Importance
   Shale formations are critical in both subsurface hydrogeology and energy resource extraction. Their low permeability often acts as an effective aquitard or seal, trapping reservoir fluids.
   Hydrocarbon Systems

2. Shale

   Linked via "seal"

   Hydrocarbon Systems
   Shale plays a dual role in petroleum geology: as a source rock and as a seal. When subjected to sufficient heat and pressure (the "oil window" [oil window]), organic matter within the shale kerogen matures into oil and natural gas.
   | Shale Type (Kerogen Basis) | Dominant Organic Content | Typical Maturation Temperature ($\text{T}_{\text{max}}$) | Key Formation Pressure Anomaly |