Seal

{
  "id": "MLC-T-OAG-003287",
  "term": "Seal",
  "field": "Oil and gas",
  "definitions": [
    "An impermeable rock layer that prevents the upward or lateral migration of hydrocarbons from a reservoir rock, trapping them to form an accumulation. Common seal rocks include shales, evaporites, and dense limestones. The effectiveness of a seal is determined by its thickness, lateral continuity, and capillary entry pressure.",
    "Impermeable rock formations that prevent the upward or lateral migration of hydrocarbons from a reservoir. These formations, typically shales, evaporites, or tight carbonates, form a barrier that traps oil and gas. The effectiveness of a seal is determined by its thickness, lateral extent, and capillary entry pressure."
  ],
  "subject": [
    "Geology",
    "Reservoir Characterization"
  ],
  "url": "https://mlchart.com/terminology/oil-and-gas/seal/"
}