Pore-pressure gradient

{
  "id": "MLC-T-OAG-002867",
  "term": "Pore-pressure gradient",
  "field": "Oil and gas",
  "definition": "The rate of change of pore pressure with depth in a formation. It is calculated by dividing the pore pressure at a specific depth by that depth, and is expressed in units such as pounds per square inch per foot (psi/ft). A normal gradient in sedimentary basins with saline water is approximately 0.465 psi/ft, while values above this indicate overpressure and values below indicate subpressure.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/pore-pressure-gradient/"
}