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This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Overburden pressure" – news · newspapers · books · scholar · JSTOR (November 2016) (Learn how and when to remove this template message)

Pressure is force magnitude applied over an area. Overburden pressure is a geology term that denotes the pressure caused by the weight of the overlying layers of material at a specific depth under the earth's surface.[1] Overburden pressure is also called lithostatic pressure, or vertical stress.[2]

In a stratigraphic layer that is in hydrostatic equilibrium; the overburden pressure at a depth z, assuming the magnitude of the gravity acceleration is approximately constant, is given by:

[2]

Where:

In deep-earth geophysics/geodynamics, gravitational acceleration varies significantly over depth and should not be assumed to be constant, and should be inside the integral.

Some sections of stratigraphic layers can be sealed or isolated. These changes create areas where there is not static equilibrium. A location in the layer is said to be in under pressure when the local pressure is less than the hydrostatic pressure, and in overpressure when the local pressure is greater than the hydrostatic pressure.[2]

See also

References

  1. ^ Baker, Richard O. (2015). Practical reservoir engineering and characterization. Harvey W Yarranton, Jerry Jensen. Amsterdam. ISBN 978-0-12-801823-1. OCLC 908335687.
  2. ^ a b c Khan, M. Ibrahim (2007). The petroleum engineering handbook : sustainable operations. Rafiqul Islam. Houston, TX: Gulf Pub. ISBN 978-1-60119-627-9. OCLC 261122682.