Petroleum & Drilling

Intermediate

Pressure Gradient

Rate at which fluid pressure rises with depth (psi per foot).

Formula

G = 0.433 \times SG

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Variables

GGradient (psi/ft)

SGFluid specific gravity

Example

SG=1.07 brine: G = 0.463 psi/ft

Did You Know?

Fresh water's gradient is 0.433 psi/ft; salty formation brine is a bit higher.

petroleum gradient pressure

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