Static Pressure

Definition - What does Static Pressure mean?

Static Pressure is the pressure which is measured after closing a well for a certain time period. As a usual practice of an operator & driller, the Static Pressure is often measured after closing the well for 24 to 72-hour period. As the production from the oil well begins, the pressure starts to rise and after some time it becomes equal to the reservoir pressure. During the discovery of the formation the pressure inside the well is known as initial pressure.

Petropedia explains Static Pressure

The word static in the Static Pressure refers to constant or not moving i.e., the Static Pressure in the well at every point remains constant with the steady fluid movement in it. Static Pressure is best explained by the basic equation for pipes known as Bernoulli’s equation:

Where P = Static Pressure

= dynamic pressure denoted by q

= fluid density

v = velocity of the fluid flowing in a pipeline

g = acceleration due to gravity

h = head of the fluid

In a steady flowing fluid no matter the speed, every point has three types of pressure:

  • Static Pressure (P),
  • Dynamic Pressure (q) and
  • Total Pressure .

Thus, in fluid mechanics, the Bernoulli’s equation can be simply written as Total Pressure = Static Pressure + Dynamic Pressure

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