Skip to main content

Static fluid

In this section we describe the internal gradient "Static fluid" available in Oliasoft WellDesign™.​

Static fluid is an internal profile, where the unknown is the external pressure profile of the tubing. The internal pressure profile is given by the hydrostatic pressure of a single static fluid column.


NOTE!
In this documentation we denote any tubular as casing or tubing. All calculations however encompass any tubular, such as tubings, casings, liners, tie-backs etc.


Summary​

Static fluid is an internal profile, where the unknown is the external pressure profile of the tubing. The pressure profile is given by the hydrostatic pressure of a single fluid column from RKB to the casing shoe. //: # (end - summary)


Illustrating Pressure Profile Graph​


Printable Version​

Oliasoft Technical Documentation - Static Fluid



Inputs​

The following inputs define the Static Fluid load case:

  1. The true vertical depth (TVD) along the wellbore as a function of measured depth. Alternatively, the wellbore described by a set of survey stations, with complete information about measured depth, inclination, and azimuth.

  2. The true vertical depth (TVD) of: a. The hanger of the tubing TVDhanger\text{TVD}_{\text{hanger}} b. The shoe of the tubing TVDshoe\text{TVD}_{\text{shoe}}

  3. The mud weight / density ρm\rho_m //: # (end - inputs)


Calculation​


The internal pressure profile, parametrized by TVD, of the tubing is then given by:

pe=ρm g TVDp_e = \rho_m \,g\,\text{TVD}


where gg is the gravitational constant.