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Tubing Leak with Temp Sim

In this section we describe the load case “Tubing leak” available in Oliasoft WellDesign™.​


Tubing leak is a burst load case, where the unknown is the internal pressure profile of the casing / tubing.

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​

Tubing leak with TempSim is a burst load for the production casing. It is assumed that a leak occurs close to the hanger from the tubing and the tubing annulus. The pressure at the hanger is obtained from TempSim. This load case follows a conservative approach, assuming that the tubing annulus is filled with packer fluid. Consequently:

  1. From the hanger to the packer, the pressure profile is defined by the hanger pressure with packer fluid beneath it.
  2. From the packer to the casing shoe, the pressure is obtained from TempSim.

Inputs​


The following inputs define the tubing leak with TempSim 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 and inclination.

  2. The true vertical depth / TVD of:
    a. The hanger of the tubing, TVDhanger
    b. The shoe of the tubing, TVDshoe
    c. The packer depth, TVDpacker
    d. The perforation depth, TVDperforation

  3. The packer fluid density, ρpacker

  4. The temperature is obtained from TempSim