Pressure Transient Well Test

Definition - What does Pressure Transient Well Test mean?

Pressure Transient Well Test is an assessment test carried out to determine the performance of a wellbore by measuring the pressure and flow rate in the wellbore. The test describes a detailed process that includes validation, data acquisition, and interpretations of various reservoirs. These tests are performed at various stages of the well, i.e., at the time of drilling, completion of process and production phase.

Petropedia explains Pressure Transient Well Test

Pressure Transient Well Test is conducted under multi-phase flow conditions and layered reservoirs. When carrying out the test a small amount of fluid is allowed to flow in the well being tested so as to get accurate results. The test is considered as a primary source of reservoir data and it is essential because it calculates the pressure of the liquid and provides information on the shape and size of the formation. The advantages of the Pressure Transient Well Test include:

  • It helps in learning the well and reservoir properties.
  • It helps in optimizing the test designs.
  • It helps in minimizing the cost of field operations.
  • It helps in determining the range of uncertainties.
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