Pressure Transient Well Tests

Definition - What does Pressure Transient Well Tests mean?

Pressure Transient Well Tests are methods used for studying and understanding the reservoir performance. The performance is assessed by measuring the pressure and the flow rate under the range of fluid flow conditions. Once data is gathered, it is applied into a mathematical model for the analysis and interpretation. During the test, very limited amount of fluid is flowed through the well.

Petropedia explains Pressure Transient Well Tests

When a limited amount of fluid flows through a well in Pressure Transient Well Testing, the pressure in the formation is monitored over a period of time and then the formation is shut in. The pressure in the formation is monitored till the fluids in the formation equilibrate. Such analysis of the pressure changes provide the shape and size information of the reservoir and its ability to produce enough amount of hydrocarbons for the economic viability of a well.

Further this testing also helps in gathering the following information:

  • Understanding permeability of the hydrocarbons
  • Estimation of skin factor
  • Average pressure in the drainage area of testing
  • Estimation of flow barriers (if any) such as faults or cracks in between.

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