PT in Oil & Gas well testing refers to Pressure Transient.

Pressure Transient is a specialized well testing technique used to:

• Analyze the flow characteristics of a reservoir: It involves creating a pressure disturbance (by producing or injecting fluid) in the well and observing the pressure response over time. This data provides insights into the reservoir's properties like permeability, porosity, and fluid saturation.
• Evaluate the performance of the well: It helps to understand the well's productivity (for production wells) or injectivity (for injection wells), allowing engineers to optimize production or injection strategies.
• Determine the reservoir boundaries: PT analysis can help identify the location of faults, water contacts, or other boundaries that may impact reservoir performance.

PT well testing typically involves:

• Pressure drawdown tests: Pressure is reduced by producing fluid from the well, allowing analysis of reservoir properties and well productivity.
• Pressure buildup tests: After production, the well is shut in, and the pressure is allowed to rise. This test helps evaluate reservoir properties and well inflow performance.
• Injection tests: Fluid is injected into the well, allowing analysis of reservoir properties and well injectivity.

PT analysis involves sophisticated software and techniques to interpret the pressure response data and extract meaningful information about the reservoir and well.

In summary, PT (Pressure Transient) well testing is a valuable tool for understanding the behavior of reservoirs and wells in Oil & Gas operations.