1. What is Wellhead Pressure?

Wellhead Pressure (WHP) is the pressure measured at the wellhead, which is the surface termination of an oil or gas well. It represents the pressure of the reservoir fluids at the surface after accounting for the hydrostatic pressure of the fluid column in the wellbore.

2. How Does the Calculator Work?

The calculator uses the Wellhead Pressure formula:

Where:

• \( WHP \) — Wellhead Pressure (psi)
• \( BHP \) — Bottom Hole Pressure (psi)
• \( Hydrostatic \) — Hydrostatic Pressure of the fluid column (psi)

Explanation: The formula calculates the pressure at the wellhead by subtracting the hydrostatic pressure of the fluid column from the bottom hole pressure.

3. Importance of Wellhead Pressure Calculation

Details: Accurate wellhead pressure calculation is crucial for well control, production optimization, equipment sizing, and ensuring safe operations in oil and gas wells.

4. Using the Calculator

Tips: Enter both Bottom Hole Pressure and Hydrostatic Pressure in psi. All values must be valid (non-negative numbers).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BHP and WHP?
A: BHP (Bottom Hole Pressure) is the pressure at the bottom of the well, while WHP (Wellhead Pressure) is the pressure at the surface. The difference is due to the hydrostatic pressure of the fluid column.

Q2: Why is wellhead pressure important?
A: Wellhead pressure is critical for monitoring well performance, designing surface equipment, and ensuring safe operating conditions.

Q3: How is hydrostatic pressure calculated?
A: Hydrostatic pressure is typically calculated as: Fluid density × Gravitational acceleration × True vertical depth.

Q4: What factors can affect wellhead pressure?
A: Factors include reservoir pressure, fluid properties, well depth, production rate, and wellbore conditions.

Q5: When should wellhead pressure be monitored?
A: Wellhead pressure should be continuously monitored during production, well testing, and well intervention operations.