1. What is Wellhead Pressure?

Wellhead Pressure (WHP) is the pressure measured at the top of an oil or gas well. It represents the pressure available 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 (psi)

Explanation: The equation 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, and safety in oil and gas operations. It helps determine flow rates and monitor well performance.

4. Using the Calculator

Tips: Enter bottom hole pressure and hydrostatic pressure in psi. Both values must be valid (non-negative numbers).

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between WHP and BHP?
A: Wellhead pressure is always less than bottom hole pressure due to the hydrostatic pressure of the fluid column in the well.

Q2: How is hydrostatic pressure calculated?
A: Hydrostatic pressure = fluid density × gravitational acceleration × true vertical depth.

Q3: Why is wellhead pressure important in production?
A: WHP determines the available pressure to flow hydrocarbons to surface facilities and helps optimize production rates.

Q4: What factors can affect wellhead pressure?
A: Fluid properties, well depth, flow rate, choke settings, and reservoir pressure can all affect wellhead pressure.

Q5: How often should wellhead pressure be monitored?
A: Wellhead pressure should be continuously monitored in producing wells to ensure safe operation and detect any abnormalities.