1. What is Gas Oil Ratio (GOR)?

Gas Oil Ratio (GOR) is a key parameter in petroleum engineering that measures the amount of gas produced per unit of oil. It's expressed as standard cubic feet of gas per barrel of oil (scf/bbl).

2. How Does the Calculator Work?

The calculator uses the GOR formula:

Where:

• \( G \) — Gas volume in standard cubic feet (scf)
• \( O \) — Oil volume in barrels (bbl)

Explanation: The formula calculates how many cubic feet of gas are produced along with each barrel of oil.

3. Importance of GOR Calculation

Details: GOR is crucial for reservoir characterization, production optimization, facility design, and economic evaluation of oil and gas projects. It helps determine the type of reservoir fluid and production mechanisms.

4. Using the Calculator

Tips: Enter gas volume in standard cubic feet (scf) and oil volume in barrels (bbl). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical GOR value?
A: GOR values vary widely depending on the reservoir. Undersaturated oil reservoirs typically have GORs below solution GOR, while gas condensate reservoirs have much higher GORs.

Q2: How does GOR change over time?
A: GOR typically increases as reservoir pressure drops below bubble point pressure, as more gas comes out of solution from the oil.

Q3: What's the difference between GOR and GLR?
A: GOR measures produced gas relative to stock tank oil, while Gas Liquid Ratio (GLR) measures gas relative to total liquids (oil + condensate).

Q4: Why use standard cubic feet?
A: Standard conditions (usually 60°F and 14.7 psia) provide a consistent basis for comparing gas volumes regardless of actual temperature and pressure.

Q5: How is GOR used in reservoir engineering?
A: GOR data helps identify reservoir drive mechanisms, estimate reserves, design surface facilities, and optimize production strategies.