1. What is the Gas-Oil Ratio (GOR)?

The Gas-Oil Ratio (GOR) is a measure of the volume of gas produced per volume of oil produced. It's an important parameter in petroleum engineering and reservoir analysis, indicating the amount of dissolved gas in crude oil.

2. How Does the Calculator Work?

The calculator uses the GOR equation:

Where:

• \( Gas\ Volume \) — Volume of gas in standard cubic feet (scf)
• \( Oil\ Volume \) — Volume of oil in barrels (bbl)

Explanation: The equation simply divides the volume of gas by the volume of oil to determine how much gas is produced per barrel of oil.

3. Importance of GOR Calculation

Details: GOR is crucial for reservoir characterization, production facility design, and economic evaluations. It helps determine whether a reservoir is primarily oil or gas, and can indicate reservoir pressure changes.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is a typical GOR value?
A: Typical GOR values range from 0 (no gas) to over 100,000 scf/bbl for dry gas reservoirs. Oil reservoirs typically have GORs between 200-10,000 scf/bbl.

Q2: What's the difference between GOR and RGO?
A: GOR (Gas-Oil Ratio) measures gas per oil volume, while RGO (Oil-Gas Ratio) is the inverse (oil per gas volume). They're simply reciprocals of each other.

Q3: How does GOR change during production?
A: GOR typically increases as reservoir pressure drops below the bubble point, causing more gas to come out of solution.

Q4: What units are used for GOR?
A: The standard units are standard cubic feet per barrel (scf/bbl), though metric units (m³/m³) are also used.

Q5: What is solution GOR vs producing GOR?
A: Solution GOR (Rs) is the gas dissolved in oil at reservoir conditions, while producing GOR is what's measured at surface conditions.