What gas is dissolved in oil under natural conditions in an oil reservoir?

What gas is dissolved in oil under natural conditions in an oil reservoir?

• A. Associated Gas
• B. Nonassociated Gas
• C. Gas Condensate
• D. Wet Gas

Answer: (A)

In oil reservoirs, some gas is dissolved in the crude oil under formation conditions; this is known as solution gas, and it is generally referred to as associated gas because it is physically tied to the oil in the reservoir and produced with it. This dissolved gas becomes free gas if pressure drops enough for it to come out of solution, which is a key concept in reservoir performance and the solution gas-oil ratio. Nonassociated gas, by contrast, exists as a separate gas phase in a gas reservoir and is not dissolved in oil. Gas condensate describes liquids that condense from gas, not gas dissolved in oil, and wet gas refers to gas that contains heavier hydrocarbons that may condense at surface conditions but again isn’t defined by being dissolved in oil. So the best fit for gas dissolved in oil under natural reservoir conditions is associated gas.

In oil reservoirs, some gas is dissolved in the crude oil under formation conditions; this is known as solution gas, and it is generally referred to as associated gas because it is physically tied to the oil in the reservoir and produced with it. This dissolved gas becomes free gas if pressure drops enough for it to come out of solution, which is a key concept in reservoir performance and the solution gas-oil ratio. Nonassociated gas, by contrast, exists as a separate gas phase in a gas reservoir and is not dissolved in oil. Gas condensate describes liquids that condense from gas, not gas dissolved in oil, and wet gas refers to gas that contains heavier hydrocarbons that may condense at surface conditions but again isn’t defined by being dissolved in oil. So the best fit for gas dissolved in oil under natural reservoir conditions is associated gas.