Which kerogen type is typically oil-prone?

Which kerogen type is typically oil-prone?

• A. Type II
• B. Type III
• C. Type I
• D. Type IV

Answer: (C)

Oil-prone kerogen comes from hydrogen-rich organic matter that breaks down into liquid hydrocarbons when heated. Type I kerogen fits this best because it comes from algal or lacustrine sources and has high hydrogen content, low sulfur, and a structure rich in long-chain hydrocarbons. This combination makes it especially likely to generate liquids (oil) at relatively low maturation and with high oil yield. Type II kerogen is also capable of producing oil, but it typically yields a mix of oil and gas and generally has a lower oil yield than Type I. Type III kerogen, derived from terrestrial plants, is more gas-prone and yields little oil, while Type IV is inert and won’t generate hydrocarbons.

Oil-prone kerogen comes from hydrogen-rich organic matter that breaks down into liquid hydrocarbons when heated. Type I kerogen fits this best because it comes from algal or lacustrine sources and has high hydrogen content, low sulfur, and a structure rich in long-chain hydrocarbons. This combination makes it especially likely to generate liquids (oil) at relatively low maturation and with high oil yield.

Type II kerogen is also capable of producing oil, but it typically yields a mix of oil and gas and generally has a lower oil yield than Type I. Type III kerogen, derived from terrestrial plants, is more gas-prone and yields little oil, while Type IV is inert and won’t generate hydrocarbons.