Kerogen Types and Unconventional Energy Resources

3295 Words7 Pages

Kerogen is an important factor in the generation of oil and gas and which types of unconventional resources it can form. It makes up four different types that are each prone to mature into a certain form of petroleum product. Type I is dominantly oil prone, Type II can generate both oil and gas, and Type II is mainly a gas generating kerogen. Type IV is considered “dead oil” and does not generate any producible hydrocarbon. The three main producible types can be seen in many different unconventional resources in which this report discusses some of the most important examples for each type along with how producible each formation/resource is.

Kerogen is an insoluble macromolecular organic matter that forms from various environments, climates, and biota, giving information on the geologic pasts of these kerogen sources. It is formed by diagenetic processes in the first few hundred meters of burial (Dow, 1976). Kerogen, when mature, forms petroleum and natural gas. To become mature, the kerogen converts by increases in temperature and pressure. Kerogen makes up a large component of the total carbon on Earth with 1016 tons of C compared to 1012 tons of living biomass (Durand, 1980). The original definition of kerogen only included organic-rich rocks of economic importance, but then this definition was extended to include all organic matter rocks capable of generating oil. This was because it was determined that organic matter in sedimentary rocks, even in small amounts, could generate oil (mature) through pyrolysis or burial for long periods of times.

The modern definition as of the late 1950s states that kerogen is the dispersed organic matter of sediments insoluble in the usual organic solvents as opposed to extractable organic ...

... middle of paper ...

...Opportunities and Challenges of Oil Shale Development." GAO (2012): n. pag. Web.

Pacheco, Kenneth. “Petroleum Potential for the Gothic Shale, Paradox Formation in the Ute Mountain Ute Reservation, Colorado and New Mexico.” Colorado School of Mines, 2010. Web.

Smith, John Ward, and Kenneth E. Stanfield. "Oil Shales of the Green River Formation in Wyoming." Wyoming Geological Associated Guidebook (1965): n. pag. Web.

Tissot, B.P, and D.H Welte. Petroleum Formation and Occurance: A New Approach to Oil and Gas Exploration. N.p.: Springer, 1978. Print.

USGS. "3 to 4.3 Billion Barrels of Technically Recoverable Oil Assessed in North Dakota and Montana’s Bakken Formation—25 Times More Than 1995 Estimate—." USGS Newsroom (2008): n. pag. Web.

Vandenbroucke, M., and C. Largeau. "Kerogen Origin, Evolution and Structure." Organic Geochemistry 38.5 (2007): 719-833. Print.

Open Document