Temperature, Time and Pressure

rishi777 · rishi777 on Fri Sep 18, 2009 2:11 am

It is commonly assumed that petroleum formation is a function of the increasing burial of the source rock. However, other factors than the burial history; such as the type of originating kerogen, and the geothermal gradient are also important.

"Kerogen" refers to the organic component of source rock. It began as living organisms, became sediments (comparable to top soil), and then, as they were overlaid, began the change from sediment to sedimentary rock (a process known as "diagenesis"). The original organic material, and the microbial activity it contained, influenced the extent and nature of the hydrocarbons which are eventually produced. The first hydrocarbon generated is methane (sometimes called "biogenic gas"). http://astrologeee.blogspot.com

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