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Kinetic parameters that describe chemical reaction rates include the activation energy and frequency factor. Most petroleum system modeling assumes that oil and gas generation can be described by a series of parallel first-order kinetics, where the rate of each reaction depends on the concentration of only one reactant. Kinectic models in which the generation of different subcomponents of the [[kerogen]] are individually stimulated (i.e., each subcomponent has a different set of frequency factors and distribution of activation energies). These subcomponents can be defined by molecular weight range (e.g., C<sub>7</sub>-C<sub>15</sub>, C<sub>16</sub>-C<sub>25</sub>, C<sub>26</sub>-C<sub>35</sub>, C<sub>36</sub>-C<sub>45</sub>, C<sub>46</sub>-C<sub>55</sub>, C<sub>56</sub>-C<sub>80</sub>), compound type, or a combination thereof.<ref name=Petersetal_2012>Peters, Kenneth E., David J. Curry, and Marek Kacewicz, 2012, [http://archives.datapages.com/data/specpubs/hedberg4/INTRODUCTION/INTRODUCTION.HTM An overview of basin and petroleum system modeling: Definitions and concepts], ''in'' Peters, Kenneth E., David J. Curry, and Marek Kacewicz, eds., Basin modeling: New horizons in research and applications: [http://store.aapg.org/detail.aspx?id=1106 AAPG Hedberg Series no. 4], p. 1-16.</ref>
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==References==
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