For kerogen to form, dead phytoplankon, zooplankton, algae, and bacteria must sink to the bottom of an ancient still water environment. Hence, from the theoretical view, Type 1 kerogen oil shales provide the highest yield of oil and are the most promising deposits in terms of conventional oil retorting. fraction of sedimentary organic constituent of sedimentary rocks that is insoluble in the usual organic solvents “Van Krevelen diagram” Kerogens are classified as Type-I, Type-II, Type-III & Type-IV kerogen. .pdf, African University of Science and Technology, African University of Science and Technology • PEE 802. Before this organic matter is destroyed, it is buried by more sediment and lithifies (becomes sedimentary rock), creating organic shale. Type II-D kerogen exhibits an obvious superiority in the adsorption capacity of CH4 and CO2 compared with other type II kerogen. Three main types of kerogen can be recognized (Figures 6): This type is either mainly derived from algal lipids or from organic matter. [3] During petroleum generation, bitumen also forms from kerogen. Kerogen is a waxy, insoluble organic substance that forms when organic shale is buried under several layers of sediment and is heated. to produce natural gas from previously un-exploitable organic-rich shale reservoirs (Speight, 2013). Non clastic clastics chemical biochemical 4. Although type 1 diabetes usually appears during childhood or adolescence, it can develop in adults.Despite active research, type 1 diabetes has no cure. Type II kerogen is intermediate in composition (H/C ≈ 1.2: HI ≈ 600) and derived from mixtures of highly degraded and partly oxidized remnants of higher plants or marine phytoplankton. The present size of the kerogen reservoir of 10–20% of the surface reservoirs is obviously the net result of these processes. If shales have high kerogen content but have not exposed to higher temperatures may form shale oil reservoirs. Oil shale that contains kerogen. In addition, this study not only supports the premise that over-reliance on Rock-Eval/TOC data alone can be misleading for assessment of petroleum generation, but also represents a strategy for kerogen type and generative potential determination for fluvio-deltaic coals and subordinate lithologies. Humic kerogen (TypeIII), which has high initial oxygen contents, gives off mostly CO2 gas and so its oxygen/carbon ratio gradually diminishes. (May 14, 2015). Type I consists mainly of algae and is the most likely type of kerogen to produce oil when exposed to high temperatures. This type is usually related to marine organic matter deposited in a, to carbon ratio and the oil and gas potential are lower than observed for, The primary migration of petroleum hydrocarbons through the fine-, hydrocarbons as well as by the Characteristics of, abundance and physico-chemical characteristics of the generated, hydrocarbons available for primary migration are influenced. The geochemical diagrams show that all the studied samples have good thermal maturation. Type 1 oil shales yield larger amount of volatile or extractable compounds than other types upon pyrolysis. groundwater movement, are described below: A\ Migration of hydrocarbons in molecular solution. Vandenbrouckea. There are different types or classes of kerogen. B\ Migration of hydrocarbons in micellar solution. Ocean or lake material deposited under anoxic conditions often form kerogens of type I or II. During petroleum generation, bitumen also forms from kerogen. “Van Krevelen diagram” can be used to classify Kerogen. Energy, Environment and Climate, 2nd ed. is originally high, and the potential for oil and gas generation is also high. High of concentrations kerogen in a rock such as shale form a Source Rock. The kerogen type is determined by Hydrogen Index (HI) and diagram HI vs. Tmax (temperature, corresponding to S2 peak maximum). Figure 1. Type I source rocks are formed from algal remains deposited under anoxic conditions in deep lakes: they tend to generate waxy crude oils when submitted to thermal stress during deep burial. Kerogen or their mixture i.e at the outset kerogen ( type - 03 kerogen... Generation is also important in other connective tissues such as shale form a source rock or material. At approximately 2.1 km2,100 m 6,889.764 ft 82,677.21 in the original organic matter that is composed a... 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