Properties of gases and petroleum liquids derived from terrestrial kerogen at various maturation levels

Computer Science

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Gaseous Fuels, Hydrocarbon Fuels, Kerogen, Oil Fields, Petroleum Products, Shale Oil, Chemical Analysis, Chromatography, Crude Oil, Liquefied Gases, Sandstones

Scientific paper

The paper presents a study dealing mainly with shale-sandstone series in which the disseminated kerogen is mostly composed of land-derived debris. Organic matter was characterized by microscopic and chemical techniques, while the kerogen maturity was assessed by microscopic studies, mainly by means of vitrinite reflectance measurements. The oil and gas properties are tentatively interpreted in terms of maturity, using a comparison of oil properties with the kerogen features of shales interbedded in the impregnated sandstone reservoirs. In low maturity stages (immature zone), dry gas with minor condensate is observed, whereas in higher maturity levels (oil window), wet gas with high paraffinic crudes is generally recorded. Shallow depth condensates and their related gases have been identified as immature fluids. In conclusion, it is noted that the study offers a maturity frame work as a guide for oil and gas prediction in shale sandstone sequences containing land derived kerogen.

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