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Type I kerogens

Fig. 8. Typical IR spectrum of microbial (type II) kerogen. The two insets show specific absorption bands of two other kerogens —720 cm-1 related to long aliphatic chains mostly occurring in type-I kerogen —930 to 700 cm-1 related to aromatic CH (bending out of plane) mostly occuring in very mature kerogen (Adapted from Robin 26>, 1975, in Tissot Welte, 1978)24)... Fig. 8. Typical IR spectrum of microbial (type II) kerogen. The two insets show specific absorption bands of two other kerogens —720 cm-1 related to long aliphatic chains mostly occurring in type-I kerogen —930 to 700 cm-1 related to aromatic CH (bending out of plane) mostly occuring in very mature kerogen (Adapted from Robin 26>, 1975, in Tissot Welte, 1978)24)...
This type is usually related to marine organic matter deposited in a reducing environment with medium to high sulfrir content. The hydrogen to carbon ratio and the oil and gas potential are lower than observed for type I kerogen but still very important. [Pg.89]

Table 4.8 Bulk compositional changes in the three main kerogen types with increasing maturity (after Behar Vandenbroucke 1987). Maturity levels are shown by positions of samples in Fig. 4.15. Type I kerogen is based on the Eocene, upper Green River Formation shale from the Uinta Basin type II is based on theToarcian shales of the Paris Basin (France) and Liassic a shales from Germany and type III on the deltaic sequences from the Upper Cretaceous of the Douala Basin (Cameroon) and from the Tertiary of the Mahakam Delta (Borneo)... Table 4.8 Bulk compositional changes in the three main kerogen types with increasing maturity (after Behar Vandenbroucke 1987). Maturity levels are shown by positions of samples in Fig. 4.15. Type I kerogen is based on the Eocene, upper Green River Formation shale from the Uinta Basin type II is based on theToarcian shales of the Paris Basin (France) and Liassic a shales from Germany and type III on the deltaic sequences from the Upper Cretaceous of the Douala Basin (Cameroon) and from the Tertiary of the Mahakam Delta (Borneo)...
Sinninghe DamsteJ.J., de las Heras X.F.C., van Bergen P.F., de LeeuwJ.W. (1993a) Characterization of Tertiary Catalan lacustrine oil shales discovery of extremely organic sulphur-rich Type I kerogens. Geochim. Cosmochim.Acta 57, 389—415. [Pg.356]

Sweeney, J. J., Burnham, A. K. Braun, R. L. 1987. A model of hydrocarbon generation from type I kerogen application to Uinta Basin, Utah. American Association of Petroleum Geologists Bulletin, 71(8), 967-985. [Pg.173]

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See also in sourсe #XX -- [ Pg.3 , Pg.132 ]



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