Nature of the pressurizing medium and evolution of the transformation ratio of kerogen: Consequences on kinetic parameters

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:126553

Michels, R; Landais, P; Mansuy, L ^[1]

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1. CNRS-CREGU, Vandoeuvre les Nancy (France); and others

Time, temperature as well as the nature of the organic matter are considered as the most important parameters in maturation models. However, recent considerations of natural and laboratory data indicate that pressure can induce significant effects on the thermal evolution of kerogen. Experimental data have shown that the extent of the pressure effect is a function of the nature of the pressurizing medium (i.e. water or organic effluents). Depending on the pyrolysis medium and on the value of pressure, the rate of thermal breakdown of the organic matter is significantly different. As a consequence, the organic matter transformation ratio measured by programmed pyrolysis of the residual kerogen (Rock-Eval S2 peak, Pyromat data, TG-FTIR), by the amount of bitumen or expelled pyrolyzate generated, by the release of single hydrocarbons, can be drastically modified. This can have significant consequences on the derived kinetic parameters and their interpretation. It is therefore important to be able to estimate the influence of each pyrolysis variable on the kinetic calculations and how it relates to the natural maturation process in sedimentary basins.

• OSTI ID: 126553
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
CHEMICAL COMPOSITION
DECOMPOSITION
HYDROCARBONS
KEROGEN
KINETICS
MATURATION
OIL SHALES
PRESSURE DEPENDENCE
SEDIMENTARY BASINS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE