Method for calibrating hydrocarbon generation dynamical model parameters by finite first-order parallel reaction

Abstract

The invention discloses a method for calibrating hydrocarbon generation dynamical model parameters by finite first-order parallel reaction and is applied to the technical field of evaluation of hydrocarbon resources. On the basis of a hydrocarbon generation dynamical theory, the method is used for describing a hydrocarbon generation process of an organic matter. By the method, kerogen oiling, kerogen gassing and oil gassing which are greatly different from one another and dynamical processes of different types of organic matters can be separately discussed effectively. Furthermore, by a modelcalibration math method, an optimization approximate solution is performed; therefore, defects of limited calibration precision improvement and relatively redundant calculation quantity which are caused by infinite first-order parallel reaction can be overcome; and calculation without a precise solution under an experimental condition is realized through approximate solution of dynamical parameters. By the method, the description of a complicated process of organic matter hydrocarbon generation and a quantitative and dynamic description for organic matter hydrocarbon generation characteristics are realized effectively.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resource evaluation, relates to the description of kinetic parameters of organic hydrocarbon formation, and is a technique for describing the chemical reaction process of organic hydrocarbon formation based on the principle of hydrocarbon formation kinetics. Background technique [0002] Before the 1990s, the establishment of kinetic models of organic matter hydrocarbon generation and the optimization of parameters began to be explored both at home and abroad. When studying a hydrocarbon formation kinetics feature, the first thing to face is the choice of chemical kinetics principle. The reaction kinetic models that have also been proposed so far include: (1) the total package reaction model, including two subtypes of the total package first-order reaction and the total package non-first-order reaction; (3) parallel first-order reactions, including infinite parallel first-order reactions Fir...

AI Technical Summary

Problems solved by technology

From a kinetic point of view, since the chemical reaction rate is extremely sensitive to changes in the value of the activation energy, the large interval of 10×4.187kJ / mol obviously cannot approximately reflect the bond composition in kerogen, so it cannot be considered Used to approximate the hydrocarbon-forming process of organic matter

This is also one of the important reasons why the model of Tissot et al. has not been widely used since it was proposed.

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