A study of models of micro- stratigraphy of coal seams

摘要

The coal-forming process of the main seam 6 in Jungar coalfield has been simulated with the mathematics analytical method of the Markov stochastic process, the mathematics model of its micro-stratigraphy is established, and then the sequence of coal microlithotypes is resulted from the model application. The abundance, location, band thickness of the microlithotypes can be forecasted by this sequential microlithotype model, combining the coalbed gas generation, storage, preservation, initial migration and the displacement pressure, pore diameter, permeability of the maceral and the developmental character of the cleat system in the seam, the most advantageous location of the CBG recovery can be determined. A new method has been established for the evaluation of the geological conditions of the coalbed gas resource.