Scholarly record
PECULIARITIES OF FILTRATION IN HETEROGENEOUS ENVIRONMENT TAKING INTO ACCOUNT DIFFERENTIATION OF PRESSURE DISTRIBUTION IN PORES AND FRACTURES
Abstract
The peculiarity of mass transfer in such environment is that motion between the outer surface of the blocks and their inside develops in time creating delay in the response of the blocks to pressure changes in fractures surrounding them. Analysis of these processes on mathematical models has determined that at a certain combination of the flow kinetic parameters a differentiation of pressure distribution in blocks and large fractures occurred. As a result, in filtering of poorly compressible fluids a pressure disintegration of fractured-porous mass structure and development of decreased permeability zones around the wells (skin zone) can take place. Dependence of the flow parameters on the non-linearity and kinetic characteristics of the sorption processes should be noted among the most essential peculiarities of gas flow. Simulation data has allowed to determine a close connection between different bursting liability criteria of coal beds that were opposed in the past.
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