Experimental and mathematical modeling of fluid flow in microchannels with varying void volume in relation to the question of studying the fluid flow in hydrocarbon source rocks
A shale plays mining is followed with changes of filtration and capacitance parameters due to physical and chemical transformations of kerogen during a filtration in oil source rocks. Complex kinetics of such processes should be considered in mathematic simulation that is required a development of new experimental methods for their verification.
In work the method of experimental study is developed for dynamics of changes of filtration and capacitance parameters of void space. Experimental setup is made for recording of flow parameters in microchannels corresponding to physical model of filtration medium by way of polymer microfluidic device made by using soft lithography. Dynamic change of microchannel permeability is reached by virtue of polymer swelling when interacting with active fluids (alkanes, esters).
Dynamic parameters of fluids flow in fabricated microchannels are obtained (water, alkanes, esters). It’s found that used active liquids lead to essential change of microchannel permeability under their flow through the microchannel.
Mathematical model is developed for the flow of active fluid through the channel with permeability changed dynamically due phenomena described above.
Numerical simulation is made for physical experiment contained in simulation of active fluid flow through the channel fabricated in polymer and followed by swelling and deswelling of polymer. A number of physical parameters are empirically estimated. A qualitative agreement is obtained for simulation and experimental results.
For the first time ever in the work the using of polymer swelling is introduced for imitation of kerogen releasing from oil source rock that leads to change of filtration parameters. The procedure is developed for physical and numerical experiments for determination of filtration and capacitance parameters of the model during of active agent flow in microchannels with permeability changed dynamically.