@Article{icces.2023.09747,
AUTHOR = {Fengchang Yang},
TITLE = {Modeling of Reactive Flow and Precipitation in Unconventional  Reservoirs},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {3},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n3/55167},
ISSN = {1933-2815},
ABSTRACT = {Mineral nucleation and precipitation commonly occur in nature and plays an important role in many energyrelated applications with reactive flow. For instance, minerals nucleate and precipitate as scale in the pore 
structure in unconventional reservoirs and significantly reduce the permeability of the porous media. This 
phenomenon could lead to a rapid decrease in production and cause significant financial loss. The need to 
predict the dynamic properties of such systems has resulted in questions about the fundamental 
mechanisms of reactive flow as well as mineral nucleation and precipitation in pores. Additionally, there is 
still a discrepancy between laboratory molecular scale findings and large-scale observations. To address this 
discrepancy, modeling methods at the pore scale started gaining interest recently due to the capability of 
capturing reactive and nonreactive species transport, effects of pore topology, and interface chemical 
reaction within the same approach, which typically is difficult to observe directly in experiments. <br/>
For some solutions, especially high saturation index solution, the nucleation process could potentially play 
an important role in the precipitation due to either heterogeneous or homogenous nucleation, which was 
largely overlooked in most previous numerical models for mineral precipitation. In this study, we coupled 
the micro-continuum simulation approach based on Darcy-Brinkman-Stokes (DBS) equation with the classic 
nucleation theory (CNT) to study the stochastic nucleation process in reactive flow. A range of different 
parameters were studied to understand their impact on the nucleation process and precipitation. It was 
discovered that such a nucleation process was affected by the Damköhler number and Peclet number as well 
as other effects. As the precipitation reaction on the crystal surface enhances, the total amount of nucleus 
formed on the substrate decreases due to the depletion of species in the vicinity of the substrate. In general, 
the competition between flow/transport of species and precipitation consumption governs the behavior of 
phase change process and produces different scenarios. The results of this study are expected to shed light 
on the mechanism of liquid-solid interaction within porous medium.},
DOI = {10.32604/icces.2023.09747}
}