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TOUGHREACT是孔隙裂隙介质中多相流体非等温流化学反应的数值模拟程序。矿物集合体与液体之间的反应能在局部平衡或动力速率下发生。气相可以是化学活性的。沉淀和溶解反应能够改变地层的孔隙度和渗透性，也能改变岩石的不饱和流特征。
TOUGHREACT is a numerical simulation program for chemically reactive non-isothermal flows of multiphase fluids in porous and fractured media. The program is written in Fortran 77 and was developed by introducing reactive chemistry into the multiphase flow code TOUGH2 V2. Interactions between mineral assemblages and fluids can occur under local equilibrium or kinetic rates. The gas phase can be chemically active. Precipitation and dissolution reactions can change formation porosity and permeability, and can alsomodify the unsaturated flow properties of the rock.