... z D The initial and boundary conditions for Eq. (14) are: (18) t D = 0 :      s = 1 ,    y = 0 :       s = S w i     These correspond to the condition of unit water saturation in the aquifer prior to injection and the irreducible water...

... (6) k 0 k ( σ s ) = 1 + β σ s where σ s is the concentration of strained particles, k is the absolute permeability, β is the formation damage coefficient and k 0 is the initial permeability and it corresponds to zero value of concentration...

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