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titleSolution



LaTeX Math Block
anchorp_F
alignmentleft
p(t,r) = p_i - \frac{q_t}{4 \pi \sigma} \,  F \bigg( - \frac{r^2}{4 \chi t} \bigg)



LaTeX Math Block
anchorpwf
alignmentleft
p_{wf}(t) = p_i - \frac{q_t}{4 \pi \sigma} \, \bigg[ - 2S +   F \bigg( - \frac{r_w^2}{4 \chi t} \bigg) \bigg]


where

LaTeX Math Inline
bodyF(\xi)
a single-argument function describing the peculiarities of the diffusion model (well geometry, penetration geometry, formation inhomogeneities, hydraulic fractures, boundary conditions, etc.)


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