Abstract
The fractional calculus approach is introduced into the seepage mechanics. A three-dimensional relaxation model of viscoelastic fluid is built. The models based on four boundary conditions of exact solution in Laplace space for some unsteady flows in an infinite reservoir is obtained by using the Laplace transform and Fourier sine and cosine integral transform. The pressure transient behavior of non-Newtonian viscoelastic fluid is studied by using Stehfest method of the numerical Laplace transform inversion and Gauss–Laguerre numerical integral formulae. The viscoelastic fluid is very sensitive to the order of the fractional derivative. The change rules of pressure are discussed when the parameters of the models change. The plots of type pressure curves are given, and the results can be provided to theoretical basis and well-test method for oil field.
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Wang, Q., Tong, D. The Flow Analysis of Viscoelastic Fluid with Fractional Order Derivative in Horizontal Well. Transp Porous Med 81, 295–303 (2010). https://doi.org/10.1007/s11242-009-9401-6
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DOI: https://doi.org/10.1007/s11242-009-9401-6