Wellbores are usually located in saturated geological layers. The determination of pore water pressure field around the wellbore is necessary during design calculation and drilling stages. This paper presents analytical approach to determine a horizontal at deep layer that exhibits heterogeneous, isotropic or transversely behavior. Thus, considered be an infinite medium. well wall, equal mud pr...

A novel high-order approach to numerical modeling of semiconductor devices is presented. The new method is a combination of the classical Fourier-series Galerkin procedure, a special matrix calculus, and fast numerical pseudospectral techniques. The proposed algorithm renders the exact solution (machine precision) of the semiconductor equations in closed form of a trigonometric polynomial. The ...