000			01468nab a2200181 4500
005			20260520001939.0
008			260224s2010 xxu
245	0	0	_aFormulation of the flow problem in anisotropic porous media using different coordinate transformations
260			_a _b _cdic. 2010
270			_a31/05/2011 ; 31/05/2011
300			_a5 p. ; 203-208
520			_aTranscripción del resumen del autor: To solve an anisotropic flow problem, we transform the problem into an equivalent isotropic problem. We expect that an anisotropic solution can be readily obtained from the equivalent isotropic solution. However, sometimes it is not the case. In this paper we use the drawdown equation of a fully-penetrated vertical well test, and the drawdown and buildup equations for a probe test to discuss when we can and when we cannot directly obtain an anisotropic solution from an isotropic solution in this paper. Due to the fact that transformation causes the changes in flow geometry and the shape of the wellbore or probe, we have to modify the equivalent isotropic solution to obtain the anisotropic solution. Finally, we present a case that the horizontal well productivity was incorrectly derived in a published paper, due to the misuse of the concept of anisotropy.
581			_a1-2
773	0		_tJournal of Petroleum Science & Engineering _g75
942			_cARTICULO
100	1		_aSheng, J.J. _945767
999			_c182243 _d182243