id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-54144	Feng, Naichao; Cheng, Shiqing; Lan, Weixing; Mu, Guoquan; Peng, Yao; Yu, Haiyang	Variable-Permeability Well-Testing Models and Pressure Response in Low-Permeability Reservoirs with non-Darcy Flow	2016	6	.pdf	application/pdf	4117	206	53	Permeability curve of low-velocity non-Darcy flow (i) Through the initial experimental data, plot the flow velocity versus pressure gradient curve V-∆P, then plot the K-∆P curve presenting the relationship between permeability and pressure gradient; (ii) Divide the curve into several linear sections, and consider the permeability of each linear section as a constant; (iii) The finite difference algorithm is employed to discretize the non- linear flow differential equations, and then set up a non-linear equation system in which the pressure is the unknown, and the permeability is a function of pressure gradient, K= K( dp/dr). Influence of non-Darcy effect on non-Darcy type curves In the early section of Figure 4, the type curves in log-log scale coincide as a 45o line, indicating the influence of wellbore storage effect.	cache/esrj-54144.pdf	txt/esrj-54144.txt