Numerical Investigations of the Effect of Nonlinear Quadratic Pressure Gradient Term on a Moving Boundary Problem of Radial Flow in Low-Permeable Reservoirs with Threshold Pressure Gradient

Table 2

Comparison data for the computed dimensionless transient wellbore pressure and relative errors.

Computed dimensionless transient wellbore pressure (0, )
()	()	/%	()	()	/%	()	()	/%
	11.22	11.5	2.50	12.73	13.23	3.93	14.11	14.84	5.17
	13.86	14.38	3.75	15.69	16.49	5.10	17.32	18.61	7.45
	15.78	16.41	3.99	17.74	18.89	6.48	19.47	21.30	9.40
	17.33	18.09	4.39	19.4	20.82	7.32	21.17	23.54	11.20
	18.64	19.57	4.99	20.76	22.53	8.53	22.53	25.44	12.92
	19.8	20.86	5.35	21.96	24.03	9.43	23.76	27.14	14.23
	20.85	22.05	5.76	23.08	25.44	10.23	24.76	28.70	15.91
	21.81	23.17	6.24	24.03	26.63	10.82	25.73	30.10	16.98
	22.7	24.18	6.52	24.9	27.79	11.61	26.56	31.41	18.26
	23.49	25.12	6.94	25.67	28.88	12.50	27.29	32.66	19.68