A New Method for Research on Unsteady Pressure Dynamics and Productivity of Ultralow-Permeability Reservoirs

Table 3

Well-test interpretation statistics for offshore low-permeability wells.

Well name	Logging permeability	Well-test permeability	Skin factor	Well-test interpretation model			Drilling fluid density	Drilling fluid immersion time
	mD	mD	—	Well model	Stratigraphic model	Boundary	g/cm^3	h
1	7.6	4.4	21.4	Vertical	Composite	Fault	1.3	<1200
2Sa	4.5	1.1	-1.01	Vertical	Composite	Infinity	1.08	48
2	10.2	3.5	2.08	Vertical	Composite	Infinity	1.25	600
3d	16	0.9	-0.28	Vertical	Composite	Infinity	1.3	672