Research on the Definition of Economic Limits for the Development of Unconventional Natural Gas under New Situations

Table 6

Economic infeasibility probabilities at different well spacings.

Density (well/km^2)	Well spacing (m × m)	Recovery (%)	P (NPV <0) (%)
6.25	400 × 400	50.56	31.2
7.14	400 × 350	54.98	39.7
8.16	350 × 350	57.24	56.7
9.52	350 × 300	58.45	82.7
11.11	300 × 300	59.11	92.3