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

Table 4

Distribution of some parameters in the development plan of Block Ji 4&10.

Original data	Distribution	Unit
Abundance	X∼N(1.0,0.4)	10^8 m^3/km^2
Depth	X∼N(1300,1350)	m
Quality	The sulfur content in this block is very low and negligible.	—
Stable production time	(5.2, 6.7, 9.5, 11.1)	Year
Gas recovery rate	(3.1%, 3.7%, 4.3%)	—
Lapse rate	(5%, 8.12%, 11%)	—
Fracturing cost	(30, 45, 55)	RMB 10^4/layer
Well density	(6.25, 8.16, 11.11)	Well/km^2