Characteristics of Pores under the Influence of Cyclic Cryogenic Liquid Carbon Dioxide Using Low-Field Nuclear Magnetic Resonance

Table 1

Experimental design of six cores.

Core number	Cycle number	LCO2 injection (min)	Normal temperature (min)	Total cycle time (min)
sx-1	5, 10, 15, 20, 25	5	5	10
sx-2		10	10	20
sx-3		15	15	30
sx-4		20	20	40
sx-5		25	25	50
sx-6		30	30	60