A New Methodology for the Multilayer Tight Oil Reservoir Water Injection Efficiency Evaluation and Real-Time Optimization

Table 2

Tracer test results of the T1 well group.

Injector	Tracer type & inject date	Tracer well	Tracer breakthrough date	Tracer breakthrough time (day)	Tracer peak concentration (ng/ml)	Duration (day)
T1	Er 3/19/2019	P1	4/14/2019	26	148.66	41
		P2	5/11/2019	54	126.31	30
		P4	5/19/2019	62	97.04	36