The invention discloses a thick oil emulsifying 
viscosity breaker for tracing steam, and a preparation method and application method thereof. The 
viscosity breaker comprises the following components in parts by weight: 75-80 parts of 
sodium fatty amine polyethenoxy 
ether carboxylate, 10-15 parts of alkaline assistant and 1-5 parts of 
small molecule alcohol. The molecular formula of the 
sodium fatty amine polyethenoxy 
ether carboxylate is disclosed as Formula (1), wherein n is any whole number 
ranging from 12 to 18, x is any whole number 
ranging from 2 to 5, and y is any whole number 
ranging from 2 to 5. The thick oil emulsifying 
viscosity breaker for tracing steam is compounded from the main agent 
sodium fatty amine polyethenoxy 
ether carboxylate, the synergist alkaline assistant and the penetrant 
small molecule alcohol with water. The obtained viscosity breaker has high 
temperature resistance and 
salt resistance, can quickly emulsify the thick oil with higher 
colloid asphalt content, has the advantages of favorable viscosity breaking effect and the like, and can be automatically demulsified. The thick oil emulsifying viscosity breaker for tracing steam satisfies the viscosity breaking requirements for high-temperature high-
salinity high-
colloid-
asphalt super-thick oil, and is suitable for tracing 
steam injection in steam soak and steam displacement.