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.