Multi-branched high-molecular demulsifying main agent and efficient crude oil demulsifier

Abstract

The invention provides a multi-branched high-molecular demulsifying main agent and an efficient crude oil demulsifier. The multi-branched high-molecular demulsifying main agent has a structure represented by formula (I). The efficient crude oil demulsifier comprises, by mass, 25-50% of the multi-branched high-molecular demulsifying main agent, 15-30% of a paraffin-control viscosity reducer, 10-20%of a penetrant, 5-15% of an antifreeze agent and 15-40% of a solvent; and the multi-branched high-molecular demulsifying main agent is the multi-branched high-molecular demulsifying main agent of theformula (I). The efficient crude oil demulsifier is obtained by using the multi-branched high-molecular demulsifying main agent is used as a main agent and mixing with the paraffin-control viscosityreducer, the penetrant, the antifreeze agent and the solvent, the paraffin-control viscosity reducer and the penetrant further assist the multi-branched high-molecular demulsifying main agent, and theparaffin-control viscosity reducer, the penetrant and the multi-branched high-molecular demulsifying main agent are compounded to achieve synergistic effects, so good demulsifying conditions and a good demulsifying environment are provided for efficient and rapid demulsification, and a good demulsifying effect is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a multi-branch polymer demulsifier main agent and a high-efficiency crude oil demulsifier. Background technique [0002] With the continuous deepening of oil exploration, enhanced oil recovery methods are more and more widely used, the composition of crude oil production fluid is becoming more and more complex, the water and inorganic salts in the crude oil emulsion increase, making the emulsion more stable, and the difficulty of crude oil demulsification increases. If the crude oil in this state is collected, transported and refined without treatment, it will easily cause equipment corrosion, fouling, and tower flushing during the crude oil refining process, resulting in danger and economic losses. [0003] Crude oil demulsification methods include: electric demulsification method, gravity sedimentation method, ultrasonic demulsification method, centrifugal demuls...

AI Technical Summary

Problems solved by technology

At present, the demulsifiers used are mainly epoxidized copolymers with high carbon alcohol as the initiator, and block polyether demulsifiers with resin as the initiator. These main agents have poor demulsification effect on high-salt and high-water crude oil. , the desalination rate and dehydration rate are low, and there is still a high salt content and water content after dehydration, which cannot better meet the mining needs

Images