A kind of polymer type heavy oil demulsifier and preparation method thereof

Abstract

The invention relates to a polymer type thick oil demulsifying agent and a preparation method thereof. The polymer type thick oil demulsifying agent contains the following components in percentage by weight: 40-60% of demulsifying agent host, 1-5% of pH regulating agent, 1-5% of solid wetting agent, and 30-50% of solvent. The demulsifying agent disclosed by the invention has the advantages of being strong in demulsifying capability, high in demulsifying speed, low in use amount, and low in demulsifying temperature, and can be widely applied to the crude oil demulsifying process in the fields of crude oil extraction, petroleum refining and the like.

Description

Technical field: [0001] The invention relates to technical fields such as crude oil exploitation and processing, and more specifically relates to a polymer type heavy oil demulsifier and a preparation method thereof. Background technique: [0002] The global recoverable reserves of heavy oil are about 400 billion tons, which is 2.7 times the recoverable reserves of conventional crude oil (150 billion tons). After more than 20 years of development, the annual output of heavy oil and tar sands has increased from 20 million tons to nearly 100 million tons. More than 70 heavy oil fields have been discovered onshore in China, with a total geological reserve of about 1.2 billion cubic meters. The annual production has increased from 1 million tons in 1985 to 13 million tons, accounting for 9% of the total onshore crude oil production. The cumulative production has exceeded 100 million tons. Tons; heavy oil in offshore oilfields accounts for 70%, and the development of heavy oil p...

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Problems solved by technology

[0004] In recent years, research on heavy oil demulsifiers has mainly focused on non-ionic polyether demulsifiers and their composite products. For example, in patent CN 103642518 B, epoxy polyether A and epoxy polyether B are used in a molar ratio of 1:( 0.9 to 1.1) is dissolved in xylene to obtain a viscous oil demulsifier with less dosage and good demulsification and dehydration effect, but the demulsification temperature of the demulsifier is high, energy consumption is large, and dehydration time is long; Ether-type heavy oil demulsifiers are developed, such as patent CN 101255354 B, using acrylic acid series monomers as raw materials to synthesize a non-polyether demulsifier with good hydrophilic and lipophilic properties and good demulsification effect, but the demulsifier Large dosage, high cost

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