Novel emulsified viscosity reduction agent

Abstract

The invention relates to a petroleum production auxiliary, and in particular relates to a novel emulsified viscosity reduction agent. The novel emulsified viscosity reduction agent is characterized by being prepared by mixing the following raw materials in parts by weight: 63 to 65 parts of mahogany petroleum sulfonate, 9 to 15 parts of negative ion surface active agent and 20 to 30 parts of PH value adjusting agent, wherein the PH value adjusting agent is prepared by mixing caustic soda and water according to a weight proportion of 50 to 50. The novel emulsified viscosity reduction agent is suitable for thickened oil with viscosity of lower than 2,400 mPa.s and thickened oil with viscosity of higher than 2,400 mPa.s and has the advantages that the mineral salt resistance is high, the thickened oil can be turned from an emulsified state of oil-packaged water into water-packaged oil emulsion, the emulsified thickened oil is low in viscosity, the emulsion cost is low and the like.

Description

technical field [0001] The invention relates to a petroleum production auxiliary agent, in particular to a novel emulsifying viscosity reducer. Background technique [0002] Heavy oil occupies a certain proportion in the reserves and production structure of some oilfields at home and abroad. In the heavy oil production in recent years, it has been found that most of the crude oil liquid produced by heavy oil is water-in-oil (that is, O / W type) emulsion liquid. This kind of crude oil has high viscosity and poor fluidity, which brings many difficulties to the production. . For example, the load on the sucker rod increases, which not only consumes a lot of electric energy, but also increases the mechanical accidents such as the breakage of the sucker rod and the breakage of the rope hanger, resulting in frequent operations; the high viscosity of crude oil will also increase the return pressure of the surface pipeline High, increasing the difficulty of crude oil export, diffic...

AI Technical Summary

Problems solved by technology

[0004] However, among the emulsified viscosity reducers commonly used in oilfields, most emulsifiers are non-ionic surfactants. The production cost of non-ionic surfactants is high and the ability to resist mineral salts is small.

There are also some petroleum additive companies that have developed other types of viscosity reducers, such as US4016932, which reports the method of using uncondensed petroleum sulfonate, nonylphenol polyoxyethylene ether and alkali as an oil displacement agent, which can be used for total ion The concentration is 125000mg / L (Ca 2+ , Mg 3+ Formation water of 5800mg / L), but not suitable for the exploitation of heavy oil and super heavy oil