Method for removing water-soluble polymer in polymer-bearing crude oil

Abstract

The invention provides a method for removing a water-soluble polymer in polymer-bearing crude oil. The method comprises the following steps: uniformly adding a barium carbonate particle into the polymer-bearing crude oil, then radiating the obtained crude oil mixture in a microwave environment and carrying out filtering so as to effectively remove the water-soluble polymer in the polymer-bearing crude oil. The objective of the invention is to provide the method for removing the water-soluble polymer in the polymer-bearing crude oil to overcome the problems of difficult demulsification of the polymer-bearing crude oil produced after polymer flooding on the ground and during transporting, reduced efficiency of a heater, high cost of a de-emulsifier and the like. The method can remove the water-soluble polymer in the polymer-bearing crude oil and has the advantages of easiness in operation and realization and low cost; the barium carbonate particle used in the invention has the characteristics of regeneration performance and repeated usability, so cost of the method is reduced; and the method is applicable to technological treatment of polymer-bearing crude oil produced from a polymer flooded oil reservoir.

Description

technical field [0001] The invention relates to a crude oil treatment method, in particular to a method for removing water-soluble polymers in poly-containing crude oil. Background technique [0002] Polymer flooding can effectively improve sweep efficiency, and is an important technology for enhancing oil recovery in high water-cut oilfields. It has achieved good effects in increasing oil production by reducing water in oilfield applications. However, since the water-soluble polymers used in oil field stimulation will be extracted together with the crude oil after a period of production, it is difficult to break the emulsion when processing crude oil on the ground, which brings inconvenience to crude oil treatment and crude oil export; in addition , in the current surface oil-water treatment device, crusts will appear in the equipment when there is polymer, which will affect the normal use of the device. At present, heat exchangers or adding demulsifiers to crude oil are m...

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Problems solved by technology

[0003] The present invention makes improvements to the problems existing in the above-mentioned prior art. The purpose of the present invention is to solve the problem that the heat transfer efficiency of the heating treatment device is significantly reduced when the polymer-containing crude oil produced after polymer flooding is demulsified on the ground and exported. , the problem of adding a demulsifier to increase the cost, providing a rapid method for removing water-soluble polymers in crude oil containing poly