High-water content wax-containing crude oil flowing improver

Abstract

The invention discloses a high-water content wax-containing crude oil flowing improver. The high-water content wax-containing crude oil flowing improver comprises Ninol, sodium oleate and water, wherein a mass ratio of Ninol to sodium oleate to water is (6-10): (1-3): (90-94). After being added into crude oil, the high-water content wax-containing crude oil flowing improver improves fluidity of the crude oil and avoids precipitation of wax on a pipe wall so that low temperature transportation of high-water content wax-containing crude oil is realized. The high-water content wax-containing crude oil flowing improver has a low cost and good compatibleness with a lower treatment agent of crude oil. The high-water content wax-containing crude oil flowing improver can utilize a running watering conveying pipe so that heat supplied by a heating furnace is reduced without a change of the existing equipment. The high-water content wax-containing crude oil flowing improver reduces pipe return pressure, reduces damage caused by pipe perforation, and has a low price, good performances, a less use amount, high economic benefits, good practicability and an industry popularization meaning.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry, and in particular relates to a flow improver for high water content and waxy crude oil. Background technique [0002] High water content and waxy crude oil (such as Wangji block of Henan Oilfield) has a water content of more than 80% (crude oil content is less than 20%), and the wax content of crude oil components is greater than 20%, about 20-45% , The freezing point is around 23-45°C. Not only is wax deposited in the wellbore during oil well mining, which requires a lot of cleaning costs. At the same time, wax will be deposited during the gathering and transportation of crude oil, which often causes blockage and perforation of the gathering and transportation pipelines. Therefore, it is necessary to use natural gas boilers for heating Water mixing system, make the water mixing system temperature higher than 65 ℃, in order to ensure the normal delivery of crude oil. In order to impr...

AI Technical Summary

Problems solved by technology

Not only is wax deposited in the wellbore during oil well mining, which requires a lot of cleaning costs. At the same time, wax will be deposited during the gathering and transportation of crude oil, which often causes blockage and perforation of the gathering and transportation pipelines. Therefore, it is necessary to use natural gas boilers for heating Water mixing system, the temperature of the water mixing system must be higher than 65°C to ensure the normal delivery of crude oil

In order to improve the fluidity of crude oil, some currently commercially available crude oil flow improvers are also added during actual production, but these agents generally have the defects of strong selectivity and limited application range, and are not suitable for high water cut in Wangji Oilfield , high waxy crude oil, and there are also disadvantages of high price, large amount, and high cost of use

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