Testing device and method for quantitatively representing influence of shear effect to aggregation behavior of waxy crystals

Abstract

The invention relates to a testing device and method for quantitatively representing the influence of a shear effect to an aggregation behavior of waxy crystals. The method comprises the following steps: (1) photographing a waxy crystal image synchronized to a wax-bearing crude oil shear mode; (2) generating and dividing grey information of the waxy crystal image, and extracting a grey image; (3) acquiring characteristic parameters of a spatial curved surface of the grey image of waxy crystals; (4) determining a waxy crystal fractal dimension; (5) repeatedly carrying out the steps (1) to (4), so as to obtain acquire waxy crystal fractal dimensions under other shear effects; and (6) establishing a function relationship between the shear effect and the waxy crystal fractal dimensions, and quantitatively representing the influence of the shear effect to the aggregation behavior of the waxy crystals by virtue of size distribution of the waxy crystal fractal dimensions and a change rule of the waxy crystal fractal dimensions. According to the device and the method, the problems that the photographing of the waxy crystal image cannot be synchronized to different hydrodynamic conditions of the wax-bearing crude oil, image grew information is lost when the aggregation behavior of the waxy crystals is represented, and quantification parameters are not reliable in the prior art are solved.

Description

[0001] 1. Technical field: [0002] The present invention relates to waxy crude oil pipeline transportation technology, when describing the mechanism of wax deposition in the shear flow field from the perspective of thermodynamics and dynamics, it solves the shape and structure of wax crystals precipitated in the crude oil under the influence of the shear effect of pipeline transportation, especially It is a technical problem of quantitative characterization of its aggregation behavior, specifically related to the experimental device and method for quantitative characterization of the influence of shear effect on the aggregation behavior of wax crystals. [0003] 2. Background technology: [0004] Under the background that my country's dependence on foreign crude oil is increasing year by year (in 2015, it broke through 60% for the first time, reaching 60.6%; in 2016 or nearly 65%), in order to ensure "oil security", in addition to increasing exploration efforts to find new oil ...

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide quantitatively characterizing the test device that shear effect influences wax crystal aggregation behavior, another object of the present invention is to provide quantitative characterizing shear effect to the test device quantitative characterization method that quantitative characterizes shear effect influences wax crystal aggregation behavior, it uses To solve the problem that the existing technology cannot synchronize the different hydrodynamic conditions experienced by waxy crude oil when taking wax crystal images, and when characterizing the wax crystal aggregation behavior, the image grayscale information will be lost, especially the wax crystal structure in the distribution area is idealized problems that make quantitative parameters unreliable

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