A device and method for measuring the compressibility coefficient of gelled crude oil under pressure
A compressibility and testing device technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of inability to accurately measure the compressibility of gelled crude oil, uneven pressure distribution, large deviation of results, etc., to facilitate cleaning work, volatilization The effect of reduced area and stable properties
Active Publication Date: 2020-08-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
For gelled crude oil with viscoelasticity and yield stress, the existence of the viscoelasticity and yield stress of the gelled crude oil in the compression test method causes the pressure distribution between the crude oil to be uneven, and there is resistance between the crude oil and the container wall, resulting in deviations in the results bigger
Existing compressibility testing devices and methods cannot accurately measure the compressibility of gelled crude oil under different pressures and different shear states
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0038] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...
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The invention discloses a test device and a test method for the compressibility coefficient of gelled crude oil under pressure, comprising a crude oil treatment cylinder, a pressure supply device, an ultrasonic sensor and a signal acquisition device. The crude oil treatment cylinder is a sealable structure, and a stirring rotor is installed inside to provide stirring and shearing; the bottom of the crude oil treatment cylinder is connected with the crude oil inlet and outlet pipes, and the crude oil treatment cylinder and the crude oil inlet and outlet pipes are placed in the temperature control water tank of the temperature control device, and the upper end of the crude oil treatment cylinder It is connected to the crude oil supply device, and the main body of the crude oil inlet and outlet pipe is arranged side by side with the crude oil supply cylinder, and a water bath insulation soft cover is provided on the outside. The pressure supply device communicates with the upper end of the crude oil supply device, and applies a set pressure to the crude oil in the crude oil processing cylinder. The ultrasonic sensor is arranged on the inner wall of the crude oil processing cylinder and connected with the signal acquisition device. By controlling the pressure applied, the temperature of the crude oil, and the rotation speed of the stirring rotor, the ultrasonic velocity of the crude oil under various pressures, temperatures and shear states can be measured to calculate the compressibility coefficient of the crude oil under each state.
Description
technical field [0001] The invention relates to a test device and a test method for measuring the compressibility coefficient of gelled crude oil under pressure. Background technique [0002] More than 80% of the crude oil produced in my country is waxy crude oil with high wax content. Compressibility is one of the basic physical properties of crude oil. Crude oil produced in oil fields is mainly transported through pipelines, and waxy crude oil has a high freezing point and poor fluidity at room temperature, so it generally needs to be heated for transportation. The crude oil transported by heating is heated to a certain temperature at the heating station and then leaves the station, and the temperature of the oil product decreases continuously during the flow along the pipeline; therefore, there is an axial temperature drop between the two heating stations before and after, and the axial temperature drop curve is an exponential curve. When the oil temperature is lower t...
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IPC IPC(8): G01N29/024
Inventor 滕厚兴张淇刘刚卢兴国陈雷
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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