Test method for stability of water in crude oil

A technology for stability testing and crude oil, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of poor reproducibility and large differences, and achieve the effect of stable test conditions and good reproducibility

Inactive Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +3
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the water content in the crude oil is tested by the oil film microscopic observation method at present, the test result is greatly different from the actual working conditions, and the reproducibility is poor. Test the water content in crude oil according to the actual working conditions in storage and transportation. The test conditions are stable and the test results are reproducible. A test method for water stability in crude oil

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  • Test method for stability of water in crude oil

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Embodiment Construction

[0018] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0019] Such as figure 1 Shown, a kind of water stability test method in crude oil specifically comprises the following steps:

[0020] Step 1: Use a high-speed centrifuge to dehydrate the crude oil to be tested; the speed of the high-speed centrifuge is not less than 10,000 rpm.

[0021] Step 2: Weigh the dehydrated crude oil to be tested, and add the dehydrated crude oil to be tested into the test bottle; the test bottle is a dry and sealed glass bottle.

[0022] Step 3: adding deionized water to the crude oil to be tested to form an oil-water mixture; the proportion of deionized water is 0.1% of the crude oil to be tested.

[0023] Step 4: Stir the mixed solution for 24 hours by magnetic stirring method to form a stable oil-water emulsion as the test solution;

[0024] Step 5: Stand still for 24 hours, use an ultrasoni...

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Abstract

Relating to the technical field of crude oil corrosion prevention technologies, the invention discloses a test method for the stability of water in crude oil, and solves the problems of great difference between the test result and actual operating conditions, poor reproducibility and the like in existing oil film microscopic observation method for testing the water content of crude oil. The test method for the stability of water in crude oil specifically includes the steps of: employing a high speed centrifuge to dehydrate to-be-tested crude oil; weighing the dehydrated to-be-tested crude oil, and adding the dehydrated to-be-tested crude oil into a test bottle; adding deionized water into the to-be-tested crude oil to form an oil-water mixed solution; stirring the mixed solution for 24h by magnetic stirring to form a stable water-oil emulsion to serve as the test fluid; conducting standing for 24h, employing an ultrasonic oscillator to simulate crude oil storage and transport conditions, and carrying out dehydration operation on the test fluid; testing the electrical characteristics of a test bottle bottom solution by a test electrode, and judging whether water precipitates.

Description

technical field [0001] The invention belongs to the technical field of crude oil corrosion protection, and in particular relates to a test method for water stability in crude oil. Background technique [0002] During the extraction of crude oil, it is impossible to completely remove the water carried in the formation crude oil. Although the water-carrying crude oil has undergone pretreatments such as electric dehydration and heating and sedimentation, most of the water has been removed, but a small amount of water still enters the main export pipeline. Water usually exists in two forms in crude oil: the first is oil / water emulsion, water is evenly dispersed in crude oil in the shape of very small water droplets, forming a finely dispersed emulsion solution, which is difficult to separate; the second is Water / oil emulsion, water is free or dissolved in crude oil, suspended in oil in the form of water droplets, this part of water may be precipitated from crude oil under certai...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 黄贤滨倪广地赵文明曹旦夫宋晓良
Owner CHINA PETROLEUM & CHEM CORP
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