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Method for detecting crude oil water content

A technology of oil-water content and determination method, which can be applied in the direction of removing certain components and weighing, etc., can solve the problem of large water content measurement errors in crude oil with medium and high water content, and achieve the improvement of measurement accuracy, reduction of system errors, and resolution of measurement errors. Effect

Inactive Publication Date: 2009-08-12
DAQING OILFIELD CO LTD
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Problems solved by technology

[0003] In order to overcome the deficiencies in the background technology, the present invention provides a method for measuring the water content of crude oil, which solves the problem of large measurement errors in the water content of medium and high water content crude oil, improves the measurement accuracy of the water content of crude oil, and improves the measurement accuracy of the water content of crude oil. test methods

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  • Method for detecting crude oil water content
  • Method for detecting crude oil water content
  • Method for detecting crude oil water content

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with embodiment: this crude oil water content determination method comprises the following steps:

[0023] (1) Instrument materials for measuring water content by centrifugation.

[0024] 1. Centrifugal water content analyzer: The centrifuge can be heated and kept at a constant temperature of 50°C±1°C, and the speed is above 3000r / min.

[0025] 2. Centrifuge tube: 0.2ml for 1-10ml, 0.1ml for 1-0.3ml, and 0.03ml for less than 0.3ml.

[0026] 3. Constant temperature water bath: can immerse the centrifuge tube into the 10ml mark line, and can control the temperature at 50℃±1℃.

[0027] 4. Electronic balance: the measuring range is greater than 2000g, and the precision is greater than 0.1g.

[0028] 5. 10kg narrow mouth bottle, some glass stirring rods.

[0029] 6. The freezer can cool down to below 0°C.

[0030] (2) Mass method weighs the quality of free water in crude oil

[0031] 1. Wipe off the oi...

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Abstract

The invention relates to a method for measuring the water content of crude oil. The emulsified water and suspended water in the crude oil are basically evenly present in the oil, but the free water is not. Distillation or centrifugation is usually used to separate the emulsified water and suspended water in the crude oil, and the free water in the crude oil is basically In the invention, the method of cooling is adopted, that is, when measuring the water content of crude oil, put the crude oil in a freezer to cool down, separate the free water in the crude oil by tilting and stirring, weigh the quality of the free water with an electronic balance, and use centrifugation or Distillation measures the mass of emulsified water and suspended water in the crude oil sample, then calculates the total mass of water in the crude oil sample, and finally calculates the mass percentage of the water content in the crude oil. The method solves the problem of large measurement error of the water content of the medium and high water content crude oil, improves the measurement accuracy of the water content of the crude oil, and improves the determination method of the water content of the crude oil.

Description

Technical field: [0001] The invention relates to a detection method in the field of oil recovery, in particular to a method for measuring the water content of crude oil. Background technique: [0002] Crude oil extracted from oil fields generally contains water to varying degrees. The water content of crude oil refers to the percentage of water in crude oil to the total mass of oil-water mixture. That is to say, the determination of the water content of crude oil uses the mass percentage as the measurement result. These moistures usually exist in emulsified state, suspended state and free state. GB / T8929-88 "Determination of Water Content in Crude Oil" (distillation method) describes in Section 4.2.2, "Before measuring the sample...make the sample and water mix evenly, otherwise the test result will be affected". The determination of the water content of crude oil described above is only suitable for crude oil with emulsified water and suspended water, but not suitable for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 黄清强李金伟赵玉武董凤岩
Owner DAQING OILFIELD CO LTD
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