Method for measuring water content in crude oil

A technology of water content and crude oil, applied in the field of petroleum industry, can solve the problem of high price, and achieve the effects of stable testing, convenient operation and accurate measurement results.

Inactive Publication Date: 2013-02-20
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current disadvantage is that the price is relatively expensive, and there are problems in biological protection and radioactive source management

Method used

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  • Method for measuring water content in crude oil
  • Method for measuring water content in crude oil
  • Method for measuring water content in crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] At 30℃, ρ o =0.7302g.cm -3 As an example, configure a series of oil-water mixture samples with different water content, where ρ w =0.995647g.cm -3 , The configured oil-water mixed sample with known water content is the oil sample to be tested, and the volume V is 10.38cm 3 , Quality m 0 Is 11.6078g pycnometer, according to the formula Calculate the water content of the oil sample to be tested. The specific calculation results are shown in Table 1. When Table 1 is 30℃, the density is 0.7302g.cm -3 The water content measured by formula (3), the parameters of formula (3), the actual water content φ w(s) , Measuring water content φ w(m) , Water content measurement error Δφ w =φ w(m) -φ w(s) .

[0044] According to the test results: the average deviation between the measured water content and the actual value is 0.18%, and the maximum deviation is 0.44%.

[0045] Table 1

[0046]

Embodiment 2

[0048] At 30℃, ρ o =0.8313g.cm -3 As an example, configure a series of oil-water mixture samples with different water content, where ρ w =0.995647g.cm -3 , The configured oil-water mixed sample with known water content is the oil sample to be tested, and the volume V is 10.38cm 3 , Quality m 0 Is 11.6078g pycnometer, according to the formula Calculate the water content of the oil sample to be tested. The specific calculation results are shown in Table 2. When Table 2 is 30°C, the density is 0.8313g.cm -3 The water content measured by formula (3), the parameters of formula (3), the actual water content φ w(s) , Measuring water content φ w(m) , Water content measurement error Δφ w =φ w(m) -φ w(s) .

[0049] According to the test results: the average deviation between the measured water content and the actual value is 0.31%, and the maximum deviation is 0.86%.

[0050] Table 2

[0051]

[0052]

Embodiment 3

[0054] At 30℃, ρ o =0.8847g.cm -3 As an example, configure a series of oil-water mixture samples with different water content, where ρ w =0.995647g.cm -3 , The configured oil-water mixed sample with known water content is the oil sample to be tested, and the volume V is 10.38cm 3 , Quality m 0 Is 11.6078g pycnometer, according to the formula Calculate the water content of the oil sample to be tested. The specific calculation results are shown in Table 3. Table 3 is at 30°C with a density of 0.8847g.cm -3 The water content measured by formula (3), the parameters of formula (3), the actual water content φ w(s) , Measuring water content φ w(m) , Water content measurement error Δφ w =φ w(m) -φ w(s) .

[0055] According to the test results: the average deviation between the measured water content and the actual value is 0.55%, and the maximum deviation is 1.22%.

[0056] table 3

[0057]

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Abstract

The invention discloses a method for measuring water content in crude oil. The method is specially implemented in the following steps of: step 1, using a scale to weigh a mass of a picknometer; and step 2, filling the crude oil into the picknometer, measuring a mass of the picknometer contained with the crude oil, and obtaining the water content in the crude oil by using a pure water and pure oil density combining formula. The method provided by the invention not only has the advantages of simple structural structure and accurate measurement result, but also is not limited by a water content range, an emulsification condition of an oil product, and a condition that whether the oil and the water are layered according to the principle that an oil density and a water density are different at the same temperature, and the principle of mass conservation.

Description

Technical field [0001] The invention belongs to the technical field of the petroleum industry, and specifically relates to a method for determining the water content in crude oil. Background technique [0002] In the process of crude oil production, it is necessary to know the water content in the crude oil at any time so as to monitor the crude oil production. At the wellhead, gathering station, joint station, and oil transmission station, it is necessary to know the water content in the crude oil to control the entire production process, so the detection The water content in crude oil is of great significance to oilfield production. At present, based on the classification method of measurement principle, domestic and foreign crude oil water content analyzers are divided into three categories: electrical characteristic water content analyzer, density method water content analyzer and isotope water content analyzer. [0003] Electrical characteristics water-containing analyzer, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/36
Inventor 侯海云刘松涛董登峰周芳德
Owner XI'AN POLYTECHNIC UNIVERSITY
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