Quantitative fluorescent logging method for expanding crude-oil linear analysis range

A technology with analytical range and linear range, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve problems such as increased cost, inability to quickly and accurately reflect on-site conditions, cumbersome and time-consuming measurement process, etc., to avoid high concentration quenching effect.

Inactive Publication Date: 2007-01-17
XIAMEN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the following problems: 1. A large amount of reagents are wasted after multiple dilutions, which increases the cost; 2. Due to the use of a large amount of organic solvents, it is particularly unfavorable to the health of on-site testers in a small space; 3. .During the rapid drilling process using the

Method used

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  • Quantitative fluorescent logging method for expanding crude-oil linear analysis range
  • Quantitative fluorescent logging method for expanding crude-oil linear analysis range
  • Quantitative fluorescent logging method for expanding crude-oil linear analysis range

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Condensate oil mother liquor with a concentration of 1000mg / L was prepared with n-hexane as solvent. The prepared condensate oil mother liquor is diluted with n-hexane to form a diluted condensate oil solution with a concentration of 5-300 mg / L.

[0039] The prepared diluted condensate oil solution is used in a conventional fluorescent liquid pool to scan the constant energy synchronous fluorescence spectrum on a fluorescence spectrophotometer with a constant energy synchronous scanning function in a vertical irradiation mode to obtain the linear range of crude oil. The steps are as follows:

[0040] 1. Set the wavenumber difference of constant energy synchronous scanning of the fluorescence spectrophotometer to 1400cm -1 .

[0041] 2. Pour the diluted condensate oil solution prepared above into 10mm×10mm conventional liquid pools, let the excitation light irradiate the liquid pools in a vertical manner, and scan the constant energy synchronous fluorescence spectrum ac...

Embodiment 2

[0045] Similar to Example 1, the difference is that the crude oil adopts medium crude oil, and the results are shown in Table 1 and figure 2 b and Figure 4 .

Embodiment 3

[0047] Similar to Example 1, the difference is that the crude oil adopts wood crude oil, and the results are shown in Table 1 and figure 2 c and Figure 5 .

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Abstract

A quantitative fluorescence logging method to amplify the linear analysis range of the crude oil is provided in the invention. It prepares the 500-10000mg/L crude oil mother liquid using the normal hexane as the dissolvent; it dilutes the crude oil mother liquid to four parts of 5-300mg/L dilution crude oils. The dilution crude oil is put into the normal liquid bath or the thin liquid bath, then it is scanned by the fluorescence spectrometer with the constant energy isochronous scanning function in the vertical irradiation mode or the front surface irradiation mode to get the crude oil linear range. The linear range can reach to 300mg/L of the different crude oil.

Description

technical field [0001] The invention relates to a quantitative fluorescence mud logging method, in particular to a quantitative fluorescence mud logging method by expanding the linear analysis range of crude oil. Background technique [0002] Petroleum is a very complex mixture composed of many compounds, and its physical and chemical properties are also quite complex and changeable. Crude oil varies from a colorless liquid to a black viscous tar, and some are even solid at room temperature. Due to the presence of polycyclic aromatic hydrocarbons, most oils can fluoresce. Therefore, fluorescence technology can be used as a fast, non-destructive and important means of analyzing oil, and has a place in many geological logging methods for oil exploration (1, Patra D, Mishra A K, Talanta, 2001, 53: 783; 2. Patra D, Mishra A K, Anal. Bioanal. Chem. 2002, 373: 304.). [0003] Aromatic hydrocarbons in crude oil (i.e., fluorophores) transition from the ground state to an unstable ...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 李耀群邹哲祥
Owner XIAMEN UNIV
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