Rapid crude oil and organic matter saturated hydrocarbon complexation analysis method

An analysis method and organic matter technology, applied in the fields of geological exploration and geochemistry, can solve the problems of low efficiency, long period, low closure degree of urea complex method, etc., and achieve the effects of improved resolution, high adsorption and simple operation.

Inactive Publication Date: 2020-01-10
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The closure degree of the urea complexation method is low, and the effect of separation is not very good, while The molecular sieve complexation separation operation is complex, the cycle is long, the efficiency is low, and a large number of samples cannot be separated

Method used

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  • Rapid crude oil and organic matter saturated hydrocarbon complexation analysis method
  • Rapid crude oil and organic matter saturated hydrocarbon complexation analysis method
  • Rapid crude oil and organic matter saturated hydrocarbon complexation analysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of fast crude oil and organic saturated hydrocarbon complex analysis method, carry out according to the following steps:

[0038] Step 1. Weigh the sample: Weigh 10-50 mg of the saturated hydrocarbon sample in crude oil or organic matter into a 50 ml beaker.

[0039] Step 2. Weigh the complexing agent: Weigh the ZSM-5 molecular sieve complexing agent that is 50-100 times the weight of the sample described in step 1. The molecular sieve needs to be activated in an oven at 450°C for 4 hours before use, and then close the oven and let it cool naturally. Cool down and take out for later use.

[0040] Step 3. Pipette the isooctane solution: pipette 30-40ml of the isooctane solution into the beaker containing the sample.

[0041] Step 4, dissolving the sample: the weighed complexing agent is mixed with the obtained beaker containing the sample, stirred, and placed in an ultrasonic instrument for 20 minutes until the complexing agent fully absorbs the normal alkanes in...

Embodiment 2

[0046] Adopt the method described in above-mentioned embodiment 1 to light crude oil (from L17-2 gas reservoir condensate oil, density 0.8183g / cm2 in Qiongdongnan Basin, South China Sea 3 , 20°C) for complexation reaction, the experimental results are as follows figure 1 As shown, wherein, the left figure (a) is the biomarker spectrum before complexation, and the right figure (b) is the biomarker spectrum after complexation. From the spectra before and after complexation, it can be seen that the response abundance of sterol and terpane biomarkers before complexation is not high, the information of typical biomarkers is not obvious, and the source rock parent material type cannot be highlighted, which directly affects the Reliability of hydrocarbon source comparison in gas reservoirs; n-alkanes in the spectrum after complexation completely disappear, the mass chromatogram signals of M / Z=191 and M / Z=217 have increased by an order of magnitude, and the quality of the spectrum has...

Embodiment 3

[0048] Adopt the method described in above-mentioned embodiment 1 to medium crude oil (from the W22-9 oil field crude oil of South China Sea Beibu Gulf Basin, density 0.8932g / cm3 , 20°C) for complexation reaction, the experimental results are as follows figure 2 As shown, the comparison data before and after complexation and the biomarker parameters are shown in the following table. By comparing the spectrograms and the following data comparisons, a kind of fast crude oil and organic saturated hydrocarbon complex analysis method of the present invention only adsorbs normal alkanes. Removal will not affect the content of biomarker compounds to be tested.

[0049] Table 2 Comparison data before and after complexation and biomarker parameters

[0050] Biomarker parameters Before complexation After complexation Ts / Tm 2.00 2.05 Orane / C30H 0.12 0.12 Morane / C30H 0.15 0.15 C31 Hopane 22S / (22S+22R) 0.58 0.61 C27 cholestane, % 46.49 46.5...

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Abstract

The invention discloses a rapid crude oil and organic matter saturated hydrocarbon complexation analysis method. By performing complex formation separation on crude oil and organic matter saturated hydrocarbons by virtue of the method disclosed by the invention, n-alkanes as well as cycloalkanes and isoalkanes can be effectively separated, and concentration computer detection is performed on the cycloalkanes and the isoalkanes, so that biological marker compounds such as sterane and terpane required by research can be detected, spectrograms before and after complexation are compared, and resolutions of the biological marker compounds are effectively improved on the basis that chromatographic peaks and biological marker parameters are basically consistent, so that research needs are met.

Description

technical field [0001] The invention belongs to the technical field of geological exploration and geochemistry, and in particular relates to a rapid crude oil and organic saturated hydrocarbon complex analysis method. Background technique [0002] Biomarker compounds refer to those derived from living organisms in sedimentary organic matter, crude oil, oil shale, and coal. They have certain stability during the evolution of organic matter, and basically retain the original carbon skeleton that is a component of the five-year plan. Organic compounds that are affected by the effects of migration, migration, etc., and record the special analytical structure information of the original biological parent material, are of great significance to the study of the parent material type, evolution degree, oil and gas migration, and oil and gas source comparison of organic matter. [0003] For crude oil or organic saturated hydrocarbon samples with few biomarker compounds, when detected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14G01N30/72G01N30/88
CPCG01N30/02G01N30/06G01N30/14G01N30/72G01N30/88G01N2030/067G01N2030/8854
Inventor 黄合庭税蕾蕾陈金定张超张群杨宝伟
Owner CHINA NAT OFFSHORE OIL CORP
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