Method for constructing kerogen average molecular structure model
A technology of molecular structure and construction method, which is applied in the fields of analyzing materials, using wave/particle radiation for material analysis, measuring devices, etc., and can solve problems such as loss of structural information, failure to reflect the average molecular structure of kerogen, and destruction of the chemical structure of kerogen.
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[0071] This example provides a method for constructing an average molecular structure model of kerogen, which takes the shale samples of the Longmaxi Formation in the Sichuan Basin as the research object, and the specific construction process is as follows figure 1 shown, including the following steps:
[0072] (1) Take 10 samples of Longmaxi Formation shale in the Sichuan Basin, crush the samples to a size smaller than 100 mesh, heat 1-2g powder samples to 540°C in a LECO CS230 carbon / sulfur analyzer, and test the TOC content of the samples. A 100mg powder sample was heated from 90°C to 600°C in an oil and gas evaluation (OGE) workstation to obtain the pyrolysis hydrocarbon content (S2) of the sample, and the hydrogen index (HI) of the sample was calculated according to the formula HI=S2×100 / TOC. Table 2 is the sample pyrolysis test results and calculated hydrogen index (HI).
[0073] Table 2
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[0075]
[0076](2) Based on the calculation formulas (1)-(5) of s...
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