Method for preparing high purity kerogen

Abstract

The invention provides a method for preparing high purity kerogen. The method comprises pulverizing a sample, carrying out sampling, orderly carrying out water immersion treatment, hydrochloric acid treatment, hydrochloric acid-hydrofluoric acid treatment and heavy liquid flotation test on the crushed sample, in order to solve the problem that effective layering is unsuccessful in the heavy liquid flotation test, treating the sample subjected to hydrochloric acid-hydrofluoric acid treatment through dilute nitric acid having a mass fraction of 1-5%, carrying out arsenic-free zinc granule-hydrochloric acid treatment, and carrying out heavy liquid flotation to obtain kerogen. The method solves the problem that partial sample heavy liquid flotation cannot realize effective separation, removes inorganic minerals such as pyrite in the kerogen and prepares high purity kerogen. Through the method, data is stable and inorganic mineral disturbance is avoided in later geochemistry, structuralism and petrologic analysis.

Description

technical field [0001] The invention relates to a method for preparing high-purity kerogen, which belongs to the technical field of petroleum geological exploration. Background technique [0002] Kerogen refers to a solid high molecular polymer that is widely dispersed in rocks, insoluble in organic solvents at normal temperature and pressure, has no specific composition and structure, and has complex components. Kerogen is the main body of organic matter in sedimentary rocks, accounting for about 80% to 90% of the total organic matter. Modern petroleum geology believes that more than 80% of petroleum hydrocarbons are transformed from kerogen. Petroleum geologists have paid more and more attention to the study of kerogen, and have conducted in-depth discussions on the geochemical, structural and petrological characteristics of kerogen. However, almost all of these studies and tests rely on kerogen purity. Especially in the study of kerogen geochemistry, it is required to ...

AI Technical Summary

Problems solved by technology

This method can quickly reduce a part of the amount of pyrite, but the broken fine powdery pyrite particles may also be surrounded by kerogen, and float on the surface of the heavy liquid with the kerogen during heavy liquid separation, affecting the kerogen Separation, also cannot remove all pyrite

In addition, the sinking part of the samples also took away a considerable amount of kerogen, resulting in greater loss of kerogen and differentiation, and the final recovered kerogen could not represent the overall characteristics

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