Method for preparing high purity kerogen

A kerogen and sample technology, applied in the field of petroleum geological exploration, can solve the problems of large loss of kerogen, failure to represent the overall characteristics, differentiation, etc., and achieve the effects of data stability, dispersibility and originality

Active Publication Date: 2017-04-26
PETROCHINA CO LTD
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  • Abstract
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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 Separa

Method used

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  • Method for preparing high purity kerogen
  • Method for preparing high purity kerogen
  • Method for preparing high purity kerogen

Examples

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Example Embodiment

[0046] Example 1: Preparation of high-purity kerogen from black shale of Datangpo Formation in ZK2105 well

[0047] This example 1 follows figure 1 The described process prepares high-purity kerogen, that is, the sample is first crushed, weighed, and then subjected to hydrochloric acid treatment, hydrochloric acid-hydrofluoric acid treatment, and heavy liquid flotation test. It is found that the sample cannot be effectively stratified, and then the quality The sample after the hydrochloric acid-hydrofluoric acid treatment is treated with dilute nitric acid with a fraction of 1 to 5%, followed by treatment with arsenic-free zinc particles-dilute hydrochloric acid, and heavy liquid flotation to obtain high-purity kerogen.

[0048] The specific implementation steps are as follows:

[0049] (1) Select 50g of core sample with organic carbon content of 3.5wt%, crush, pass through 80 mesh stainless steel sieve, and take the particle size Samples of <0.18mm are used to separate and prepare k...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N23/20G01N23/225G01N1/28G01N1/34
CPCG01N1/286G01N1/34G01N23/20G01N23/2251
Inventor 张水昌林鹏王华建王晓梅林可心苏劲
Owner PETROCHINA CO LTD
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