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Thermal Appraisal Method for Early Diagenetic Evolution Degree of Sediment Organic Matter

A technology of evolution degree and sediment, which is applied in the field of thermal identification of early diagenetic evolution degree of sediment organic matter, can solve the problems of inability to analyze thermodynamic information relationship, inability to obtain thermodynamic information, inability to detect thermal transition behavior, etc.

Active Publication Date: 2018-06-22
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structural transformation, pyrolysis peak temperature, and released volatile organic components in each stage of rock pyrolysis analysis have been reported. Thermal and exothermic dynamics, so the thermal transition behavior without weight loss that occurs during the pyrolysis of sediment organic matter cannot be detected, and the relationship between thermodynamic information and thermal decomposition process cannot be analyzed

Method used

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  • Thermal Appraisal Method for Early Diagenetic Evolution Degree of Sediment Organic Matter
  • Thermal Appraisal Method for Early Diagenetic Evolution Degree of Sediment Organic Matter
  • Thermal Appraisal Method for Early Diagenetic Evolution Degree of Sediment Organic Matter

Examples

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Embodiment 1

[0042] A thermal identification method for the early diagenetic evolution degree of sediment organic matter in continental sedimentary basins, including the following steps:

[0043] Step 1. Pretreatment of sediment samples

[0044] Using a portable gravity-type sediment sampler, 60cm of column core sediment was collected in Bosten Lake, 20 pieces were selected, and the sediment was separated by 3cm on site, and put into disposable sealed bags, and the air in the bag was drained, and transported back to the laboratory , the sediment sample was freeze-dried, weighed, ground through an 80-mesh sieve, and frozen for future use.

[0045] Step 2. Thermogravimetric analysis (TGA) of sediment samples

[0046] 10.0 mg of the pretreated sediment sample was placed in a platinum tray, and thermal analysis was performed by a thermogravimetric analyzer (TGA) to obtain a TGA curve;

[0047] Step 3. Differential calorimetry scanning (DSC) of sediment samples

[0048] 10.0 mg of the pretre...

Embodiment 2

[0084] A thermal identification method for the early diagenetic evolution degree of sediment organic matter in continental sedimentary basins, including the following steps:

[0085] Step 1. Pretreatment of sediment samples

[0086] Separate the collected sediment cores by 1 cm and put them into disposable sealed bags; weigh them after freeze-drying, grind them through 80-100 mesh sieves, and freeze them for later use;

[0087] Step 2. Thermogravimetric analysis (TGA) of sediment samples

[0088] 9.8 mg of the pretreated sediment sample was placed in a platinum tray, and thermal analysis was performed by a thermogravimetric analyzer (TGA) to obtain a TGA curve;

[0089] Step 3. Differential calorimetry scanning (DSC) of sediment samples

[0090] 9.8 mg of the pretreated sediment sample was placed in a standard aluminum pan, and a thermal analysis was performed by a differential calorimetry scanner (DSC) to obtain a DSC spectrum;

[0091] Step 4: Interpret the TGA spectrum t...

Embodiment 3

[0105] A thermal identification method for the early diagenetic evolution degree of sediment organic matter in continental sedimentary basins, including the following steps:

[0106] Step 1. Pretreatment of sediment samples

[0107] Separate the collected sediment cores by 2 cm and put them into disposable sealed bags; weigh them after freeze-drying, grind them through 80-100 mesh sieves, and freeze them for later use;

[0108] Step 2. Thermogravimetric analysis (TGA) of sediment samples

[0109] 10.2 mg of the pretreated sediment sample was placed in a platinum tray, and thermal analysis was performed by a thermogravimetric analyzer (TGA) to obtain a TGA curve;

[0110] Step 3. Differential calorimetry scanning (DSC) of sediment samples

[0111] 10.2 mg of the pretreated sediment sample was placed in a standard aluminum pan, and a thermal analysis was performed by a differential calorimetry scanner (DSC) to obtain a DSC spectrum;

[0112] Step 4: Interpret the TGA spectrum...

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Abstract

The invention relates to an identification method for diagenetic evolution degree of sediment organic matters, and in particular relates to a thermal identification method for early diagenetic evolution degree of the sediment organic matters. The method includes: pretreatment of a sediment sample; thermogravimetric analysis (TGA) of the sediment sample; differential scanning calorimetry (DSC) of the sediment sample; TGA spectra interpretation to obtain heat indexes; DSC map interpretation spectra interpretation to obtain heat indexes; and quantitative analysis of organic matter and mineral combination peak. According to the method, by detection of energy changes of the sediment organic matters in different pyrolysis stages for quantitative analysis of the problems of thermal transition behaviors of the sediment organic matters in pyrolysis process and the analysis of organic matter and mineral combination stability, the method for thermal analysis characterization of the early diagenetic evolution degree of the sediment organic matters is established.

Description

technical field [0001] The invention relates to an identification method for the diagenetic evolution degree of sediment organic matter, in particular to a thermal identification method for the early diagenetic evolution degree of sediment organic matter. Background technique [0002] The thermal evolution of organic matter in continental sedimentary basins is an important mechanism for the formation of petroleum under geological-geochemical processes. Understanding the thermal evolution characteristics of organic matter in sediments is an important basis for analyzing the formation mechanism of petroleum. At present, reports on the formation mechanism of oil and natural gas are mainly divided into two theories: First, the theoretical model of hydrocarbon generation by late thermal degradation of kerogen has been widely used to explain the formation, evolution and distribution of conventional oil and natural gas. The second is the hydrocarbon generation model of low-mature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N25/20
CPCG01N5/04G01N25/20
Inventor 郭飞穆云松孙福红冯承莲符志友白英臣朱元荣廖海清吴丰昌
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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