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A Method for Determining the Lithology of Hydrocarbon Source Rocks

A source rock and lithology technology, applied in the field of determining source rock lithology using ethyl noradamantane compounds, can solve the problems of low dependence and inaccurate judgment

Active Publication Date: 2022-03-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Determining the lithology of source rocks is one of the foundations of oil and gas exploration, but the existing methods for determining lithology of source rocks in this field basically rely on the personal experience of different professional technicians. Therefore, it is urgent to establish a method for determining the lithology of source rocks that is less dependent on personal experience in this field.

Method used

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  • A Method for Determining the Lithology of Hydrocarbon Source Rocks
  • A Method for Determining the Lithology of Hydrocarbon Source Rocks
  • A Method for Determining the Lithology of Hydrocarbon Source Rocks

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Embodiment 1

[0035] This embodiment provides a method for determining the lithology of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0036] Extract bitumen samples from source rock samples:

[0037] Firstly, the powder of source rock sample A with Ro=2.3 was Soxhlet extracted for 24 hours with a mixture of chloroform and methanol (the volume ratio of the two was 98:2) to obtain an extraction solution.

[0038] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0039] Take 200 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane, then add dichloromethane to 1.5 mL and mix well for use.

[0040] The comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to identify and quantify the ethyl noradamantane compounds in asphalt.

[0041] According to the identification and quantitative analysis r...

Embodiment 2

[0046] This embodiment provides a method for determining the lithology of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0047] Extract bitumen samples from source rock samples:

[0048]First, the source rock sample B powder with Ro=4.3 was Soxhlet extracted for 24 hours with a mixture of chloroform and methanol (the volume ratio of the two was 97:2) to obtain an extraction solution.

[0049] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0050] Take 100 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane, then add dichloromethane to 1.5 mL and mix well for use.

[0051] The comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to identify and quantify the ethyl noradamantane compounds in asphalt.

[0052] According to the identification and quantitative analysis results...

Embodiment 3

[0055] This embodiment provides a method for determining the lithology of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0056] Extract bitumen samples from source rock samples:

[0057] First, the source rock sample C powder with Ro=2.0 was Soxhlet extracted for 24 hours with a mixture of chloroform and methanol (the volume ratio of the two was 98:2) to obtain an extraction solution.

[0058] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0059] Take 50 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane, then add dichloromethane to 1.5 mL and mix well for use.

[0060] The comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to identify and quantify the ethyl noradamantane compounds in asphalt.

[0061] According to the identification and quantitative analysis results...

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Abstract

The present invention provides a method for determining the lithology of hydrocarbon source rock, the method comprising: (1) using a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer to measure the ethyl reduction in the bitumen sample extracted from the source rock sample The adamantane compounds are identified and quantitatively analyzed; (2) according to the identification and quantitative analysis results obtained in step (1), the relative content of dimethylethylnoradamantane in the ethylnoradamantane compounds is obtained; (3) ) compare the relative content obtained in step (2) with the relative content of dimethylethylnoradamantane in ethylnoradamantane compounds in source rock samples of known lithology, and then according to the ratio The lithology of the target source rock is determined from the results. This method can be used to determine the lithology of unknown source rocks. This method is less dependent on personal experience and more accurate in judging the lithology of source rocks.

Description

technical field [0001] The invention relates to a method for determining the lithology of source rocks, in particular to a method for determining the lithology of source rocks by using ethyl noradamantane compounds. Background technique [0002] Hydrocarbon source rocks include oil source rocks, gas source rocks and oil and gas source rocks, and are usually called source rocks. French petroleum geologist Tissot (1978) defined source rocks as: "rocks that are rich in organic matter, generate and discharge oil and gas in large quantities". A source rock is a rock that can produce or has produced hydrocarbons. [0003] Conditions that source rocks should meet: contain a large amount of organic matter, namely kerogen, and reach the threshold temperature for kerogen to transform into oil and gas, that is, the burial depth (see: Yang Taotao, Fan Guozhang, Lv Fuliang, Wang Bin, Wu Jingwu, Lu Yintao, Hydrocarbon source rock survey Well response characteristics and identification a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N27/626G01N27/62
CPCG01N30/02G01N30/06G01N30/8679G01N27/62G01N2030/025
Inventor 朱光有王萌池林贤张志遥李婷婷杨海军陈志勇陈玮岩
Owner PETROCHINA CO LTD