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Method for determining lithology of source rock

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, and achieve accurate judgment and low dependence on personal experience Effect

Active Publication Date: 2019-11-05
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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  • Method for determining lithology of source rock
  • Method for determining lithology of source rock
  • Method for determining lithology of source rock

Examples

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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 invention provides a method for determining lithology of a source rock. The method comprises steps that (1) by using a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer, ethyl drop adamantane compounds in an asphalt sample extracted from a source rock sample can be inspected and analyzed in a quantitative manner; (2) according to the results of the inspection and the quantitative analysis in the step (2), relative content of dimethyl ethyl drop adamantine in the ethyl drop adamantane compounds can be acquired; (3) the relative content acquired in the step (2) is compared with the relative content of the dimethyl ethyl drop adamantine in the ethyl drop adamantane compounds in the source rock sample having the known lithology, and then according to the comparison result, the lithology of the target source rock can be determined. By using the method, the lithology of the unknown source rock can be determined, and the method has low dependence on personal experience and is accurate in the determining of the lithology of the source rock.

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 Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N27/62
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
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