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A Method for Determining the Maturity of Hydrocarbon Source Rocks

A source rock and maturity technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low dependence on personal experience 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] At present, in this field, indicators such as organic matter abundance, organic matter type, and organic matter maturity are mostly used to evaluate source rocks. Among them, organic matter maturity of source rocks is the most commonly used index, so determining the maturity of source rocks is the basis of oil and gas exploration However, the existing methods for determining the maturity of source rocks in this field basically rely on the personal experience of different professional technicians to judge. Due to the complexity and variability of source rock maturity, it is necessary to determine the hydrocarbon The maturity of source rocks often leads to inaccurate judgments. Therefore, it is urgent to establish a method for determining the maturity of source rocks that is less dependent on personal experience.

Method used

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

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Experimental program
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Embodiment 1

[0034] This embodiment provides a method for determining the maturity of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0035] Extraction of bitumen samples from mudstone source rock samples:

[0036] First, the powder of source rock sample A was Soxhlet-extracted for 24 hours with a mixture of chloroform and methanol (98:2 by volume) to obtain an extraction solution.

[0037] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0038] Take 200 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane to the asphalt sample, then add dichloromethane to 1.5 mL, mix well and set aside.

[0039] A comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to detect the mixture obtained after the above-mentioned homogeneous mixing, so as to identify and quantitatively analyze the ethyl noradam...

Embodiment 2

[0049] This embodiment provides a method for determining the maturity of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0050] Extraction of bitumen samples from mudstone source rock samples:

[0051] First, the powder of source rock sample B was Soxhlet-extracted for 24 hours with a mixture of chloroform and methanol (97:2 by volume) to obtain an extraction solution.

[0052] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0053] Take 100 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane to the asphalt sample, then add dichloromethane to 1.5 mL, mix well and set aside.

[0054] A comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to detect the mixture obtained after the above-mentioned homogeneous mixing, so as to identify and quantitatively analyze the ethyl noradam...

Embodiment 3

[0060] This embodiment provides a method for determining the maturity of source rocks using ethyl noradamantane compounds, wherein the method includes the following steps:

[0061] Extraction of bitumen samples from mudstone source rock samples:

[0062] Firstly, the powder of the source rock sample C was extracted by Soxhlet for 24 hours with a mixture of chloroform and methanol (98:2 by volume) to obtain an extraction solution.

[0063] After carefully evaporating the organic solvent in the extraction solution under nitrogen flow, a source rock bitumen sample was obtained.

[0064] Take 50 mg of asphalt sample, add 40 μL of 0.5 μg / μL d16-adamantane to the asphalt sample, then add dichloromethane to 1.5 mL, mix well and set aside.

[0065] A comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOF MS) was used to detect the mixture obtained after the above-mentioned homogeneous mixing, so as to identify and quantitatively analyze the ethyl...

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Abstract

The present invention provides a method for determining the maturity of source rocks, wherein the method comprises: (1) using a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer to analyze the B in bitumen samples extracted from source rock samples (2) According to the identification and quantitative analysis results obtained in step (1), obtain the relative content of the ethyl noradamantane substituted by ethyl in the ethyl noradamantane compound (3) The relative content obtained in the step (2) is compared with the relative content of the ethyl noradamantane that is substituted by ethyl in the ethyl noradamantane compound in the source rock sample of known maturity , to determine the maturity of the target source rock. This method can be used to quantitatively determine the maturity of source rocks, which is less dependent on personal experience and more accurate in judging the maturity of source rocks.

Description

technical field [0001] The invention relates to a method for determining the maturity of source rocks, in particular to a method for determining the maturity 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) and others defined source rocks as: "rocks rich in organic matter, producing and expelling 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N27/62
CPCG01N30/02G01N30/06G01N30/8679G01N27/62G01N2030/025
Inventor 王萌池林贤朱光有张志遥李婷婷杨海军韩剑发孙崇浩陈玮岩
Owner PETROCHINA CO LTD