Sample treatment method for in-situ micro-area combination analysis

A combined analysis and sample processing technology, applied in the field of sample processing, oil and gas research, can solve the problems of high cost

Active Publication Date: 2017-12-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that it needs to modify the instrument, which is costly, and the types of in situ micro-area analysis are limited to transmission electron microscope and scanning probe microscope.
At present, there is no sample pretreatment method for the combination of va

Method used

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  • Sample treatment method for in-situ micro-area combination analysis
  • Sample treatment method for in-situ micro-area combination analysis
  • Sample treatment method for in-situ micro-area combination analysis

Examples

Experimental program
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Embodiment 1

[0029] Cross-section the hand specimen samples in the assemblage carbonate reservoirs in the Sichuan Basin, and the cross-section I samples are polished and made into 50*25mm 2 About the size, 0.03-0.06mm thick rock flakes. Use cathodoluminescence instrument for microscopic observation to determine the type and stage of diagenesis microscopically, and at the same time accurately locate the interested parts and mark the stages of cement ①-⑤, and use a 0.5mm diameter dental drill for these locations Sampling 50ug respectively, and doing carbon and oxygen isotope analysis, the analysis results are as follows image 3 shown. Among them, ① is the matrix, and the isotope analysis results are as follows: δ 13 C=4.17375, δ 18 O=-5.456875; ② is the first phase of dolomite cement, δ 13 C=3.74475, δ 18 O=-3.768875; ③ is the second phase of dolomite cement, δ 13 C=3.45475, δ 18 O=-3.446875; ④ is the third phase of dolomite cement, δ 13 C=2.92375, δ 18 O=-3.429875; ⑤ is the dolomi...

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Abstract

The invention provides a sample treatment method for combining multiple in-situ micro-area test analysis. The sample treatment method mainly comprises three steps such as sample collection, target positioning, and sample preparation. According to the present invention, by macroscopically and microscopically observing and positioning the target area, and reasonably setting and coordinating the sample treatment process and the method, the in-situ micro-area test analysis in the structure, the component, the isotope and other fields are performed on the same part of the same sample to the greatest extent, the destructive and non-destructive in-situ micro-area analysis methods of a variety of samples are combined, and the possibility is provided for the fine description and analysis of the reservoir.

Description

technical field [0001] The invention belongs to the field of geological and mineral general survey and exploration industry, as well as the field of petroleum and natural gas research, and mainly relates to the technology in the field of sample processing. Background technique [0002] In this research field, the commonly used in situ micro-analysis methods include laser Raman spectroscopy, laser plasma mass spectrometry (LA-ICP-MS), secondary ion probe mass spectrometry (SIMS), electron probe (EMPA ) and scanning electron microscopy (SEM). Each in situ microanalysis method can be used alone to obtain the composition, structure, isotopic composition and other information in the fine area of ​​the sample, and multiple in situ microanalysis methods can be used in combination to perform multiple in situ microanalysis methods on the same part of the same sample. Micro-area test analysis greatly improves the dimension and precision of analysis, and greatly promotes the fine rese...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N33/24
CPCG01N1/2806G01N1/286G01N33/24
Inventor 冯菊芳田海芹朱东亚李双建林娟华朱虹孙炜张荣强袁玉松李天义
Owner CHINA PETROLEUM & CHEM CORP
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