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A kind of mineral standard sample for nano CT and its preparation method and application

A standard sample and mineral technology, applied in the preparation of test samples, material analysis using radiation, etc., can solve the problems of identifying minerals, the complexity of rock minerals, and the lack of methods for nano-CT rock mineral identification, etc., to improve efficiency, Avoid the effects of multiple CT calibrations

Active Publication Date: 2017-09-01
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

The reason is that people cannot identify minerals only by using the grayscale information provided by nano-CT. The information provided by nano-CT is insufficient, coupled with the complexity of the composition of different types of rock minerals, there is currently no method for nano-CT rock mineral identification.

Method used

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  • A kind of mineral standard sample for nano CT and its preparation method and application
  • A kind of mineral standard sample for nano CT and its preparation method and application
  • A kind of mineral standard sample for nano CT and its preparation method and application

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Embodiment 1

[0048] The present embodiment provides a mineral standard sample of nano-CT, which is prepared through the following steps (the specific process is as follows: figure 1 shown):

[0049] (1) Select standard mineral particles according to the mineral composition of the rock to be tested

[0050] Firstly, the four minerals with the most content in the tight carbonate rock sample are calcite, albite, potassium feldspar and dolomite, and the corresponding standard mineral particles are selected;

[0051] (2) Make standard mineral particles into mineral sample discs

[0052] Firstly, the selected four standard mineral particles were mechanically cut, surface polished (metallographic polishing method), cleaned and dried to obtain a mineral sample piece with a diameter of 2 cm and a thickness of 2 cm, and the sample was glued to the A -532-DW Double Workstation Sample Preparation Systems laser micromachining system sample stage;

[0053] Secondly, use a laser micromachining system ...

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Abstract

The invention provides a mineral standard sample for nanometer CT, its preparation method and application. The method of the mineral standard sample comprises the following steps: selecting standard mineral particles according to the mineral composition of the rock to be tested; processing the selected at least one standard mineral particle into a mineral sample disc; welding one of the mineral sample discs on the base Each mineral sample disc is stacked and welded, and the columnar sample formed is the mineral standard sample. When the above-mentioned mineral standard samples are used for mineral analysis, the gray scale information of the standard mineral samples and rock samples is used for mineral identification, so that the unknown mineral particles in the rock samples can be identified and calibrated, and then the three-dimensional information of the corresponding mineral components in the rock samples can be obtained. distribution, volume ratio occupied, and mineral particle size distribution. The method provided by the invention effectively fills the vacancy of such standard sample preparation methods, and meets the urgent demand for microscopic three-dimensional mineral analysis in the field of petroleum geology.

Description

technical field [0001] The invention belongs to the field of mineral analysis, and in particular relates to a mineral standard sample used in nano-CT and its preparation method and application. Background technique [0002] In recent years, nano-CT imaging technology has become an important technology for tight reservoir research due to its advantages of high resolution and non-destructive imaging, and has been widely used in shale, tight sandstone, and tight carbonate rock. Study the internal pore structure, pore connectivity, pore volume and pore size distribution of rocks. In recent years, with the deepening of research, the study of rock mineral composition, mineral composition not only has an important impact on the migration and accumulation of fluid in pores, thus affecting the storage and migration of oil and gas; in addition, it also determines the response to sound waves, Therefore, carrying out research in this area can also provide a theoretical basis for resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N23/04
Inventor 王晓琦金旭朱如凯吴松涛李建明刘晓丹孙亮
Owner PETROCHINA CO LTD
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