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Mineral standard sample used for nanometer CT, and preparation method and application thereof

A standard sample and mineral technology, applied in the preparation of test samples, material analysis using radiation, etc., can solve the problems of rock mineral complexity, mineral identification, and no method of nano-CT rock mineral identification, so as to avoid multiple times Effect of CT calibration and efficiency improvement

Active Publication Date: 2015-11-18
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

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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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  • Mineral standard sample used for nanometer CT, and preparation method and application thereof
  • Mineral standard sample used for nanometer CT, and preparation method and application thereof
  • Mineral standard sample used for nanometer CT, and preparation method and application thereof

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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] First of all, the selected four standard mineral particles were mechanically cut, surface polished (metallographic polishing), cleaned and dried to obtain a mineral sample sheet with a diameter of 2 cm and a thickness of 2 cm, and the sample was glued to the A- 532-DWDoubleWorkstationSamplePreparationSystems laser micromachining system sample stage;

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

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Abstract

The invention provides a mineral standard sample used for nanometer CT, and a preparation method and an application thereof. The preparation method of the mineral standard sample comprises the following steps: selecting standard mineral particles according to the mineral composition of a rock to be measured; respectively processing at least one of the selected standard mineral particles to form mineral sample discs; and welding one of the mineral sample discs to a pedestal, and stacking and welding all the mineral sample discs to form the mineral standard sample. When the mineral standard sample is used in mineral analysis, mineral identification is carried out by using the gray scale information of the standard mineral sample and a rock sample to make unknown mineral particles in the rock sample identified and calibrated, so the three dimensional distribution, the volume proportions and the mineral particle dimension distribution of corresponding mineral components in the rock sample are obtained. The method effectively fills up the gap in preparation methods of like standard samples, and meets urgent demands of microscopic three dimensional mineral analysis in the petroleum geology field.

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 Applications(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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