Sandy deposited particle distinguishing method

A technology for sedimentary particles and sandy quality, applied in the field of sedimentology, it can solve the problems of poor reliability, narrow application range, and lack of quantitative differentiation of sedimentary environments, and achieves the effects of high accuracy, accurate judgment results, and wide application range.

Active Publication Date: 2016-06-08
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0019] In view of the above-mentioned problems, the purpose of the present invention is to overcome the problems of poor reliability, narrow application range and no quantitative distinction of sedimentary en

Method used

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Experimental program
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Embodiment

[0043] Example: such as Figure 1 to Figure 6 Shown, the present invention comprises the following steps:

[0044] Step 1. Sample collection and processing:

[0045] 1) Sample cleaning: first take about 500g of loose samples collected from the field (adjustable according to the needs of different researches), put them into a 1000ml beaker, soak and rinse with tap water, and remove the mud;

[0046] 2), sample drying: dry the remaining debris particles and pass through a 60-80 mesh sieve to obtain particles between 60-80 mesh;

[0047] 3) Pick out quartz particles: select colorless, transparent and greasy quartz particles through binoculars, mix them with 20% hydrochloric acid, soak them for 8 hours to remove carbonic acid, and then clean these quartz particles with tap water , then dry.

[0048] 4) Gold plating: Paste the last picked quartz particles on the sample stage with conductive glue, put them into the gold plating device, perform gold plating for about 5 minutes, and ...

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Abstract

The invention discloses a sandy deposited particle distinguishing method, and belongs to the technical field of sedimentology. The method comprises the following steps: collecting and processing a sample, analyzing surface roundness, disc shaped impact crater, crescent-shaped impact crater, shell like fracture, V shaped impact crater, and impact ditch of quartz particle through scanning electron microscope (SEM) images; utilizing a linear measurement method to count the surface characteristics of quartz particles, utilizing the ratio of quartz particles having impact ditches and disc shaped impact craters to all particles that linear lines go through in the linear measurement method to draw a distinguishing layout; and utilizing the ratio of quartz particles having crescent-shaped impact craters and V shaped impact craters to all particles that linear lines go through in the linear measurement method to draw a distinguishing layout. Compared with the technology of particle size analysis, the provided method has the advantages that the application range is wider, and there is no situation of multiple solutions or less situations of multiple solutions. Compared with the technology of bedding analysis, the provided method has the advantages that the particles can be researched in a microscopic level, the theoretical foundation is strong, and the judgment results are accurate.

Description

technical field [0001] The invention belongs to the technical field of sedimentology, and in particular relates to a method for distinguishing sandy sedimentary grains of hydraulic and aeolian origin. Background technique [0002] A depositional environment is an area with specific physical, chemical and biological conditions in which sediments (rocks) form. Sediments exhibit different characteristics in different depositional environments. Since the original driving force of eolian and wave sedimentary systems is wind, they often exist together in the coastal zone of oceans or lakes. In previous depositional environment determinations, it was difficult to distinguish the two. For oil and gas exploration, if the Langcheng beach-bar reservoir can be identified from the two, it will have great guiding significance for the current oil and gas exploration. [0003] The existing methods for distinguishing sandy sedimentary grains of hydraulic and eolian origin are as follows: ...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N21/84
Inventor 张元福白一鸣胡晨林姜在兴王敏
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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