Method for determining content of biological silicon in sedimentary rock

A technology of sedimentary rock and bio-silicon, which is applied in the field of petroleum geology research, can solve problems such as difficulty in extraction, and achieve the effect of reducing measurement errors

Pending Publication Date: 2020-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current methods for determining biosilicon are mainly for marine or lake sediments, which have not undergone diagenetic evolution and are relatively easy to extract, while sedimentary rocks have undergone a long period of sedimentary diagenesis and stratigraphic evolution, and contain a large amount of siliceous c

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  • Method for determining content of biological silicon in sedimentary rock
  • Method for determining content of biological silicon in sedimentary rock
  • Method for determining content of biological silicon in sedimentary rock

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0040] Example 1

[0041] This embodiment provides a method for determining the biosilicon content of the low-evolution sample NJ-1 and the measurement result.

[0042] 1. Sample grinding

[0043] Use a plastic brush to remove the attachments on the surface of the sedimentary rock NJ-1, clean the agate grinding bowl with water and alcohol, put a small piece of NJ-1 sample, and manually grind it to a particle size of ≤200 mesh.

[0044] 2. Put the ground sample into a sample bottle, dry it at 60°C for 24 hours, take it out and store it in a desiccator.

[0045] 3. Weigh 75 mg of the sample into a 50 mL polyethylene centrifuge tube, add 5 mL of 1 mol / L hydrochloric acid solution in the centrifuge tube, and let it stand for 2 hours until the reaction is complete to remove carbonates. After the reaction is complete, add 20 mL of water, centrifuge at 3000 rpm in a centrifuge for 5 min, and remove the supernatant.

[0046] 4. Add 5 mL of 10% hydrogen peroxide solution and let it stand overnig...

Example Embodiment

[0057] Example 2

[0058] This embodiment provides a method for determining the bio-silicon content of the highly evolved sample YJC-0 and the measurement result. The measurement method is the same as that of Example 1.

[0059] Table 2 shows the extraction experiment results of the high-evolution sample YJC-0. From Table 2, it can be seen that the content of Si, Al, and Ti in the extract is relatively low, and the content of Al is 10%-25% of the Si content, which means Non-biological silicon or silica derived from clay minerals is relatively high and must be corrected for non-biological silicon. figure 2 It shows the relationship between Si and Al concentration changes in the YJC-0 sample extract in Example 2 of the present invention. From figure 2 It is found that the content of Si and Al in the extract is close to 1:1. From this, it can be inferred that the ratio of non-biological silicon to Al in the sample is 1:1, and the bio-silicon data can be corrected by this coefficient...

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Abstract

The invention discloses a method for determining the content of biological silicon in sedimentary rock. The method comprises the following steps: 1) cleaning, grinding and drying sedimentary rock; 2)removing carbonates; 3) removing organic matters; 4) extracting to obtain an extracting solution; 5) performing sampling; and 6) determining the mass fraction of biological silicon. According to the method, an internal standard method is adopted for correcting the influence of the matrix effect (high-content sodium) on silicon, aluminum and titanium measurement, measurement errors are reduced, thecontent of aluminum and titanium can be used for correcting and deducting positive non-biological silicon, and the method can meet the requirement for measuring the content of biological silicon in sedimentary rock in oil and gas exploration.

Description

technical field [0001] The invention belongs to the field of petroleum geology research, and more specifically relates to a method for measuring the content of bio-silicon in sedimentary rocks, which meets the needs of measuring the content of bio-silicon in sedimentary rocks in oil and gas exploration. Background technique [0002] Silicon is abundant in the earth's crust, second only to oxygen, accounting for about 27.7%. However, silicon in nature exists in a combined state (Aston, 1983: (1) dissolved silica (DSi: dissolved silica), which is mainly HSiO silicic acid 4 form exists. (2) Silicon dioxide (silica), which mainly includes quartz (quartz) glass and opal (opal or opaline silica), etc.; (3) Silicate is the main form of silicon, such as olivine, feldspar, mica and clay minerals etc. In aquatic ecosystems, silicon is an important element that constitutes biological communities. The growth and skeleton formation of radiolarians, siliceous sponges and dinoflagellate...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
CPCG01N21/73G01N1/28
Inventor 马亮帮腾格尔卢龙飞申宝剑陈强路
Owner CHINA PETROLEUM & CHEM CORP
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