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Step-by-step grading sampling method suitable for carbonatite sample

A carbonate rock and sample technology, applied in the field of geological exploration, to avoid physical and chemical pollution and improve reliability

Active Publication Date: 2013-09-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

In view of the fact that conventional processing methods are not suitable for selecting carbonate rock minerals from carbonate rocks, it is urgent to invent a new sampling method

Method used

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  • Step-by-step grading sampling method suitable for carbonatite sample

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Embodiment

[0034] In the sample collection step, the dolomite samples containing the target mineral as dolomite are collected, and the samples are roughly crushed by means of mechanical crushing using a geological hammer. Blocks, including larger-sized ore-bearing crushed samples, target minerals, and fine powders that cannot be distinguished from surrounding rocks and target minerals after crushing, after sieving to obtain powder-free ore-bearing crushed samples, select the target minerals under binoculars , can get target minerals and ore-bearing crushed samples. So far, the sample coarse crushing step is completed.

[0035] Use a geological hammer to mechanically crush the ore-bearing crushed samples at the above coarse crushing stage to obtain 0.2-0.5 cm ore-bearing crushed samples, and then sieve and separate the ore-bearing crushed samples to obtain target minerals and ore-bearing crushed samples. Combine the target minerals obtained in the fine crushing stage of the sample and th...

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Abstract

The invention discloses a step-by-step grading sampling method suitable for a carbonatite sample. The step-by-step grading sampling method comprises the steps of: sample collecting, sample coarse crushing, sample fine crushing and sample selecting, wherein the sample coarse crushing is realized as follows: a target mineral is completely separated from surrounding rock by adopting a mechanical crushing method, and meanwhile a crushed sample containing the target mineral is obtained; and the sample fine crushing is realized as follows: the crushed sample containing the target mineral, obtained from the sample coarse crushing, is further crushed by adopting a mechanical crushing method to obtain the target mineral and the crushed sample containing the target mineral, and the acting point of the mechanical crushing is in the carbonatite surrounding rock. According to the step-by-step grading sampling method, the target mineral can be accurately selected without changing the chemical components of the target mineral and causing the pollution of other minerals, the reliability of analysis testing on the aspects of elementary composition, isotope composition and the like is improved, and the foundation is further laid for the research of a carbonatite reservoir.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a step-by-step classification sample selection method suitable for carbonate rock samples. Background technique [0002] In my country, large oil and gas fields have been discovered in Paleozoic carbonate strata in Sichuan, Tarim, Ordos and other basins. The research on the development and formation environment of carbonate rock reservoirs and the subsequent fluid transformation can be used to guide oil and gas exploration in carbonate rocks. Carbonate minerals such as calcite and dolomite in the form of cement or veins can often be seen in carbonate rocks. The study of the origin of these minerals is of great significance to the study of the formation and development of carbonate reservoirs and the subsequent fluid reformation. [0003] The research and solution of the above-mentioned geological problems are based on precise geochemical analysis and isotope testing. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04G01N1/28
Inventor 金之钧朱东亚孙冬胜周雁孟庆强
Owner CHINA PETROLEUM & CHEM CORP
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