Extraction method of organic sulfur in carbonate rock with low organic matter content
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A technology of organic matter content and carbonate rock, which is applied in the extraction of organic sulfur in carbonate rock and the field of organic sulfur extraction, can solve the problems of inaccurate measurement of organic sulfur content and isotopic composition, and achieves high accuracy and simple operation. , the effect of high extraction efficiency
Active Publication Date: 2019-03-12
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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[0005] The invention provides a method for extracting organic sulfur in carbonate rocks with low organic matter content. The method is simple to operate, can eliminate the influence of non-organic sulfur in carbonate rock samples on the extraction of organic sulfur, and improves the efficiency and efficiency of organic sulfur extraction. Accuracy, thus effectively solving the problem that the organic sulfur content and isotope composition of carbonate rock formation samples cannot be accurately measured, and providing a more powerful tool for the restoration of paleo-marine environments and the evaluation of oil and gas resources during the depositional period of carbonate rock formations. evidence of
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[0086] 1. Acid treatment
[0087] Step a: Weigh 300g of the carbonate rock sample powder ground to 200 mesh, pour the carbonate rock sample powder into 600ml of hydrochloric acid with a concentration of 6N while stirring, and react at 60°C for 2h to form The first acid treats the carbonate rock sample. When the reaction is over, discard the acid solution.
[0088] Step b: While stirring, pour 800ml of 6N hydrochloric acid into the carbonate rock sample treated with the first acid, and react at 60° C. for 2 hours to generate a second acid-treated residual sample. After the reaction, the acid solution was poured off, and the remaining solid sample was washed with distilled water until it was weakly acidic, that is, the pH was 5-7.
[0089] Step c: While stirring, pour the mixture of hydrochloric acid and hydrofluoric acid with a total volume of 700ml into the second acid-treated residue, and react at 60°C for 2h to generate the third acid-treated residue. And in the mixture, ...
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Abstract
The invention provides an extraction method of organic sulphur in carbonate rocks with low organic matter content. The extraction method comprises the following steps: 1) performing acid treatment oncarbonate rock samples to obtain acid treatment residual samples; 2) performing separation treatment on the acid treatment residual samples by using heavy fluid to obtain a first organic matter product; 3) performing pyrite removal treatment on the first organic matter product to obtain a second organic matter product; 4) dissolving the second organic matter product to obtain a targeted solution,and converting the organic sulphur in the targeted solution into precipitants, wherein a sulphur element in the precipitants is the organic sulphur in the carbonate rock samples. The method is easy tooperate, can eliminate an influence of non-organic sulphur in the carbonate rock samples on extraction of the organic sulphur, and can improve the purity of extracted organic sulphur.
Description
technical field [0001] The invention relates to an organic sulfur extraction technology, in particular to a method for extracting organic sulfur in carbonate rocks with low organic matter content, and belongs to the technical field of oil and gas geochemistry. Background technique [0002] Carbonate rocks refer to rocks mainly composed of deposited carbonate minerals (calcite, dolomite), among which, the content of carbonate minerals is greater than 50%, and the minerals that coexist with carbonate rocks include iron, aluminum, manganese, Phosphorus, sulfur, gypsum, anhydrite, potassium salt, etc. The strata-bound deposits produced in carbonate rocks include copper, lead, zinc, mercury, antimony, arsenic, uranium and other metal minerals, as well as celestite and barite , Fluorite, crystal, iceland stone and other non-metallic minerals. [0003] Carbonate rock oil and gas resources occupy an important position in the distribution of oil and gas resources in the world. Its o...
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/34
CPCG01N1/286G01N1/34G01N2001/2866
Inventor 许辰璐蔡春芳李开开汪天凯李红霞李廷微赵龙扈永杰余浩元刘大为
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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