Puncture device of gold pipe and collection device of trace hydrogen sulfide generated by thermal simulation in gold pipe

Abstract

The invention discloses a puncture device of a gold pipe and a collection device of trace hydrogen sulfide generated by thermal simulation in the gold pipe, which comprise a sealed gold pipe which is horizontally arranged and can be put into a petroleum sample. The puncture device of the gold pipe and the collection device of the trace hydrogen sulfide generated by thermal simulation in the gold pipe are characterized by also comprising a flow rate adjusting valve, a flowmeter and a carrier gas preheating chamber which are sequentially connected in series, wherein the flow rate adjusting valve is connected into a carrier gas source, both ends of the gold pipe are respectively provided with a first casing and a second casing, the first casing and the second casing are sealed with the outside of the gold pipe, an air inlet and an air outlet are respectively arranged on the first casing and the second casing, the air inlet is connected with the carrier gas preheating chamber, the air outlet is connected with a container filled with a reaction solution, puncture needles which can puncture the gold pipe are respectively arranged on the first casing and the second casing, and airflow passages which are connected with the air inlet, the air outlet and puncture holes are respectively arranged in the first casing and the second casing. The invention can bring out hydrogen sulfide quickly and thoroughly, and the recovery rate of the hydrogen sulfide reaches 98%; the experiment speed is high, and a sample of the gold pipe can be processed within about 5 minutes; and liquid nitrogen is not needed, the cost is saved, and the use method is simple.

Description

technical field [0001] The invention relates to a collection device for studying the amount of hydrogen sulphide formed in a petroleum sample. Background technique [0002] Hydrogen sulfide is a harmful and dangerous gas in natural gas exploration. Therefore, in oil and gas geochemical research, it is necessary to use thermal simulation methods to study the amount of hydrogen sulfide generated by rocks. One of the methods is to encapsulate sulfur-containing geological samples in gold tubes, and study the amount of hydrogen sulfide generated after heating for a period of time, because the isotope analysis of sulfur in hydrogen sulfide needs to be converted into silver sulfide . Its reaction equation is as follows: [0003] h 2 S+AcCd→H 2 Ac+CdS↓; [0004] CdS+Ag 2 NO 3 → Ag 2 S↓+CdNO 3 . [0005] At present, for the hydrogen sulfide in a sufficient amount of gas samples (for example, the industrial gas flow at the wellhead of a natural gas drilling well), the method...

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Problems solved by technology

[0005] At present, for the hydrogen sulfide in a sufficient amount of gas samples (for example, the industrial gas flow at the wellhead of a natural gas drilling well), the method of blowing hydrogen sulfide gas into the cadmium acetate solution with a carrier gas such as nitrogen is adopted, but for the trace amount of hydrogen sulfide in the gold tube There is still a lack of effective collection and quantification methods for gas. Foreign countries use needles to puncture gold tubes, allowing hydrogen sulfide to diffuse naturally into vacuumed glass tubes, and then freeze and collect them with liquid nitrogen.

Because the punctured pores on the gold tube are very small, and hydrogen sulfide is mostly absorbed by petroleum samples, so the diffusion speed is very slow and the collection effect is not good.

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