Device and method for detecting microbial metabolized gas during microbial flooding

Abstract

The invention provides a device and a method for detecting microbial metabolism gas in a microbial oil displacement process. The device comprises a Raman spectrometer used for detecting the microbial metabolism gas in the microbial oil displacement process, a temperature control box located under the Raman spectrometer and used for providing temperature of microbial oil displacement, a quartz capillary tube located in the temperature control box and used for simulating rock with different pore diameters, an injection system connected to the quartz capillary tube and used for injecting water, petroleum, microbes and nutrient liquid into the quartz capillary tube, and an extraction system connected to the quartz capillary tube and used for collecting extraction liquid, the petroleum and the gas in the quartz capillary tube. According to the embodiment of the invention, the type and the content of the metabolism gas can be determined by detecting a Raman shift of the microbial metabolism gas in the microbial oil displacement process through the Raman spectrometer; the problem that the microbial metabolism gas cannot be effectively detected in situ in the prior art can be solved; the purpose of qualitatively and quantitatively detecting the microbial metabolism gas can be achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a device and method for detecting microbial metabolized gas in the process of microbial oil displacement. Background technique [0002] For a long time, the detection of microbial metabolized gas in the process of microbial flooding under simulated reservoir temperature and pressure conditions has been puzzling researchers. Especially in the complex environment of simulating the coexistence of oil, water and rock, the determination of the types and contents of microbial metabolic gases are subject to certain restrictions. [0003] At present, the qualitative and quantitative in-situ detection of microbial metabolic gases is generally achieved by chromatography or based on intuitive pressure changes. Among them, when using chromatography to detect microbial metabolic gases, the detection results have a certain time lag, and errors are prone to occur in the process o...

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Problems solved by technology

[0005] The embodiment of the present invention provides a device and method for detecting microbial metabolized gas in the process of microbial oil flooding, so as to solve the problem that the microbial metabolized gas cannot be effectively detected in the prior art

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