Quantitative analysis method for volatile components in liquid products of thermal-simulation hydrocarbon generation experiment

Abstract

The invention provides a quantitative analysis method for volatile components in liquid products of a thermal-simulation hydrocarbon generation experiment. The quantitative analysis method comprises the following steps of collecting and treating the liquid products of the thermal-simulation hydrocarbon generation experiment, specifically, collecting, removing water, removing slag and injecting a standard sample; quantitatively analyzing the volatile components in the liquid products of the thermal-simulation hydrocarbon generation experiment through a comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector, specifically, carrying out primary comprehensive two-dimensional analysis, volatilizing to reach constant weight and secondary comprehensive two-dimensional analysis; calculating a quantification result of the volatile components in the liquid products of the thermal-simulation hydrocarbon generation experiment. The quantification result of the volatile components in the liquid products of the thermal-simulation hydrocarbon generation experiment, which is obtained by the quantitative analysis method disclosed by the invention, is real, reliable and high in repetitiveness, so that a reliable technical support is supplied to evaluation of an oil-gas resource amount.

Description

technical field [0001] The invention relates to a quantitative analysis method for volatile components in liquid products of thermal simulation hydrocarbon generation experiments, and belongs to the technical field of oil and gas geochemistry. Background technique [0002] The thermal simulation experiment of hydrocarbon generation is one of the important experimental means used by oil and gas geochemists to explore the mechanism of oil and gas generation and reproduce the oil generation process. The experiment is mainly based on the principle of kerogen thermal degradation into hydrocarbons and the time-temperature compensation principle of organic matter thermal evolution. In the laboratory, immature or low-mature organic matter is used to simulate pyrolysis and hydrocarbon generation in a short period of time under high temperature and pressure conditions to reproduce Low-temperature and long-term thermal evolution of organic matter in geological processes. The product o...

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Problems solved by technology

However, this method has high requirements on the experimental environment and operators. The volatile components are seriously lost during the oil-water separation process and the constant weight process. A small amount of water mixed with light hydrocarbons or a small amount of light hydrocarbons left in the water will cause great results. error, and the repeatability of the experimental results is poor

Use low boiling point organic solvents (such as dichloromethane) to collect oil-water mixtures, which can avoid the loss of volatile components during the oil-water separation process, but the presence of solvents makes the weighing method unsuitable

Traditional gas chromatography (GC-FID) can be used to analyze volatile components, but due to the small capacity and poor separation ability of the chromatographic column, the peak overlap phenomenon on the chromatogram is serious, and there are varying degrees of interference on the standard peak. Directly Affect Quantitative Results

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