Method for identifying oil-gas-water layer by utilizing shapes and content of unidentified compounds of thermal evaporation hydrocarbon components

Abstract

The invention relates to a method for identifying an oil-gas-water layer by utilizing shapes and content of unidentified compounds of a thermal evaporation hydrocarbon component. The method is characterized by comprising the following steps: 1), separating thermal evaporation hydrocarbon component diagrams according to n-alkane and the unidentified compounds; 2) observing a spectrogram of separated unidentified compound component peaks and researching shapes of the unidentified compound component peaks; identifying different fluid property layers and distinguishing the oil-gas-water layer by utilizing fine changes in the spectrogram; 3) calculating a total peak area of the n-alkane and the unidentified compound component peaks, and selecting two parameters in six parameters including an identified peak area, an unidentified peak area, a total peak area, a ratio of the identified peak area to the total peak area, a ratio of the unidentified peak area to the total peak area and a ratio of the identified peak area to the unidentified peak area as transverse and longitudinal coordinates to draw a thermal evaporation hydrocarbon interpretation chart. By adopting the method provided by the invention, the problems of an existing thermal evaporation gas-phase chromatography technology that an oil layer cannot be accurately distinguished from the component diagram and oil and water exist on the same layer are radically solved and the classification effect is good.

Description

technical field [0001] The invention relates to a method for identifying oil and gas water layers, in particular to a method for identifying oil and gas water layers by utilizing the form and content of unidentified compounds of thermally evaporated hydrocarbon components. Background technique [0002] Thermal evaporation gas chromatography technology is a logging method that uses the detection of hydrocarbon components in rocks. Because this technology has the ability to separate the hydrocarbon mixture in rocks into individual components, it can identify and eliminate pollution in reservoir crude oil properties. Interference and evaluation of oil, gas and water layers have played an important role, providing effective technical means for oilfield exploration and development. However, due to the similar shape of the thermal evaporation component diagrams of the oil layer and the oil-water layer, it is difficult to distinguish the oil layer and the oil-water layer, see figu...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a more reasonable and effective method for identifying oil and gas water layers by utilizing the unidentified compound form and content of thermal evaporation hydrocarbon components, and fundamentally solve the problem that the existing thermal evaporation gas chromatography technology cannot analyze the components from the component spectrum. The problem of accurately distinguishing oil layers and oil-water layers in the medium, the classification effect is good

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