A Classification Method of Complex Crude Oil

Abstract

The invention provides a method for classifying complex crude oil, which belongs to the technical field of petroleum geology. The method can quickly and efficiently classify complex crude oil, and the classification result is accurate and reliable. The method includes the following steps: collecting crude oil samples in the research area, removing solid impurities and water in the crude oil samples; performing nuclear magnetic resonance detection on the pretreated crude oil samples, obtaining carbon and hydrogen spectra, and screening out the Functional group: Taking the proportion of the corresponding peak area of ​​the above-screened functional group in the carbon spectrum and hydrogen spectrum as a variable, the K-means clustering algorithm is used for cluster analysis to obtain the classification result.

Description

Technical field [0001] The invention belongs to the technical field of petroleum geology, and particularly relates to a classification method of complex crude oil. Background technique [0002] Oil and gas source analysis is a basic content of petroleum geology and geochemistry research. The first step is to classify the crude oil in the study area. When the crude oil in the study area comes from a single oil source or an oil source with a low degree of degradation, it can be classified by organic geochemical analysis methods, such as gas chromatography-mass spectrometry and fluorescence analysis techniques. However, as the current global oil and gas exploration continues to increase, the geochemical effects such as mixing, degradation, and thermal evolution during the process of oil and gas filling and accumulation have become more and more common. Faced with severe biodegradation and other secondary alterations and In the case of multi-source charging of crude oil, the paramet...

AI Technical Summary

Problems solved by technology

However, with the increasing degree of global oil and gas exploration, geochemical processes such as mixing, degradation, and thermal evolution in the process of oil and gas charging and accumulation are becoming more and more common. When multiple sources of crude oil are charged, there are uncertainties in the parameters required for crude oil classification using gas chromatography-mass spectrometry, and the biomarkers required for crude oil classification using fluorescence analysis technology are severely damaged, which limits Application of these techniques in complex crude oil classification

At present, the classification of complex crude oils such as mixed crude oil and degraded crude oil is usually simply based on the physical and chemical characteristics of crude oil and characteristic biomarker compounds. And the lack of characteristic biomarker compounds of crude oil at high evolution degree, these objective and complex conditions greatly limit the classification of complex crude oil types, which is not conducive to subsequent oil source identification

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