A method for tracing the source of a blockage located at a high position in a crude oil distillation unit

Abstract

The present invention discloses a method for tracing the source of a blockage located at a high position of a crude oil distillation unit, comprising the following steps: Step 1, collecting blockages located at a high position of a vacuum side line of a crude oil distillation unit, and then pre-treating the blockages; Step 2, testing and analyzing the blockages pre-treated in Step 1, analyzing the elemental composition and physical properties of the blockages, and determining the group structure contained in the blockages; Step 3, selecting suitable oilfield chemicals; Step 4, treating crude oil with reference to formation conditions and gathering and transportation conditions; Step 5, simulating the crude oil processing process; Step 6: vacuum side line fraction analysis; Step 7: vacuum distillate oilfield chemical enrichment and detection analysis. The present invention has the following advantages: 1. It can clearly determine which oilfield chemical remains in the crude oil and causes the high-position blockage of the vacuum side line of the distillation unit; 2. It ensures the normal operation and product quality of crude oil processing enterprises, reduces the economic losses of processing enterprises, and eliminates safety hazards.

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