RESEARCH ON AN ONLINE TESTING METHOD FOR CRUDE OIL POUR POINT BASED ON HANGING PLATE METHOD

Abstract

Abstract: Pour point is a critical engineering indicator for evaluating the low-temperature fluidity of crude oil, but according to the national standard test method for pour point, it is difficult to achieve online measurement in pipelines. In this study, static cooling experiments was conducted using a rheometer, revealing that volume contraction during cooling and gel structure formation induce a significant downward axial force on the rotor near the pour point. Based on this, a novel hanging plate method was developed, which is expected to enable accurate online measurement of crude oil pour points. Experimental results demonstrate that the number and size of paddle blades on the hanging plate only affect the magnitude of tension variation but have no significant impact on the pour point determination. The method exhibits excellent repeatability, applies to typical paraffinic and intermediate-base crude oils, and aligns well with existing standardized methods. It enables remote testing of pour points for pipeline-transported crude oils, providing crucial support for the digital and intelligent transformation of oil pipelines operation.

Key words: crude oil, pour point, hanging plate, tensile, online testing

References

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