Crude oil flowability detection method and device

Abstract

The invention provides a crude oil flowability detection method and device. The method includes: building a crude oil apparent viscosity database according to the corresponding relation between the apparent viscosity of various liquid-state crude oil and crude oil temperature and the corresponding relation between the proton spin relaxation signal quantity of various crude oil and crude oil temperature, wherein the apparent viscosity database is used for storing the corresponding relation between the apparent viscosity of various crude oil and the proton spin relaxation signal quantity; detecting the proton spin relaxation signal quantity of target crude oil under different temperature conditions , wherein the target crude oil is in a liquid state, a solid state or a colloidal state; determining the apparent viscosity of the target crude oil under different temperature conditions in the crude oil apparent viscosity database according to the proton spin relaxation signal quantity of thetarget crude oil under different temperature conditions. By the method, crude oil flowability detection convenience and accuracy can be increased effectively, and lossless qualitative / quantitative analysis of crude oil flowability is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum detection, in particular to a crude oil fluidity detection method and device. Background technique [0002] Crude oil is unprocessed petroleum, which is a dark brown viscous oily liquid with green fluorescence and a special smell. Crude oil can refer to ordinary crude oil, high pour point crude oil, heavy oil and super heavy oil. Unrefined petroleum. In order to process crude oil more accurately and reliably, it has become an indispensable and important step in the petroleum industry to evaluate the properties of crude oil before processing, especially for the evaluation of the fluidity of crude oil, and for the extraction, gathering and transportation of crude oil. are of great guiding significance. Since the fluidity of crude oil is mainly affected by factors such as temperature, the added fluidity improver, and heavy oil viscosity reducer, the detection method for the fluidity of crude oil ...

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Problems solved by technology

[0004] However, when directly using a viscometer or a rheometer to test the crude oil fluidity of the apparent viscosity of crude oil, if some heavy oil or super heavy oil is at room temperature or low temperature, its state tends to be solid or colloidal, then Unable to spread evenly on the cone plate of a rotational rheometer, which will lead to large errors in the original fluidity test data, and the detection of crude oil on different instruments will also affect the accuracy of crude oil detection. If the above The heating treatment of heavy oil or super heavy oil will cause the different components in the crude oil to evaporate, which will still affect the accuracy of the test results to a large extent. In addition, each time the fluidity of crude oil is tested, it is necessary to perform The above steps also increase the time-consuming and cumbersome procedures of the detection process

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