METHOD OF ASSESSING ASPHALTENE INHIBITOR EFFICIENCY Russian patent published in 2018 - IPC C10G75/00 E21B37/06 C09K8/524 

FIELD: measurement; testing.

SUBSTANCE: invention relates to methods for assessing the effectiveness of an asphaltene inhibitor / dispersant using crude oil. Method for assessing the effectiveness of an asphaltene inhibitor / dispersant in crude oil comprises: a) weighing a first coupon; immersing the first coupon or a portion thereof into a first sample for a first selected time period, the first sample comprising an aliquot of the crude oil; adding a precipitant to the first sample within the first selected time period; removing the first coupon from the first sample at the end of the first selected time period; and drying and weighing the first coupon; (b) weighing a second coupon; immersing the second coupon or a portion thereof into a second sample for a second selected time period, the second sample comprising an aliquot of the crude oil and an asphaltene inhibitor/dispersant; adding a precipitant to the second sample within the second selected time period; removing the second coupon from the second sample at the end of the second selected time period; and drying and weighing the second coupon; (c) determining the weight of asphaltenes deposited on the first coupon and the weight of asphaltenes deposited on the second coupon; and (d) determining the percentage of asphaltene deposition inhibition.

EFFECT: technical result is rapid screening of a large number of samples, collection of a set of results in a short period of time, using the minimum volume of fluid per result.

22 cl, 2 tbl, 1 dwg