«Oilfield engineering»

Evaluation of asphaltenes inhibitors efficiency on the basis of spectrophotometric studies

UDC: 622.276.6
DOI: -

Authors:

¹ Almetyevsk National Petroleum Institute, Almetyevsk, Russia

Keywords: high molecular weight deposits, asphaltenes, inhibitors, spectrophotometry, concentration, efficiency, oil dispersion system, light absorption coefficient

Annotation:

Asphaltenes are one of the main components of organic deposits that are formed in the bottomhole zone of the formation, on the surface of downhole equipment and equipment of oil collection and treatment system. Organic deposits with a high content of asphaltenes are characterized by high plasticity and strength. Their formation can lead to a loss of oil production, reservoir properties decrease and wettability change. One of the promising ways to prevent such complications is the use of asphaltene inhibitors. To assess inhibitors effect on the stability of asphaltenes under static and dynamic conditions, an appropriate technique has been developed. During the experiments it was revealed that an inhibitor concentration increases for individual oil samples led to asphaltenes stabilization decrease. Therefore, one of the important tasks is to determine the inhibitors optimal concentration for each potential object of implementation.

It is shown that the use of spectrophotometry makes it possible to accurately assess the ability of inhibitors to hold asphaltene clusters or aggregates in suspension and not precipitate from solution. This method can be used to select the concentration and type of inhibitors.

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