«Onshore and offshore oil and gas well construction»

Study of the influence of hydrocarbon solvents and organic particle inhibitors on the stability of super-viscous oil

UDC: 622.276.6
DOI: -

Authors:

¹ Ukhta State Technical University, Ukhta, Russia

Keywords: super-viscous oil, hydrocarbon solvent, asphaltene inhibitor, oil stability, spectrophotometry

Annotation:

By nowadays, steam-thermal technologies such as area injection, cyclic steam treatment, thermal gravity drainage and their varieties have remained the most widely used methods for developing extra-viscous oil (EVO) deposits. One of the pressing problems of developing thin EVO deposits (10 m or less) is the reduction of formation heating efficiency due to significant heat losses through the roof and bottom. One of the effective methods of further oil viscosity reduction is to add hydrocarbon solvents (HCS) to the steam flow, which when enter the productive formation mix with oil and significantly increase its mobility. In an earlier work [4], some of the most promising HCS and organic particle inhibitors for injection into the formation were considered. Adding inhibitors is necessary to increase the stability of the oil, since, for example, the use of only aliphatic solvents can lead to the precipitation of solid organic sediment, and as a consequence, to the clogging of the reservoir pores and the loss of oil components. The object of the study is the process of mixing super-viscous oil and a mixture of hydrocarbon solvents. The authors of the article present the results of experimental studies of the effect of several promising inhibitors of solid particles on the stability of the mixture of oil and HCS. The studies were carried out sequentially using two methods – spectrophotometry and according to the GOST 32059-2013 standard.

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