TY - JOUR

T1 - The stability and evolution of oil systems studied via advanced methods in situ

AU - Martyanov, Oleg N.

AU - Larichev, Yurii V.

AU - Morozov, Evgeny V.

AU - Trukhan, Sergey N.

AU - Kazarian, Sergei G.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The potential of physical methods for in situ studies of the phase stability and physicochemical evolution of heavy oils is analyzed. The basic principles of in situ application of the methods are outlined; the scope and limitations of each approach are discussed. Particular attention is paid to the visualization of the asphaltene aggregation process using attenuated total reflection Fourier transform IR spectroscopy and magnetic resonance imaging, as well as small-angle X-ray and neutron scattering, electron spin resonance and electron and optical microscopy. These methods provide complementary information on the properties and behaviour of oil disperse systems on various spatial and temporal scales ranging from the rotational mobility of asphaltene molecules and the dynamics of their local environment with a characteristic time of ~10-10 s and evolution of the size characteristics and shape of asphaltene aggregates to visualization of asphaltene aggregation and formation of precipitates in crude oils and their blends with spatial resolution from a few to thousands of micrometres with a characteristic time from seconds to hundreds of hours. The approaches described can be efficiently applied in a wide range of temperatures and pressures, as well as in the presence of chemicals that affect the stability of heavy oils. The bibliography includes 241 references.

AB - The potential of physical methods for in situ studies of the phase stability and physicochemical evolution of heavy oils is analyzed. The basic principles of in situ application of the methods are outlined; the scope and limitations of each approach are discussed. Particular attention is paid to the visualization of the asphaltene aggregation process using attenuated total reflection Fourier transform IR spectroscopy and magnetic resonance imaging, as well as small-angle X-ray and neutron scattering, electron spin resonance and electron and optical microscopy. These methods provide complementary information on the properties and behaviour of oil disperse systems on various spatial and temporal scales ranging from the rotational mobility of asphaltene molecules and the dynamics of their local environment with a characteristic time of ~10-10 s and evolution of the size characteristics and shape of asphaltene aggregates to visualization of asphaltene aggregation and formation of precipitates in crude oils and their blends with spatial resolution from a few to thousands of micrometres with a characteristic time from seconds to hundreds of hours. The approaches described can be efficiently applied in a wide range of temperatures and pressures, as well as in the presence of chemicals that affect the stability of heavy oils. The bibliography includes 241 references.

KW - ELECTRON-SPIN-RESONANCE

KW - ANGLE X-RAY

KW - HEAVY CRUDE-OIL

KW - MAGNETIC-RESONANCE

KW - ASPHALTENE AGGREGATION

KW - PARAMAGNETIC-RESONANCE

KW - VANADYL COMPLEXES

KW - MOLECULAR-DYNAMICS

KW - PETROLEUM ASPHALTENES

KW - NMR-SPECTROSCOPY

UR - http://www.scopus.com/inward/record.url?scp=85039074143&partnerID=8YFLogxK

U2 - 10.1070/RCR4742

DO - 10.1070/RCR4742

M3 - Review article

AN - SCOPUS:85039074143

VL - 86

SP - 999

EP - 1023

JO - Russian Chemical Reviews

JF - Russian Chemical Reviews

SN - 0036-021X

IS - 11

ER -