39
molar volume of the solute at its normal boiling point, in m
3
mol
−1
. (note: this is the
correct version of the Hayduk-Laudie formula as expressed in base SI units; the
reader is warned that the abstract of the original article by Hayduk and Laudie
(1974) contains a typo in one of the coefficients.) The effects of both pressure and
salinity on diffusivities in water are yet unclear as no definite picture emerges from
the scarce data available in the scientific literature. Yet, these data indicate that these
effects are likely limited for conditions of environmental significance.
3.3.6 Interfacial Tension
Interfacial tension between petroleum phases and seawater can be extrapolated from
one measured value; however it is notably difficult to predict it in the absence of any
measured value. A method has, for example, been presented by Firoozabadi and
Ramey (1988), but its prediction ability is very limited unless a measured value can be
used for scaling of predictions (Danesh 1998). Such measurements have been made in
the aftermath of the Deepwater Horizon disaster (Schlüter and Pesch unpublished
data; Abdelrahim and Rao 2014; Venkataraman et al. 2013). However, this information is usually lacking before an accidental release occurs, as highlighted by the paucity of such data reported in oil libraries such as the NOAA ADIOS oil library.
3.4 Summary
In summary, this chapter describes geochemical aspects confining the molecular
composition and physicochemical properties of a petroleum in the reservoir with a
specific focus on the Macondo well oil. Important physicochemical properties of
petroleum under reservoir conditions and when released into the seawater are discussed and compared between experimental and simulated data. Several of these
physical and chemical petroleum properties affected by processes involved in
Deepwater Horizon oil spill will be further discussed throughout this book.
Acknowledgment This research was made possible by a from the Gulf of Mexico Research
Initiative/C-IMAGE. Data are publicly available through the Gulf of Mexico Research Initiative
Information and Data Cooperative (GRIIDC) at https://data.gulfresearchinitiative.org/ (DOI:
10.7266/n7-xpgb-g817, DOI: 10.7266/N7DF6PQK, DOI: 10.7266/N7HX19QW, DOI: 10.7266/
N7J38R2F) and at http://gulfresearchinitiative.org/hydrocarbon-intercalibration-experiment/
References
Abdelrahim MA, Rao DN (2014) Measurement of interfacial tension in hydrocarbon/water/dispersant systems at deepwater conditions. Oil Spill Remediat. Wiley Online Books. https://doi.
org/10.1002/9781118825662.ch14
3 Physical and Chemical Properties of Oil and Gas Under Reservoir and Deep-Sea…
molar volume of the solute at its normal boiling point, in m
3
mol
−1
. (note: this is the
correct version of the Hayduk-Laudie formula as expressed in base SI units; the
reader is warned that the abstract of the original article by Hayduk and Laudie
(1974) contains a typo in one of the coefficients.) The effects of both pressure and
salinity on diffusivities in water are yet unclear as no definite picture emerges from
the scarce data available in the scientific literature. Yet, these data indicate that these
effects are likely limited for conditions of environmental significance.
3.3.6 Interfacial Tension
Interfacial tension between petroleum phases and seawater can be extrapolated from
one measured value; however it is notably difficult to predict it in the absence of any
measured value. A method has, for example, been presented by Firoozabadi and
Ramey (1988), but its prediction ability is very limited unless a measured value can be
used for scaling of predictions (Danesh 1998). Such measurements have been made in
the aftermath of the Deepwater Horizon disaster (Schlüter and Pesch unpublished
data; Abdelrahim and Rao 2014; Venkataraman et al. 2013). However, this information is usually lacking before an accidental release occurs, as highlighted by the paucity of such data reported in oil libraries such as the NOAA ADIOS oil library.
3.4 Summary
In summary, this chapter describes geochemical aspects confining the molecular
composition and physicochemical properties of a petroleum in the reservoir with a
specific focus on the Macondo well oil. Important physicochemical properties of
petroleum under reservoir conditions and when released into the seawater are discussed and compared between experimental and simulated data. Several of these
physical and chemical petroleum properties affected by processes involved in
Deepwater Horizon oil spill will be further discussed throughout this book.
Acknowledgment This research was made possible by a from the Gulf of Mexico Research
Initiative/C-IMAGE. Data are publicly available through the Gulf of Mexico Research Initiative
Information and Data Cooperative (GRIIDC) at https://data.gulfresearchinitiative.org/ (DOI:
10.7266/n7-xpgb-g817, DOI: 10.7266/N7DF6PQK, DOI: 10.7266/N7HX19QW, DOI: 10.7266/
N7J38R2F) and at http://gulfresearchinitiative.org/hydrocarbon-intercalibration-experiment/
References
Abdelrahim MA, Rao DN (2014) Measurement of interfacial tension in hydrocarbon/water/dispersant systems at deepwater conditions. Oil Spill Remediat. Wiley Online Books. https://doi.
org/10.1002/9781118825662.ch14
3 Physical and Chemical Properties of Oil and Gas Under Reservoir and Deep-Sea…