## Abstract

Experimental liquid densities of two Omani heavy oils are provided

as a function of temperature. The oils contain over 98%

unknown fractions with molecular weights over 600. The

unknown fractions were split using gamma function and characterized

with methods suited for conventional oils. In addition,

a previously developed saturated liquid density

correlation was modified to calculate the liquid densities of

the two heavy oils. A parameter so-called characteristic volume

was developed to substitute critical volume. A method

for estimating the characteristic volumes for unknown fractions

is devised. A set of mixing rules is also furnished to

apply with the modified density correlation. When the correlation

with the mixing rules were applied to the heavy oils, the

agreement with experimental liquid density data was found

satisfactory. Average absolute deviation in calculating densities

for both oils for temperatures from 288 K to 358 K was found

to be 1.2%.

as a function of temperature. The oils contain over 98%

unknown fractions with molecular weights over 600. The

unknown fractions were split using gamma function and characterized

with methods suited for conventional oils. In addition,

a previously developed saturated liquid density

correlation was modified to calculate the liquid densities of

the two heavy oils. A parameter so-called characteristic volume

was developed to substitute critical volume. A method

for estimating the characteristic volumes for unknown fractions

is devised. A set of mixing rules is also furnished to

apply with the modified density correlation. When the correlation

with the mixing rules were applied to the heavy oils, the

agreement with experimental liquid density data was found

satisfactory. Average absolute deviation in calculating densities

for both oils for temperatures from 288 K to 358 K was found

to be 1.2%.

Original language | English |
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Journal | Petroleum Science and Technology |

Publication status | Published - 2021 |

## Keywords

- Characterization; density; heavy oil; mixing rule

## ASJC Scopus subject areas

- Energy(all)