Tar Mat Formation

Mineral products resembling tar can be produced from fossil hydrocarbons such as petroleum.

Tar mat formation. Tar mats are associated with a large concentration of asphaltenes. This methodology establishes a powerful new approach for conducting the analyses of asphaltene concentration grading and tar mat formation in oil reservoirs by integrating the yen. Tar mat formation and distribution studies. Tar mats were firstly discovered and determined accurately in terrestrial oil and gas reservoirs associated with lower tertiary sandstone reservoirs in the yaha field of the tarim basin china by thin layer chromatography flame ionization detector tlc fid and rock eval analysis.

Coal tar is produced from coal as a byproduct of coke production. The tar mat extracts were characterized by a sharp increase in the asphaltene content 20 60 wt compared with the oil leg extracts 1 5 wt. Intertek westport total quality assurance experts perform. Low permeability barriers are also present in the prudhoe.

The extract yields kg eom t rock in the tar mats ca. Tar mat formation has been poorly understood but is now being addressed in revealing case studies employing new asphaltene thermodynamics using the flory huggins zuo equation of state along with the yen mullins model of asphaltenes. The relative content of asphaltene in gross composition of tar mat extracts accounts for more than 30 that in. 4 46 for the oseberg field 8 18 for the ula field and 8 43 for the north american case study are significantly higher than in the.

Moreover with asphaltene enriched advective flow asphaltene buildup at the base oil water contact owc can give rise to asphaltene phase instability and tar mat formation when the asphaltene. The predictions are in good agreement with the laboratory and field observations and the mechanisms of forming these two kinds of tar mats are also discussed. Additionally tar mat formation mechanisms must be consistent with the observation that at least in the oseberg and ula fields the tar mats are located under permeability barriers excluding the possibility of settling asphaltene particulates through a large oil column to the tar mat. Cuttings descriptions in the eastern and western flanks and the possible mechanisms of tar mat formation.

Investigating and modeling tar mats in a kuwaiti carbonate reservoir and their role in understanding oil reserves and recovery economics by abdullah owidah almansour. Tar is a dark brown or black viscous liquid of hydrocarbons and free carbon obtained from a wide variety of organic materials through destructive distillation tar can be produced from coal wood petroleum or peat.