Asphaltene Particles in Fossil Fuel Exploration, Recovery, by A. Chakma, M. R. Islam, F. Berruti (auth.), Mahendra K.

By A. Chakma, M. R. Islam, F. Berruti (auth.), Mahendra K. Sharma, Teh Fu Yen (eds.)

THE present cutting-edge of a number of elements of asphaltene is gifted during this quantity. It records the lawsuits of the Internationl Symposium on Asphaltene debris in Fossil gas Exploration, restoration, Refining and construction techniques backed via the high-quality particle Society (FPS). This assembly was once held il1 Las vegas, Nevada, July thirteen -17, 1992. The symposium upon which this quantity relies used to be equipped in 4 classes emphasizing quite a few uncomplicated and utilized elements of analysis on asphaltene know-how. significant subject matters mentioned contain floor phenomena of asphaltene, processed and unprocessed bitumen, asphaltene impression on traditional and speeded up ageing of bitumens, asphaltene conversion, theoretical facets of asphaltenes and interactions of asphaltene colloids in natural solvents. This variation comprises eighteen chosen papers provided on the symposium. those papers are divided in 4 extensive different types: (1) Bitumen and Coal-Derived Asphaltenes, (2) Asphalt and Asphaltene conversion, (3) floor and Colloidal elements of Asphaltenes, and (4) Thermodynamic and Molecular features of Asphaltenes.

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Asphaltene conversion and liquid product viscosity for different catalyst combination (Temp. ). 59 .. - 80 . - - - - - - - - - - - - - - - . 1 . 0 0 ::e 0 !. 90 50 (J w w z J: a. 85 Fig. 9. ). 80 390 400 410 420 430 440 450 TEMPERATURE (C) Figure 11 shows product yield for the non-catalytic case. AS can be seen, processing of asphaltene with tetralin provided the lowest yield of asphaltene, thus indicating the highest asphaltene conversion. It also provided the highest yield of maltenes. This superior performance of tetralin can be attributed to its hydrogen donor capability.

Consequently, a permeability ratio of 4 was considered to be optimum. 35 W G\ ~ ~8 ~7 ~6 ~5 ~4 ~3 ~2 ~o ~~ ~ ~ 2 4 2 2 2 2 2 2 2 2 2 2 2 2 4 ~ 2 3 4 5 6 7 8 9 Perm. 5 7 Flow restriction parameter, g 14 asphaltene precipitation considered Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run no. 5 ~o 1. 5 ~o Diffusion coef. 5 Absolute permeability 40 60 20 20 20 20 20 20 20 20 20 20 20 20 ~o 20 20 20 Flow rate(m TABLE 1. CHARACTERISTICS OF NUMERICAL RUNS t 200 ft BITUMEN 50ft BonOM WATER ZONE 300ft Figure 1.

Verhasselt, A. F. and Choquet, F. , A New Approach to Studying the Kinetics of Bitumen Ageing, International Symposium on "Chemistry of Bitumen", Proceedings, Vol. II, pp. 686-705, Rome (1991). 10. Verhasselt, A. , A Kinetic Approach to the Ageing of Bitumens, In "ASPHALTENES AND ASPHALT", vol. II, Development in Petroleum Science Series, (Editors T. F. Yen and G. V. Chilingarian), Elsevier Science Publishers, The Netherlands, To be Published. M. R. Islam Department of Geological Engineering South Dakota School of Mines and Technology Rapid City, SD 57701 (USA) ABSTRACT A comprehensive numerical simulator is developed from an existing bitumen leaching model to incorporate the effects of asphaltene precipitation during bitumen mobilization with a solvent.

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