Rheological and Chemical Properties of Alaska Heavy Oils

Liberatore, Matthew W.; Herring, Andrew M.; Li, Kejing; Bazyleva, Ala; Akeredolu, Babajide; Prasad, Manika; Batzle, Michael

doi:10.1190/urtec2013-203

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…[16][17][18] This viscous characteristic of bitumen is the most significant thermophysical characteristic, clarifying the bitumen transport properties and the volume of bitumen in place. [19][20][21][22] Thus, having a deep understanding of bitumen's rheological behaviour facilitates a more successful in-situ recovery process.…”

Section: Introductionmentioning

confidence: 99%

The effect of bitumen molecular fractions on diffusivity and rheology of bitumen under high‐temperature conditions: Molecular dynamics (MD) simulation study

2022

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Heavy oil and bitumen play an incredible role in Canada's energy resources. The main processes that have already been applied to produce heavy oil and bitumen are in‐situ thermal methods. The primary mechanism of production in these reservoirs is a reduction in heavy oil and bitumen viscosities via heat transfer. Having deep knowledge about the rheological behaviour of heavy oil and bitumen is crucial to designing a more accurate and efficient in‐situ thermal recovery method. In this work, molecular dynamics (MD) simulation was used to model the rheological behaviour of bitumen under different temperatures. According to MD outputs, the highest diffusion coefficient between bitumen fractions belongs to saturate fractions. On the other hand, the lowest diffusion coefficient belongs to asphaltene fractions. The size of asphaltene, its polarity, and the polarity of a resin fraction affect the diffusion coefficient of asphaltene in a bitumen sample and its rheological behaviour. The MD simulation aims to provide molecular insights and essential information about the rheological trend of bitumen under different thermodynamic conditions. The results of the current work provide essential information about the effect of bitumen fractions on its rheological behaviour.

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Section: Introductionmentioning

confidence: 99%

The effect of bitumen molecular fractions on diffusivity and rheology of bitumen under high‐temperature conditions: Molecular dynamics (MD) simulation study

2022

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An Investigation Into the Cold Heavy Oil Production With Sand Process Using Synthetic Cores and Designed Experiments

Narayan

Awoleke

Ahmadi

et al. 2016

SPE Western Regional Meeting

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This study deals with the development of a methodology for making low compressive strength cores used in an experimental investigation of the Cold Heavy Oil Production with Sand (CHOPS) process. An experimental setup was designed and built to investigate the effect of rock compressive strength as well as flow parameters, such as oil viscosity, net and total confining pressure and injection rate on core permeability. The approach was to optimize the value of a response variable by changing the values of the affecting factors.Sand blends were prepared by varying the ratios of aggregate, cementing material and water to prepare synthetic cores. An experimental unit was built to simulate wormhole propagation during the CHOPS process, where oil, at an ambient temperature, was injected at varying rates of 0.5-10 ml/min into 2-inch ϫ 4-inch cores under differential confining pressures of 500 and 1000 psia. The pressure drop across the core was monitored throughout the process.When non-swelling clay is used as a cementing material compared with actual cement to make synthetic core, the compressive strength of the samples fall dramatically by 64%. Two factors were considered in the experiments: Oil Viscosity (370 and 690 cp) and Injection Rates (0.5 and 3 ml/min) at a net confining pressure of 500 psi, less than the compressive strength of the core. The experimental results demonstrated that at lower pore volumes of injection, the permeability of the core for high viscosity oil is almost 11.2% greater than for low viscosity oil. Also, we used design of experiment approach and developed regression models for permeability based on values recorded at specific pore volumes injected for different injection rates and oil viscosities. It was found that at a constant confining pressure for all rates, at lower pore volumes injected, 99.8% of the variance in permeability can be explained by oil viscosity, injection rate and their interaction. At higher pore volumes injected, the variance in permeability that can be explained by oil viscosity, the injection rate and their interaction is only 40.63%.

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Rheological and Chemical Properties of Alaska Heavy Oils

Cited by 2 publications

References 12 publications

The effect of bitumen molecular fractions on diffusivity and rheology of bitumen under high‐temperature conditions: Molecular dynamics (MD) simulation study

The effect of bitumen molecular fractions on diffusivity and rheology of bitumen under high‐temperature conditions: Molecular dynamics (MD) simulation study

An Investigation Into the Cold Heavy Oil Production With Sand Process Using Synthetic Cores and Designed Experiments

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