Development of Asphaltene Phase Equilibria Predictive Model

Nor-Azlan, N.; Adewumi, Michael A.

doi:10.2523/26905-ms

Cited by 8 publications

(6 citation statements)

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“…Asphaltene is dissolved in crude oil and crude oil forms a real solution 11,19,20,21,22,23,24,25,26,27,28,29,30,31,32 Reversibility experiments strongly support this model.…”

Section: Discussionmentioning

confidence: 82%

Productivity Decline of Vertical and Horizontal Wells by Asphaltene Deposition in Petroleum Reservoirs

Wang¹,

Civan²

2001

Proceedings of SPE International Symposium on Oilfield Chemistry

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractAsphaltene precipitation and deposition models were established and verified by typical experimental data. These models, the porosity and permeability reduction models, and the asphaltene mass balance equation were incorporated into a three-dimensional, three-phase black-oil simulator. Two typical cases involving asphaltene deposition in petroleum reservoirs associated with vertical and horizontal wells were investigated using the simulator. During the three-year period of production, the productivity index declined more than 50 % for both the vertical and horizontal wells. The pattern of asphaltene deposition in the reservoir with a horizontal well was found to be different from that in the reservoir with a vertical well.

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“…Asphaltene is dissolved in crude oil and crude oil forms a real solution 11,19,20,21,22,23,24,25,26,27,28,29,30,31,32 Reversibility experiments strongly support this model.…”

Section: Discussionmentioning

confidence: 82%

Productivity Decline of Vertical and Horizontal Wells by Asphaltene Deposition in Petroleum Reservoirs

Wang¹,

Civan²

2001

Proceedings of SPE International Symposium on Oilfield Chemistry

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“…The first approach considers that the asphaltene is dissolved in crude oil completely and therefore, the realsolution theory can be applied to determine the solubility of asphaltene in crude oil 8,[20][21][29][30][31][32][33][34][35][36][37][38][39][40][41] . The second approach considers that the asphaltene is suspended colloidally in crude oil and the crude oil containing asphaltene is a colloidal system.…”

Section: Asphaltene Precipitation In Reservoirs During Primary Oil Rementioning

confidence: 99%

Preventing Asphaltene Deposition in Oil Reservoirs by Early Water Injection

Wang¹,

Civan²

2005

Proceedings of SPE Production Operations Symposium

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractA comprehensive modeling and simulation of asphaltene precipitation and deposition in petroleum reservoirs is carried out. The effects of the asphaltene deposition on reservoir properties, and the productivity of the vertical and horizontal wells during primary oil recovery are demonstrated. An early water-injection development scheme for suppressing asphaltene deposition is proposed and its feasibility is investigated by means of simulation. The performance of the early water-injection development scheme is compared with the direct depletion development scheme.The results indicate that the early water-injection not only increases the oil recovery significantly but also extends the economic production life of the reservoir considerably.

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“…Generally, the models for state of asphaltene in solution can be categorised in two main groups, real solution model and colloidal model. Many researchers (Hirschberg et al, 1984;Burke et al, 1990;Novosad and Costain, 1990;Kawanaka et al, 1991;Chung, 1992;Thomas et al, 1992;Nghiem et al, 1993Nghiem et al, , 1998Nor-Azlan and Adewumi, 1993;Cimino et al, 1995;de Boer et al, 1995;MacMillan et al, 1995;Yarranton and Masliyah, 1996;Nghiem and Coombe, 1997;Akbarzadeh et al, 2002) considered that the asphaltene is completely dissolved in crude oil; therefore, a real solution theory can be applied to determine the solubility of asphaltene in crude oil. The real solution model was supported by the reversibility of asphaltene precipitation.…”

Section: Introductionmentioning

confidence: 99%

Experimental, modelling and optimisation of asphaltene deposition and adsorption in porous media

et al. 2011

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The deposition of asphaltene is considered to be one of the most difficult problems during oil production. Asphaltene deposition in the reservoir is a complex problem; and, due to the depth of reservoirs, it is impossible to do field experiments. Thus, to study the effects of asphaltene deposition, it is essential to rely on different models that are developed for asphaltene adsorption and deposition on the basis of the laboratory experimental results. In this manuscript, the focus is on the adsorption and deposition of asphaltene in porous media. A new model for asphaltene adsorption and deposition in porous media and a corresponding numerical method are developed using an implicit scheme. A procedure for estimating the asphaltene deposition and adsorption parameters is described, and a new optimisation method is introduced. This method applies the genetic algorithm to investigate an initial set of parameters as an input for the direct search optimisation method. The direct search estimates the asphaltene deposition and adsorption parameters, which results in an acceptable match with the experimental data. To validate the model, both the available experimental data in the literature and data from this study are examined with the developed model; and, reasonable results are obtained.

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Development of Asphaltene Phase Equilibria Predictive Model

Cited by 8 publications

References 0 publications

Productivity Decline of Vertical and Horizontal Wells by Asphaltene Deposition in Petroleum Reservoirs

Productivity Decline of Vertical and Horizontal Wells by Asphaltene Deposition in Petroleum Reservoirs

Preventing Asphaltene Deposition in Oil Reservoirs by Early Water Injection

Experimental, modelling and optimisation of asphaltene deposition and adsorption in porous media

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