Loading...

Dynamic modeling and optimization of asphaltene deposition in reservoir rocks using genetic algorithm

Bagheri, M. B ; Sharif University of Technology | 2010

1341 Viewed
  1. Type of Document: Article
  2. Publisher: Society of Petroleum Engineers , 2010
  3. Abstract:
  4. Asphaltene deposition is a problematic challenge for oil production. Changes in key parameters like pressure and fluid composition during natural depletion and different gas injection scenarios may result in asphaltene precipitation and deposition. In this work, a model is developed by application of mass balance equations, momentum equation, asphaltene deposition and permeability reduction models. An algorithm is developed to perform iterative procedure to solve the numerical equations that contains highly coupled variables. Indeed, an equation is introduced to calculate the saturation of the precipitated asphaltene phase. Model parameters were determined by genetic algorithm which is a powerful technique for history matching. Also, nonlinear solver was applied to distinguish the dominant mechanism of asphaltene deposition in the core. Natural depletion Experiments were achieved under high pressure, high temperature conditions for model validation and simulation of asphaltene deposition in which asphaltene content was measured by IP 143 test. Accurate match between model predictions and experimental data confirms the reliability of the model for simulation of asphaltene deposition in porous media. Optimization results showed that all major deposition mechanisms (surface deposition, entrainment and pore throat plugging) played role in permeability evolution and there is relation between model parameters and severity of asphaltene deposition
  5. Keywords:
  6. Computer simulation ; Deposition ; Engineering exhibitions ; Engineers ; Genetic algorithms ; Optimization ; Petroleum engineering ; Petroleum reservoir evaluation ; Petroleum reservoirs ; Porous materials ; Asphaltene content ; Asphaltene deposition ; Asphaltene phase ; Asphaltene precipitation ; Deposition mechanism ; Dominant mechanism ; Dynamic modeling ; Experimental data ; Fluid composition ; Gas injection ; High pressure ; High temperature condition ; History matching ; Iterative procedures ; Key parameters ; Mass balance equations ; Model parameters ; Model prediction ; Model validation ; Momentum equation ; Natural depletion ; Non-linear solver ; Oil production ; Permeability evolution ; Permeability reduction ; Pore throat ; Porous Media ; Reservoir rock ; Surface deposition ; Asphaltenes
  7. Source: 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010: A New Spring for Geoscience. Incorporating SPE EUROPEC 2010 ; Volume 6 , 2010 , Pages 4291-4295 ; 9781617386671 (ISBN)
  8. URL: http://earthdoc.eage.org/publication/publicationdetails/?publication=39742