Streamline simulation of counter-current imbibition in naturally fractured reservoirs

Alhuthali, Ahmed; Datta‐Gupta, Akhil

doi:10.1016/j.petrol.2004.03.001

Cited by 32 publications

(14 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prolonged tailing of concentrations has been encountered due to the slow release of residual contaminants from fine textured and organic (e.g., lignite) layers to coarse textured layers (Grathwohl et al, 2004). For similar reasons, a considerable effort is required to extract residual amounts of oil from subsurface petroleum reservoirs in fractured rock or heterogeneous sediment systems (Al-Huthali and Datta-Gupta, 2004). PF processes in the vadose zone of fractured rocks have also been intensely studied (Dasgupta et al, 2006a), e.g., in the framework of assessing the suitability of potential nuclear waste repositories (Wu and Pruess, 2000).…”

Section: Introductionmentioning

confidence: 99%

A review of model applications for structured soils: a) Water flow and tracer transport

Köhne

Šimůnek

2009

Journal of Contaminant Hydrology

290

224

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A review of model applications for structured soils: a) Water flow and tracer transport

Köhne

Šimůnek

2009

Journal of Contaminant Hydrology

290

224

View full text Add to dashboard Cite

“…14,15 This allows us to utilize much of the techniques related to production data integration developed for single porosity streamline models. However, compared to the single porosity systems, the propagation of the saturation front in the fracture is retarded significantly because of the exchange of fluid with the matrix in dual porosity systems.…”

Section: -13mentioning

confidence: 99%

“…The streamline approach has recently been extended to fractured reservoirs using the dual media approach. 14,15 The streamline simulation uses an IMPES approach where fracture pressure is solved first then fracture saturation. Matrix saturation is updated using a transfer function that governs fluid exchange between the two mediums.…”

Section: Dual Porosity Fracture Flow Simulationmentioning

confidence: 99%

See 1 more Smart Citation

Streamline-Based Production Data Integration in Naturally Fractured Reservoirs

Al-Harbi

Cheng

et al. 2005

SPE Journal

Self Cite

View full text Add to dashboard Cite

Streamline-based models have shown great potential in reconciling high resolution geologic models to production data. In this work we extend the streamline-based production data integration technique to naturally fractured reservoirs. We use a dualporosity streamline model for fracture flow simulation by treating the fracture and matrix as separate continua that are connected through a transfer function. Next, we analytically compute the sensitivities that define the relationship between the reservoir properties and the production response in fractured reservoirs. Finally, production data integration is carried out via the Generalized Travel Time inversion (GTT). We also apply the streamline-derived sensitivities in conjunction with a dual porosity finite difference simulator to combine the efficiency of the streamline approach with the versatility of the finite difference approach. This significantly broadens the applicability of the streamlinebased approach in terms of incorporating compressibility effects and complex physics.The number of reservoir parameters to be estimated is commonly orders of magnitude larger than the observation data, leading to non-uniqueness and uncertainty in reservoir parameter estimate. Such uncertainty is passed to reservoir response forecast which needs to be quantified in economic and operational risk analysis. In this work we sample parameter uncertainty using a new two-stage Markov Chain Monte Carlo (MCMC) that is very fast and overcomes much of its current limitations. The computational efficiency comes through a substantial increase in the acceptance rate during MCMC by using a fast linearized approximation to the flow simulation and the likelihood function, the critical link between the reservoir model and production data. The Gradual Deformation Method (GDM) provides a useful framework to preserve geologic structure. Current dynamic data integration methods using GDM are inefficient due to the use of numerical sensitivity calculations which limits the method to deforming two or three models at a time. In this work, we derived streamline-based analytical sensitivities for the GDM that can be obtained from a single simulation run for any number of basis models. The new Generalized Travel Time GDM (GTT-GDM) is highly efficient and achieved a performance close to regular GTT inversion while preserving the geologic structure.

show abstract

“…The current literature in the petroleum community dealing with flow in fractured reservoirs is largely confined to topological equivalents of the sugar-cube model, i.e., the matrix blocks are surrounded by fractures from all sides [2,3,8,26,27,48,53,61]. However, the VFR (aggregated-column) model is topologically different because it is not connected to the fracture network through the top and bottom of the matrix column.…”

Section: Introductionmentioning

confidence: 99%

Upscaling of fractured oil reservoirs using homogenization including non-equilibrium capillary pressure and relative permeability

Salimi

Bruining

2011

Comput Geosci

View full text Add to dashboard Cite

Recovery from incompletely water-wet fractured reservoirs can be extremely low. A reason for the low recovery is related to wetting issues, whereas the reason for slow recovery can be the non-equilibrium behavior of capillary pressure. One of the non-equilibrium theories is developed by Barenblatt et al. and it modifies both capillary pressure and relative permeabilities. The other theory is developed by Hassanizadeh et al. and it only deals with non-equilibrium effects for capillary pressure. To incorporate non-equilibrium in larger-scale problems, we apply homogenization to derive an upscaled model for fractured reservoirs in which the nonequilibrium effects are included. We formulate a fully implicit three-dimensional upscaled numerical model. Furthermore, we develop a computationally efficient numerical approach to solve the upscaled model. We use simulations to determine the range of delay times and capillary-damping coefficients for which discernable effects occur in terms of oil recovery. It is shown that at low Peclet numbers, i.e., when the residence time of the fluids in the fracture is long with respect to the imbibition time, incorporation of delay times of the order of few months have no significant effect on the oil recovery. However, when the Peclet number is large, the delay times reduce the rate of oil recovery. We discuss for which values of the delay time (Barenblatt) and capillary-damping coefficient (Hassanizadeh), significant delays in oil production occur.

show abstract

Streamline simulation of counter-current imbibition in naturally fractured reservoirs

Cited by 32 publications

References 18 publications

A review of model applications for structured soils: a) Water flow and tracer transport

A review of model applications for structured soils: a) Water flow and tracer transport

Streamline-Based Production Data Integration in Naturally Fractured Reservoirs

Upscaling of fractured oil reservoirs using homogenization including non-equilibrium capillary pressure and relative permeability

Contact Info

Product

Resources

About