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Partially Coupled Fluid Flow Modeling for Stress Sensitive Naturally Fractured Reservoirs
This paper presents an innovative method of simulating stress dependent fluid flow in arbitrarily oriented fracture network. Previous fluid flow models for naturally fractured reservoirs neglect the effect of geomechanics on the reservoir productivity, or simplify it using experimental values. Moreover, most models simplify the problem by assuming that fractures are uniform in nature. These assumptions limit their applicability to realistic reservoir simulation.
A discrete fracture network has been generated from the authors' previous work, combining statistical and spatial analyses, object‐based modelling and conditional global optimization. An unsteady state fluid flow simulation model is developed, which is able to handle fluid flow between matrix‐fracture, matrix‐matrix, and fracture‐fracture; and effects of field stresses.
An upscaling procedure is developed based on grid‐based permeability tensor and applied to simulate fluid flow through arbitrarily oriented fracture network. Geomechanical solution is decomposed into matrix and fracture parts to calculate deformation. Finite element method and boundary element method are applied to the numerical modelling due to their accuracy level and flexibility in handling complex geometries, respectively.
The proposed method is validated against analytical results and its application on numerical tests has proven to be very efficient in terms delivering results with low computational resources. The results show that the model can overcome problems existing in previous models in relation to irregular fracture patterns, flow interactions between matrix and fracture and effect of deformation on fluid flow. Changes in matrix porosity, matrix permeability, fracture aperture, fracture permeability due to fluid flow are also studied.
Partially Coupled Fluid Flow Modeling for Stress Sensitive Naturally Fractured Reservoirs
This paper presents an innovative method of simulating stress dependent fluid flow in arbitrarily oriented fracture network. Previous fluid flow models for naturally fractured reservoirs neglect the effect of geomechanics on the reservoir productivity, or simplify it using experimental values. Moreover, most models simplify the problem by assuming that fractures are uniform in nature. These assumptions limit their applicability to realistic reservoir simulation.
A discrete fracture network has been generated from the authors' previous work, combining statistical and spatial analyses, object‐based modelling and conditional global optimization. An unsteady state fluid flow simulation model is developed, which is able to handle fluid flow between matrix‐fracture, matrix‐matrix, and fracture‐fracture; and effects of field stresses.
An upscaling procedure is developed based on grid‐based permeability tensor and applied to simulate fluid flow through arbitrarily oriented fracture network. Geomechanical solution is decomposed into matrix and fracture parts to calculate deformation. Finite element method and boundary element method are applied to the numerical modelling due to their accuracy level and flexibility in handling complex geometries, respectively.
The proposed method is validated against analytical results and its application on numerical tests has proven to be very efficient in terms delivering results with low computational resources. The results show that the model can overcome problems existing in previous models in relation to irregular fracture patterns, flow interactions between matrix and fracture and effect of deformation on fluid flow. Changes in matrix porosity, matrix permeability, fracture aperture, fracture permeability due to fluid flow are also studied.
Partially Coupled Fluid Flow Modeling for Stress Sensitive Naturally Fractured Reservoirs
Shao, Jian‐Fu (editor) / Burlion, Nicolas (editor) / Shaik, Abdul Ravoof. (author) / Tran, Nam H. (author) / Aghighi, Mohammed. A. (author) / Syed, Altaf H. (author) / Rahman, Sheikh S. (author)
2013-02-19
12 pages
Article/Chapter (Book)
Electronic Resource
English
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