Sunday, May 20, 2012

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Computer Modeling and Numerical Simulations

Geomechanics in recent decades has become an important consideration in the petroleum industry. From extended horizontal drilling with multi-lateral junctions in fields that are tectonic and fractured, to severely depleted reservoirs with compaction and altered rock permeability, analysis from a geomechanical perspective provides solutions to such problems that could adversely impact hydrocarbon recovery as well as the environment.

At MetaRock Laboratories, we specialize in geomechanical analysis via computer modeling and numerical simulations. Our modeling capabilities support the analysis of wellbore stability problems and rock integrity problems of multi-lateral wellbore systems. With relevant reservoir data, our geomechanical models can also simulate reservoir conditions to study compaction, surface heave, subsidence and seal integrity.
 


Wellbore Stability Modeling

Wellbore hole-closure is computed as a function of mud pressure to determine the mud pressure at which the plastic strain reaches a critical value.

 Plastic strain with amplified deformation

 


 

  


Multi-Lateral Wellbore Modeling

 

A multi-lateral wellbore of any orientation can be designed as a three dimension finite element model to support the analysis of stresses and rock integrity at the junction.

 

3D finite element mesh of multi-lateral junction

Plastic strain at junction

   

Plastic strain at 40mm below junction

 


Reservoir Compaction and Surface Subsidence Modeling

 

During production, the reservoir experiences surface subsidence and reservoir compaction due to hydrocarbon recovery. A finite element model can be designed to simulate surface subsidence and reservoir compaction.

Finite element model to simulate reservoir compaction and surface subsidence due to pressure depletion (reservoir region is colored red)

 

 

 

  Amplified subsidence and compaction due to production

  


Thermal Injection Recovery Modeling

 

Thermal stimulation via steam injection to enhance hydrocarbon recovery can be modeled to determine the resultant heave at the surface level.

 Finite element model to simulate surface heave due to steam injection in the reservoir region (circled red)

 

 

 

Amplified heave due to steam injection

 


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