STAB_WELL is a simulating software, based on fully-coupled reservoir-geomechanics models, designed for wellbore stability and underbalanced drilling.
In general, fractured formations, shales, poorly cemented rock are subjected to wellbore stability studies. Safe mud windows used in practice are often based on experience, which can be restricted in their applicability.
To avoid formation damage, underbalanced drilling has been extensively used in the field, bottom hole pressure control, circulation solid-carrying capacity, and hole integrity become three key factors in drilling design.
STAB_WELL calculates a safe mud density window for hole fracturing and collapse based on geomechanics input generated from lab, logging, or database provided. This window is controlled by well depth and well orientations to in-situ stresses.
STAB_WELL can be used to evaluate if an open hole is stable so that those unnecessary cased wells can be avoided to save cost.
STAB_WELL can also be used to simulate cavity-failure well completion strategy, used extensively in coalbed methane productions.
During horizontal well drilling in oil-bearing formation,STAB_WELL can be used to calculate the optimum gas volume injected, underbalanced pressure, and the capacity on the surface equipment, and minimum BHP for stability.
For open hole production, STAB_WELL can be used to calculate maximum production before instability.
STAB_WELL can also be used to evaluate formation damage and enhanced production by rock skeleton deformations.
FEATURES AND APPLICATION :
* air/mist/nitrogen/foam
* Hole collapse pressure
* Surface equipment design
* Mud carrying-capacity
* Bottom hole injection
- Critical BHP and Production Rate
- Safe mud density windows
- Stability in inclined and horizontal wells
- Stability in open hole and cased hole
- Thermal and effective stress analyses
- Circulation pressure along annulus
- Tri-axial test data extraction
- Approximation on rock mechanics data
- Sensitivity analyses on key-parameters
- Stability, formation damage, and fracturing in underground storage
- Cavity-failure completion simulations
- Perforation stability analyses
- Stability during production
- Stability in swelling shale
- Hollow cylinder test simulations
- Well orientation for stability and optimized production
- 3D visualization on mud density
- Collapsing size COMPUTING s
- Computing on conductive/convective heat transfer
- Thermally and deformation induced pore pressure
- Pre-casing failure computings
- Rock mechanics inputs from logging data
- Formation damage evaluation by skeleton deformation
- Simulation on induced fractures by cold water injection
