果冻传媒

Efficient drilling through a better understanding of wellbore stability

The Techlog wellbore stability module enables users to further develop the understanding gained from analysis in the Techlog pore pressure prediction module by taking into account the in situ stress states around the wellbore. The user is guided through the different steps required to build a calibrated mechanical earth model (MEM), which integrates all data. The MEM helps the user gain a thorough understanding of the properties of the rock surrounding the wellbore and the in situ stresses, enabling the prediction of potential shear and tensile failures at the borehole walls. Techlog wellbore stability can predict the breakout and breakdown pressure based on the wellbore direction versus the azimuth of the principal stresses.

Several shear failure criteria are available, including Mohr-Coulomb, Mogi-Coulomb, and Modified Lade.

The user can plan the safe mud-weight window for drilling based on the mechanically stable mud-weight window (from breakout to breakdown pressures) and look at different wellbore deviation scenarios based on the sensitivity analysis tool in Techlog wellbore software.

Uncertainty reduction across multiple wells

Accurately predict pore pressure by using all available calibration data to significantly reduce uncertainties related to drilling. The Techlog pore pressure prediction module is fully integrated with other Techlog platform modules, such as Techlog Quanti.Elan and Techlog formation pressure, supporting the seamless use of pore pressure analyses.

Techlog pore pressure prediction incorporates industry standard methods to compute pore pressure and fracture gradients and to establish the safe mud-weight window to guide hydraulic safety. Analysis can be conducted on single wells or concurrently on multiple wells, with full Monte Carlo uncertainty.Users can plan the safe mud weight for drilling based on the mechanically stable mud-weight window (from breakout to breakdown pressures) and look at different wellbore deviation scenarios based on the sensitivity analysis tool in Techlog wellbore software.

1D to 3D geomechanics

Having performed 1D geomechanics, this data can be used to calibrate and generate a full 3D geomechanical model in the Petrel subsurface software. The simulation engine performs 3D static modeling of 4D flow-, pressure-, and temperature-coupled calculations for rock stresses, deformations, and failure. This can then be used to optimize well trajectories, predict mud-weight windows anywhere in the field, and identify potential well survivability risks that would require mitigation.

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