Multilateral junction stability analysis

Overview

Gain a clear understanding of loads and stresses on the multilateral junction during drilling with multilateral junction stability analysis services from GaffneyCline™ energy advisory.

Using Finite Element (FE) simulation techniques, our modeling experts build a model containing finer mesh elements at the junction. This mesh is populated with pore pressure and rock properties based on a calibrated, 1D geomechanical model of the well.

We then carefully analyze the model outputs to determine the optimal drilling conditions that maintain junction integrity. This analysis includes:

• Comparing simulated stress conditions to pre-specified failure criteria to assess the mud weights required to keep the junction stable.
• Simulating strain evolution around and on the junction.
• Quantitatively assess the potential risk of junction collapse by comparing simulated plastic strain to a threshold value.
• Performing sensitivity analyses to assess the stress interference and the safe distance between the sidetrack and the main borehole to reduce junction collapse risks.
• Conducting a junction integrity analysis at critical depths along the main wellbore to determine a safe casing location for milling out a window.
• Investigating how effective stress ratios around and on the junction vary with changes to other geometrical parameters.

Ultimately, our multilateral junction stability model provides far-reaching benefits to the safety and efficiency of your drilling program. Use the simulation results to improve your exit strategy by optimizing mill-out direction (tool-face), kick-off angle (inclination), and dogleg severity. The model also serves an integral role in solids production analysis—a requirement for developing effective debris management strategies.

Contact your Baker Hughes representative to learn how GaffneyCline energy advisory’s analytical expertise can help ensure a robust, reliable multilateral junction in your wells.

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