Well Planner Trajectory Designer

The Well Planner Trajectory Designer will be responsible for designing and maintaining directional and horizontal well trajectories, performing anti-collision analysis, managing survey requirements, and supporting high-volume well planning activities. The role requires strong expertise in wellbore positioning, trajectory optimization, survey QA/QC, and drillability assessment, while working closely with Drilling Engineering, Subsurface, Survey, and Directional Drilling teams.

• Design horizontal and directional well trajectories, including build-and-hold, S-curve, modified-S, and catenary profiles.
• Calculate and optimize build/drop/turn rates, dogleg severity, landing geometry, and lateral placement.
• Perform anti-collision analysis using ISCWSA error models, Separation Factor (SF), Ellipse of Uncertainty (EOU), and closest-approach assessments.
• Develop survey programs and perform survey QA/QC, including Multi-Station Analysis (MSA).
• Evaluate requirements for geomagnetic corrections and gyroscopic surveys.
• Update trajectories based on geological target changes, drilling constraints, and anti-collision risks.
• Support trajectory drillability assessment using torque, drag, hydraulics, casing wear, and BHA considerations.
• Maintain validated definitive surveys and offset-well information.
• Prepare trajectory, survey, anti-collision, and engineering handover packages.
• Manage multiple concurrent well plans in multi-well pad, high-volume drilling environments.
• Maintain plan version control and engineering documentation.

• Landmark COMPASS or equivalent well planning anti-collision software.
• KM ERA or equivalent well engineering tools.
• Landmark WellPlan or equivalent torque, drag, hydraulics applications.
• Strong knowledge of ISCWSA error models and wellbore positioning.
• Understanding of Minimum Curvature Method, DLS, Separation Factor, EOU, MWD surveys, gyro surveys, and survey uncertainty.
• Excel, Power BI, Spotfire, and document-management tools.
• Python/VBA automation experience is an advantage.

• Bachelor's degree in Petroleum, Mechanical, Geosciences, or a related technical discipline.
• 7 years of experience in well planning, trajectory design, directional drilling, or wellbore positioning.
• Hands-on experience designing horizontal and directional wells.
• Experience with anti-collision analysis and survey management.
• Experience supporting multi-well pad or high-volume drilling programs preferred.
• Field exposure to directional drilling, MWD/LWD, BHA behavior, and survey operations is desirable.
• Strong analytical, technical documentation, and communication skills.
• Trajectory Design, Wellbore Positioning, Anti-Collision, Survey QA/QC, Directional Drilling, Torque & Drag, Drill ability Assessment, Multi-Well Planning, Technical Documentation.