Petrel Well Design

• Well Positioning
• Real-time
• Plots
• Relief Well Design and Simulation

Day 3 session will have three (3) parts.

Part 1

In drilling, collision is a familiar problem and, hence, how to detect the collision and modify the well plan effectively are very important in well design. The collision prediction is related to well positioning; whenever a well is surveyed, measurement errors from a variety of sources introduce some degree of uncertainty about the actual position of the borehole. The successful positioning of a well in an area of pre-existing wells requires:

• Geology information
• Trajectory uncertainty information
• Anti-collision scan
• No-go zone creation

In the first part of this session, the participants will be guided through the process for understanding trajectory uncertainty, calculating driller’s target, performing anti-collision analysis, generating a no-go zone and adjusting well plans based on anti-collision results and a no-go zone to minimize the risk of collision while maintaining the most practical path to the target.

Part 2

The second part of this session will be dedicated to:

• real-time data streaming in Petrel for quick decision making, risk mitigation, and intervention on a well as it is being drilled;
• the two (2) major plotting methods used by drillers for well plans: the well plan map view and the well plan vertical view.

Part 3

The final part of the course will focus on providing the participants a basic understanding of relief wells and how they are designed and validated in Petrel.

With more challenging wells being drilled that target highly productive reservoirs, it is becoming a requirement to plan relief wells before drilling operations begin. Should an incident occur, it is critical to know what is required to stop the well, how the well trajectory should be designed to intersect with a blowing well, and what rig storage and pumping capacity is required to stop the blowing well.

Relief wells are drilled for blowouts as well as to solve complex well control issues that cannot be resolved through surface intervention. And Petrel allows you to create a relief well efficiently from an existing target well, following standard procedures and using well-known constraints for the automated trajectory design. The relief well drilling simulation allows you to use the designed relief well trajectory to run a quick assessment of kill requirements from a dynamic hydraulic perspective.