Presmod adds a new dimension to drilling hydraulics by including dynamic temperature calculations in the hydraulic model. Presmod offers the user an easier and more exact evaluation of how the operational conditions and critical fluid properties influence pressure (ECD) and temperature conditions in the well.

Key features

• Hydraulic design
• Operational forecasting
• Interpretation of downhole pressure and temperature readings (PWD)
• Development of operational guidelines
• Development of operational guide-lines in critical wells
• Calculation of equivalent static and circulation density (ESD & ECD)
• Calculation of temperature profiles for different operational conditions
• Calculations of thermal expansion effects
• Calculation of fluid properties vs. depth

Challenge
Lack of hydraulic power to reach the target in an ERD well, fracturing the formation with large mud losses and frequent kick incidents are only a few examples of very costly problems that can be reduced through proper planning with the correct tool.

Drillbench Presmod is a hydraulic software program used worldwide by drilling engineers to help in their decision-making processes. Presmod allows the engineer to design and plan operations within the simulator and thus prepare for reality. The parameters used in normal operations (i.e., circulation, rotation, drilling) can all be altered to reproduce real operational situations. Critical parameters can be visualised at several locations in the well through the flexible graphics.

The combination of accurate modelling, the graphical presentation and the ability to simulate are of special importance whenever the design margins decreases. It is well known that in advanced wells like HPHT wells, deep water wells, extended reach wells, wells in depleted reservoirs or in areas with gas or water injection, the margins between pore pressure and fracture pressure may be small. In the future, the drilling targets will probably be even more difficult. Drilling advanced and complicated wells requires an extra planning effort. Presmod can be used to simplify this planning process and it allows the drilling engineer to make better decisions.

Solution
Drillbench Presmod adds a new dimension to drilling hydraulics by including dynamic temperature calculations in the hydraulic model. This software program is a result of extensive R&D performed at Rogaland Research within flow modelling of non-Newtonian fluids. Presmod offers the user an easier and more exact evaluation of how the operational conditions and critical fluid properties influence pressure (ECD) and temperature conditions in the well. By using Presmod in the planning stage of the well, the drilling engineer will be able to monitor the processes that occur, thus allowing the user to supervise that the well conditions will meet the design requirements throughout the operations.