HPHT Wells
Who Should Attend:
Geologists, Geophysicists, Petroleum and Drilling Engineers. Some wellsite or operations experience and a basic knowledge of geology are beneficial for this course.
Objectives:
(This course is also suitable for the IWCF Well Control – Level 5)
To explore the challenges of drilling and evaluating HPHT wells. Students will learn about well planning processes, the drilling and geological challenges presented by HPHT wells and explore pore pressure detection processes, rock fracture pressure and ECD requirements and well control procedures. Rig types and casing design methods will be explored.
Content:
- HPHT definition
- Well Planning Processes
- Formation pressure evaluation: Origin of abnormal pressures
- Pressure Transition Zones: A critical design factor
- FIT consideration
- Casing seat selection, rock properties
- Kick tolerance with temperature and Z correction
- Drilling window/ECD
- Gas behavior
- Rig equipment layout
- Sour gas and sweet gas consideration: H2S;CO2
- Special casing grades
- Casing wear consideration
- HPHT casing design
- Trapped annulus pressure
- Drilling HPHT wells with OBM muds
- Effects of P/T on mud properties
- Effects of gel strength
- Breathing and ballooning
- Swab and surge pressure profiles
- ECD variation with depth
- Barite sag
- Drilling practices
- Tripping procedures
- Gas handling, capacities and procedures
- Degasser design
- Kicks and well control
- Well Control Equipment
- Cementing consideration
- Hydrates
- Well testing considerations
- Exercises
