Instructor
Dr. H. Rabia
Objectives
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, pore pressure detection processes, rock fracture pressure, ECD requirements, and well control procedures. Rig types and casing design methods will be explored.
Audience
Geologists, Geophysicists, Petroleum and Drilling Engineers. Some wellsite or operations experience and a basic knowledge of geology are beneficial for this course.
Course Content
- HP/HT Drilling: Definitions
- HPHT Profiles and History: Temperature and Pressure
- HPHT Incident Statistics
- Drilling Window/ECD
- Formation Pressure Evaluation
- FIT Consideration
- Casing Seat Selection
- Hydrocarbon Phase Behaviour
- Gas Solubility
- Gas Behaviour under HPHT Conditions
- Kick Tolerance
- Casing Design for HPHT Wells
- Sour Gas Consideration, Special Casing Grades
- Casing Wear Consideration
- Well Control Equipment
- General Rig Equipment Layout
- Down-hole Equipment
- Degassers
- Mud Types
- Effects of P/T on Mud Properties
- Effects of Gel Strength
- Breathing and Ballooning
- Swab and Surge Pressure Profiles
- ECD Against Depth
- Barite Sag
- Tripping Procedures
- Actual Examples from North Sea Wells
- Cementing Consideration
- Well Testing Consideration
- Well Completions
- Exercises
