Geothermal drilling

The correct definition of well is

• A conduit that bring reservoir fluid to the surface

• The process to actually construct a well

• The formation where fluid is accumulated

• The formation where fluid is trapped

The correct steps in well construction

• Well Execution, Well Design, Well Engineering

• Well Engineering, Well Design, Well Execution

• Well Design, Well Engineering, Well Execution

• Well Engineering, Well Design, Well Execution

The correct process in project management:

• identify objective, generate alterantive, detail engineering, execute drilling operation, evaluate

• evaluate, identify objective, generate alterantive, detail engineering, execute drilling operation

• identify objective, detail engineering, generate alterantive, execute drilling operation, evaluate

• identify objective, detail engineering, execute drilling operation, generate alterantive, evaluate

Components of a BHA, except:

• Drill pipe

• Drill bit

• MWD/LWD

• Drill collar

Components of a wellhead, except:

• crown valve

• BHA

• expansion spool

• casing head

The correct structure of drilling string bottom up:

• drill bit, drill collar, BHA, drill string

• drill string, drill bit, drill collar, BHA

• drill string, , BHA, drill bit, drill collar

• drill string, BHA, drill collar, drill bit

When do we use top down method:

• set casing depth for exploration well

• set casing depth for development well

• set casing depth for injection well

• set casing depth for monitoring well

Basic rule in casing seat selection

• Wellbore Hydrostatic Pressure > Fracture Pressure > Pore Pressure

• Fracture Pressure > Pore Pressure > Wellbore Hydrostatic Pressure

• Fracture Pressure > Wellbore Hydrostatic Pressure > Pore Pressure

• Fracture Pressure > Pore Pressure > Wellbore Hydrostatic Pressure

How do we obtain pore pressure

• fracture gradient

• hydrostatic pressure approach

• leak off test

• bottom hole assembly

What is the maximum limit for wellbore pressure?

• pore pressure + trim margin

• pore pressure

• fracture gradient + trip margin

• fracture gradient