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Getting through complex cover to basement

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Page 1: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Getting through complex cover to basement

Page 2: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 3: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

• First Drilling

– Surface and Underground drilling contractor

–Main operations in Australia and North America

Page 4: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

A short History of exploration

drilling in the Eucla Basement

Source: Colcrete - Eurodrill

Source: Keely & Boateng (1987)

Page 5: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Getting There

Page 6: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 7: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 8: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Critical Setup

Page 9: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 10: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 11: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Drilling Fluid Program

Target Fluid Properties

Mud Weight 1.00 – 1.05 Sg

Viscosity 40 - 45 sec / quart

Filtrate < 20 ml / 30 min

Filter cake 0.5 - 1.0 mm

pH 8.0 – 9.5

Page 12: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

Page 13: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

What to be aware of

Page 14: Getting through complex cover to basement...Drilling Fluid Program Target Fluid Properties Mud Weight 1.00 –1.05 Sg Viscosity 40 -45 sec / quart Filtrate < 20 ml / 30 min Filter

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