Manfred Eigner ME Consultancy Services

1. Manfred Eigner ME Consultancy Services Drilling Fluids

2. Drilling Fluids Technology • Course Objectives • Water & Oil based Drilling Fluids • Formation damage • Deep Water considerations • HP & HT systems • Mud program

3. Drilling Fluids Technology Course Objectives At the end of this course,YOU will be able to: • Define drilling fluids applications • Understand the formation damage • Define different mud systems • Understand deep water considerations with drilling fluids • Manage a drilling fluid program.

4. Section 1 Water & Oil based Drilling Fluids

5. Functions & Properties Introduction Drilling fluid is the lifeblood of drilling operations and defined as : • Circulating fluid • Drilling fluid Drilling fluid technology is dominated by three factors : • Performance • Economics • Environmental concerns

6. Functions & Properties Drilling Fluid Technology • The principal task of the drilling fluid is • To contribute to the success of the well construction • The drilling fluid will emphasize on : • Reservoir evaluation • Well Productivity • Hydrocarbon and Gas Recovery

7. Question-1 • List the Functions of a Drilling Fluid • Which ones are important for Well Control?

8. Functions & Properties • Basic functions • All basics drilling fluids functions can be split into 3 main area’s • Control subsurface Pressures • Avoid damage to productive zones • Promote Hole cleaning • Sometimes priorities may change depending on the goals and conditions of the drilling operations • Mud lubricity, low toxicity will be adapted to drilling operations

9. Properties • Rheology • Viscosity • Shear Stress : Unit : Lb / 100 ft 2 • Force causing the shearing • Surface of the platelet • Shear rate : Unit : 1 / sec ( reciprocal second) • Difference of velocity between 2 platelets • Distance between 2 platelets