Lesson 2

1. Lesson 2 Rheology of Drilling and Completion Fluids

2. Harold Vance Department of Petroleum Engineering Rheology of Drilling and Completion Fluids Functions of Drilling/Completion Fluids Fluid Types, Fluid Models Introduction to Rotary Viscometer Other Testing Equipment Objectives of Monitoring Fluids

3. Harold Vance Department of Petroleum Engineering Rheology of Drilling and Completion Fluids Read: MI Chapters 1, 2, 3, & 5 Watch: Multimedia program 3 & 4

4. Harold Vance Department of Petroleum Engineering Functions of Drilling/Completion Fluids Remove cuttings from the well. Control formation pressures. Suspend and release cuttings. Seal permeable formations.

5. Harold Vance Department of Petroleum Engineering Functions of Drilling/Completion Fluids Maintain wellbore stability. Minimize reservoir damage. Cool, lubricate, and support the bit and drilling assembly. Transmit hydraulic energy to tools and bit.

6. Harold Vance Department of Petroleum Engineering Functions of Drilling/Completion Fluids Ensure adequate formation evaluation. Control corrosion. Facilitate cementing and completion. Minimize impact on the environment

7. Harold Vance Department of Petroleum Engineering Fluid Types, Water based Oil based Air Mists Foams

8. Harold Vance Department of Petroleum Engineering Flow Regimes Plug Flow Flat flow profile Velocity at walls is almost the same as in the middle Low velocities, and high viscosities