Lecture 6 5 Inflow control Scheduled 14 october

Lecture 6. 5: Inflow control Scheduled: 14. october Abstraction of Chapter 6. 5 Liner outlet performance Chapter 6. 4. 4 Dynamic Bernoulli valves

Part 1 Liner outlet performance Ref. Lecture 6. 4: Inflow control provides robustness

«Inflow performance» chapter 1 : • Example: Training exercise 1 • Inflow performance (here: black) • Tubing performance (here: blue)

«Inflow performance» • Well completion assumed:

Liner completion • Completion assumed • Liner outlet performance:

Liner outlet performance: • Negligble pressure loss along liner traditional • With inflow control (assuming homogenous reservoir and no IC at toe)

Liner outlet performance Without inflow control • Ref. equation (6 -9) • general • At heel • Liner outlet performance and:

Liner outlet performance: Comparison

Optimization of Inflow Control • Desision variables: ICD-type, dimensioning, location • Objective: Oil-gas production • Objective 2: Robustness • Constraints: Flow relations, valve performance

Part 2: Dynamic Bernoulli valves • valves with parts moved by flow forces

Dynamic Bernoulli valves Aakre & Mathiesen 2008 (patent date) «Rate Controlled Production (RCP)» • Valve design • Calibration formula:

Dynamic Bernoulli valve: analytic tratment Flow and pressure forces acting on loose plate View from above

Dynamic Bernoulli valve • Pressure distribution • Force balance valve opening pressure drop

Analytic/experimental results: (Sørheim, Askvik, Asheim al 2018): Liquid performance Robustness relations: Gas performance: Oscillations (here approx. E&C#) , ,