Status of Task 1(Monitoring)

March 27 - 30, 2001 - Milan, ItalyMarch 27 - 30, 2001 - Milan, Italy

Task 1 - Monitoring

• Monitoring Methods

• Conventional methods completed

• Need to add fiber optics

• Need to finalize PLTs• Need to improve

fractured monitoring• Need to incorporate

specific Best Practices –suggestions?

Task 1 – Monitoring Methods• Falloff

– Introduction discussing differences between production and injection

– Mobility– Injectivity and falloff definitions– Analytical relationships– Analogs to buildup testing– Injectivity – liquid-filled, unit

mobility– Falloff – liquid-filled, unit

mobility

Task 1 – Monitoring Methods• Falloff

– Multiple-rate testing– Injection – Non-Unit Mobility– Falloff – Non-Unit Mobility– Example Falloff – Non-Unit

Mobility– Example Falloff – Two-Rate

(needs to be completed)– Fractures – needs to be

completed– Have analyzed Elf and Maersk

data and need to include it in the Best Practices.

Task 1 – Monitoring Methods• Average Reservoir

Pressure– Why is it important?– How is it determined?

Analytical methods are shown even though software or reservoir simulation might and should be carried out because of the complexity of well interactions.

– Generic example shown highlighting false pressure.

- Add example from provided field data - e.g. Phillips’ examples – already processed

Task 1 – Monitoring Methods

• Hall Plots– Introduction– Theory– Simplified Version to be avoided– Modified Hall Plot– Add Heriot-Watt developments and example.– Horizontals– Fractured– Meaning of the Slope– Applications– Add Advantek moving average considerations

as a supplement or a separate method.

Task 1 – Monitoring Methods• Step Rate Testing

– Has been presented previously

– New Statoil data to be included

– Include some previously processed Maersk data

Task 1 – Monitoring Methods

• Pulse Testing– Basic Theory for Single and Multiple Pulses– Designing a Pulse Test

Task 1 – Monitoring Methods

• Interference Testing– Basic Theory is given even though you would

probably use simulation– Single injecting well and a monitoring well– Two well interference with flow/injection– Analysis– Precautions– References

Task 1 – Monitoring Methods

• Drillstem Testing

– Very brief overview only

Task 1 – Monitoring Methods

• Hydraulic Impedance Testing– Has been previously discussed.

Task 1 – Monitoring Methods

• Production Logging Testing– Needs to be written.– Include fiber optics here.

Task 1 – Monitoring Methods

• Conventional Leakoff Testing

• Extended Leakoff Testing

• Micro-Hydraulic Fracturing

Task 1 – Monitoring Methods

• Tiltmeters– Contacts– Introduction– Surface Systems– Examples– Downhole Systems– Additional

References

Task 1 – Monitoring Methods• Microseismic Monitoring

– Contacts– Introduction– Placement of Receivers– Limitations

– Interpretation– Field Examples– Methodology– Additional References

Task 1 – Monitoring Methods

• Real-Time Diagnostics– For acidizing – done– For fracturing – in progress

Task 1 - Monitoring

• Fracture Models– Audit and Summary Completed– Navigation in the ToolBox needs to be

improved– Add “high-level” comparison to Best

Practices– Any missing models? Yes – are being

added

Task 1 - Monitoring

• Well Performance • Prepared introductory level presentation on Well Performance for Injectors

• Radial flow completed

• Wellbore Hydraulics Completed – more on restrictions

• Completions

Task 1 - Monitoring

• How is this integrated into the Best Practices Site.

• Currently is in Operational Considerations and Performance

• Needs further tie in with radial flow models and with models that are functional for soft formations.