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Repeated Formation Testers
- 1. Omar Anwar ElGanzoury KirelosSaad Samir REPEATED FORMATION TESTER
- 2. History of theWLFT Production WL WL Formation Testers Formation Testers “ FT “
- 3. History of theWLFT
- 4. History of theWLFT Production WL WL Formation Testers Formation Testers “ FT “ Repeated Formation Testers “ RFT
- 5. History of theWLFT
- 6. History of theWLFT Production WL WL Formation Testers Formation Testers “ FT “ Repeated Formation Testers “ RFT “ Modular Formation Dynamics Tester “ MDT “
- 7. History of theWLFT
- 8. Wireline Formation Testers Pressure Measurements Formation FluidSamples Pressure Profile Why Wireline Formation Testing?
- 9. Formation Testers VSDrill Stem Performance Attribute WL Formation Testers Drill Stem Test Uses Exploration, Appraisal, Development & Production. Exploration & Appraisal only. Open hole only. Open hole and cased hole. Reservoir Pressure Data Across productive zone. At exact datum only. PVT Sampling At reservoir conditions. Surface data. Formation Permeability Data Better vertical permeability Better areal permeability Performance Time Fast Slow Deployment method Wireline Drill string cost low high HSE concerns low high
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- 11. Standard RFT ToolOperation Performed in Open Hole Wireline formation tester. (a) Retracted configuration (tool closed). (b) Set configuration (tool set).
- 12. Standard RFT ToolOperation Modes of Measurement Pretest Measurement Fluid Sample Measurement
- 13. Dual pretest formationtester sampling system.
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- 15. Analysis of PressureMeasurement
- 16. A Initial Pressure Compression Effect B FirstChamber C Chamber full D E Second Chamber F Both Chambers are full G Final pressure reading
- 17. Analysis of PressureMeasurement STUCK TOOL PLUGGING SEAL FAILURE TIGHT TEST MEASUREMENT PROBLEMS
- 18. Analysis of PressureMeasurement Depletion Profile Uses Development Reservoir Connectivity Reservoir Quality
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- 21. The pressures aregiven in analogue and digital form.
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- 23. RFT Data Interpretation Whatwe get from interpreting pressure profiles 1. Diagnosing fluid-contact levels. 2. Identifying pressure transition-zone intervals. 3. Mapping reservoir fluid nature and trends and compartmentalization of res ervoir.
- 24. RFT Data Interpretation Distinguishfluid-contact levels and transition-zone intervals The density of the fluid represented by a line ρfluid = 1/(9.81*G).
- 25. RFT Data Interpretation Distinguishfluid-contact levels and transition-zone intervals
- 26. RFT Data Interpretation Seal Reservoir Transitionzones Distinguish fluid-contact levels and transition-zone intervals
- 27. RFT Data Interpretation VerticalBarriers
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- 33. Estimation of FormationPermeability ∆P= (Cμq/2πrpkd) ∆(1-rp/re) Where: ∆P is the drawdown pressure. C is the geometric shape factor for flow. q is the flow rate, cm/s. μ is the viscosity of the fluid, cp. rp is the effective probe radius, cm. re is the outer radius of investigation of the flowing field, cm. kd is the effective permeability
- 34. Estimation of FormationPermeability Kd=Cμq/2πrp∆P We can simplify the equation when rp is very small compared to re Kd= c∆μq/∆P We can simplify the equation when rp is very small compared to re
- 35. Estimation of FormationPermeability Reason of spurious data points reservoir heterogeneity over pressuresupercharging
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