Presentation on theme: "Ron Cherry, Maged Fam and Emiliano López"— Presentation transcript:
1 Ron Cherry, Maged Fam and Emiliano López Magnetic Resonance Imaging Logging, development and evolution as a fundamental evaluation tool in the reservoir managementRon Cherry, Maged Fam and Emiliano López
2 Geological & Reservoir OverviewFormation Evaluation ProblemsHigh uncertainty in reservoir evaluation using conventional Log Analysis, due to:Multilayer reservoirs made up of an average of 20 stacked layers, about 5 mt. each.Low formation water salinitySeveral water/oil and gas/light oil contacts randomly distributed throughout a rock column of mts. (average 1500 to 2500 mts.)Complex lithology (shaly and tuffaceous sand reservoirs)Different hydrocarbon types
3 Core Porosity vs Permeability Permeability (md)Core measurements on samples from about 60 wells, 800 samples from San Jorge BasinPorosity (%)Permeability (md)
4 Grain Density Vs Core Porosity Matrix Density Distribution in so called “Sandstone” from San Jorge BasinGrain Density Vs Core PorosityCore Porosity (%)Grain Density (G/c3)
5 MRI Core Porosity vs. Core Porosity San Jorge BasinMRI Core Porosity (%)Core Porosity (%)Core Porosity Vs MRI Core Porosity
6 Geometric Mean T2 Cutoff vs. Depth Geometric Mean T2 Cutoff (ms)Depth (m)Geometric Mean T2 Cutoff Vs. DepthThe high degree of variation in the T2 cutoff range may cause some inconsistencies in the final Interpretation.Thus the SBVI method is a better technique for determining BVI.
8 Core Permeability and MRI Permeability Models Vs DepthCore Permeability and MRI Permeability Models (md)Depth (m)Core Permeability and MRI Permeability Models Vs DepthN.B.: MRI Permeability data is based on SVBI model
9 Core Permeability Vs MRI Permeability Models MRI Permeability Models (md)Core Permeability (md)MRI Permeability Models Vs Core PermeabilityN.B.: MRI Permeability data is based on SVBI model
10 Reservoir Properties & MRIL Life CycleMet reservoirObjectivesSpecify ObjectivesReservoir Properties &ProblemsBoreholeConditionsSize, mud, temp….etcTest ResultsYesMRILPre-jobPlanningCompareNoDataProcessing&InterpretationPrognosisSelection of Zonesto TestSTIMRILActivationLogging speedField LogQCResistivitylogCore Analysisif available
17 Heavy OIL Detection Example ShortTELongTEUltraLongTEInitial Test Result (8hs Swabbing): 2400 L/H – 100% SWFinal Test Result (24hs Swabbing): 2400 L/H – 88% SW
18 Halliburton Question regarding details on test results Dear Customer:“…If We understand well, the formation was producing water for 8 hours before starting to produce Oil …??You have insisted to keep it producing because there was a very good signal on the MRI Ultra-Long Te activation,….. Is that correct …??...”Customer’s response“It's correct...It has been a very good news today, because up to yesterday, we couldn't believe that from that signal it would be only water... We insisted and it was 2400 l/h x 88% of water (may be the amount of water would have declined if we would wait more time... but for us it was enough seeing some oil)…”
20 Fluid Typing: GAS Flow x 12mm Wet GAS P/D 280psi P/E 1560 psi PVH990 MRI PrognosisLight OILMRI PrognosisGASFlow x 12mmWet GASP/D 280psiP/E 1560 psiPVH990MRI PrognosisGAS
21 Halliburton’s Reservoir Fluids Prognosis Sheet Based on MRIL Interpretation
22 ConclusionsMagnetic Resonance Imaging (MRI) Logs as a fundamental evaluation tool in the reservoir ManagementDetermination of Porosity, Independent to MatrixDetermination of Bulk Volume Irreducible WaterReliable Permeability Indicator (absolute after Calibration)Identify Fluid Type (Gas, Oil & Water) by zoneIdentification of Rock Quality…Permeability, Porosity & ClayDetermine variations of Hydrocarbon types (Resistivity independent)……Heavy, Intermediate, Light Oil or GasHalliburton Energy Services – Provides products, services, and integrated solutions for oil and gas exploration, development and production.Includes Sperry-Sun, Baroid Drilling Fluids, Security DBS, Dresser Oil Tools, Mono Pumps, and Westport Technology from Dresser and Drilling Systems, Logging & Perforating, Zonal Isolation, Tools, Testing & Tubing Conveyed Perforation, Production Enhancement, Completion Products & Services, Integrated Solutions, Integrated Technology Products and NUMAR from Halliburton.