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12 Week Subsurface Mapping And Interpretation Technique Building
 

12 Week Subsurface Mapping And Interpretation Technique Building

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Final Presentation for 12 week hand mapping class.

Final Presentation for 12 week hand mapping class.

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    12 Week Subsurface Mapping And Interpretation Technique Building 12 Week Subsurface Mapping And Interpretation Technique Building Presentation Transcript

    • 12 Week Subsurface Mapping and Interpretation Technique Building Laying The Theoretical Foundations And Introducing Techniques To Explore For And Develop Oil And Gas Fields. Joe Dumesnil
    • Special thanks to: Dr. Stewart Chuber of Fayette Exploration Company AAPG Foundation The friends I have made while here including the entire SCA Company staff and its Partner-Instructors
    • First 6 Weeks Devoted to Classes
      • Theories and Fundamentals of Structural Geology, Stratigraphy, Mapping, Seismic Acquisition and Processing.
      • Classes Included:
        • Structural Styles in Petroleum Exploration and Development
        • Open Hole Log Analysis
        • Seismic Survey Design, Acquisition and Processing
        • Principles of 3-D Seismic Interpretation
        • Applied Subsurface Geological Mapping
        • Basic Reservoir Engineering
        • Fundamentals of Seismic Stratigraphy
    • Second 6 Weeks Devoted to Application of Tools Learned on a Hypothetical Lease
      • Phase 1
        • Initial Exploration, Delineate Prospects, Drill Wildcat
      • Phase 2
        • Assess Discovery – Refine Interpretation
      • Phase 3
        • Field Development - Refine Interpretation Further
        • Explore for additional Prospects on the Lease
      • Phase 4
        • Field Performance Analysis
    • Dip Line - 5
    • Lead Map – Depth Structure of Frio A Top Note: 1. Line 5 2. Well Tops from previous dry holes
    • Refined Prospect Depth Structure & Volumetrics 950 Acres 12,350 Ac-Ft 13.561 BCF and 624 MBO Note: Engineering Parameters from Analogous Fields were used for Calculations 13’ Ft Pay, 50% Sw, 24.9 Porosity, 2% Attic, 46B/MM, P-intial 4700 psi, P-abandonment 1000psi, Recovery: 1098 MCF/Ac-Ft
    • Data Provided after drilling SR #1
      • 1” Logs
      • Type Log (provided earlier)
      • 5” Log (SP, Resistivity and Acoustic)
      • Core Data (Core Labs Inc.)
      • Synthetic Seismogram
    • Time Structure Top Frio A
    • Depth Structure Top Frio A
    • Fault Surface Map after finding a Bifurcator to the Main Fault
    • Velocity Gradient Map Integrated with times of a seismic event to get a better approximation of depth structure.
    • Well Data Stencil Time Conversion from Depth (Frio A, J, U) Depth of Surface (Frio A, J, U) Fault Cuts in Time and Depth
    • Net Sand Map
    • Isochore Mapping of Western Frio A Prospect
      • Hand Drawn Version
      • Computer Version with Volumetrics
      1055 Acres 13,715 Ac-Ft 20.089 BCF 904 MBO Note: 13’ Ft of Pay, 40% Sw, 26.5%, 2% Attic, 45 B/MM, P-intial 4650 psi, P-abandonment 1000 psi, Recovery: 1,465 MCF/Ac-Ft
    • Structural X-Section across Main Fault
      • Condensed X-section to determine Fault Termination.
      • Generalized Relative Scale of Strata for extrapolation below TD of wells.
    • Stacks of Data Are there more Prospects on our Lease? Remaining 5 of 15 Lines of Seismic in the Area Integrate all Logs to Structural Interpretation
    • Fault Cuts taken from Seismic lines with Naming Convention Frio A
    • Updated Fault Surface Map After Receiving All Available Seismic Note that only faults pertinent to the fault blocks that we are prospecting in are included.
    • 1. Shot Points at which certain faults occur on specified lines. 2. Grid to loop tie Frio A Seismic Event across entire Seismic Grid
    • Time Structure Top of Frio J
    • Time Structure of Top Frio U
    • Eastern Frio A Prospect Depth Structure
      • Hand Drawn Version
      • Computer Version with Volumetrics
    • East of Bifurcator – 1 Time Structure for Top of Frio J
    • East of Bifurcator – 1 Frio J Prospect
      • Gamma Ray and Resistivity from BTL #19 used to make:
      • Net Sand Approximation
      • Net/Gross Ratio
    • East of Bifurcator – 1 Time Structure for Top of Frio U
    • Eastern side of Bifurcator – 1 with a Frio U Prospect
      • Gamma Ray and Resistivity from BTL #19 used to make:
      • Net Sand Approximation
      • Net/Gross Ratio
    • Proposed Deviated / Directional Well Multiple Payzones In The Frio Frio A: ~10,000 Ac-Ft Frio J: ~11,000Ac-Ft Frio U: ~8500 Ac-Ft
    • Geologic Risk Factors for the Deviated Step Out Exploration Well
      • Frio A
        • Trap Geometry – 90% (10% for the Fault Communication)
        • Source – 100%
        • Migration – 100% (Show in BTL #19)
        • Timing – 100%
        • Seal – 40% (Seal Analysis on 3 Faults)
        • Reservoir – 90% (Pnding Facies changes affecting porosity and perm)
        • Preservation – 95%
          • POS = 30.78%
    • Geologic Risk Factor cont.
      • Frio J and U
        • Trap Geometry – 85% ( Syncline to Transition Ramp in U?)
        • Source – 100%
        • Migration – 60% (Producing Fields to East, none to the West)
        • Timing – 90% (Find field with analogous fault timing)
        • Seal – 50% (Seal Analysis on 3 Faults)
        • Reservoir – 90% (Pending Facies changes affecting porosity and perm)
        • Preservation – 95%
          • POS = 19.62%
    • Stratigraphic Framework
    • 3 rd and 4 th Order Sequence Stratigraphy
    • Beach Barrier / Strandplain Complex Zone of Frio Growth Fault Expansion -7000 GENERAL AREA OF PROJECT -7000
    • Thank You All Again, Especially, Dr. Stewart Chuber and The AAPG Foundation Questions?
    • Final Base Map (with all wells that were drilled into the block)