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Introduction to some basics


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To explain some basics of reservoir characterization

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Introduction to some basics

  1. 1. A New Approach in Hydraulic Flow Unit Determination and its Application for Prediction of Petrophysical Properties By: Mohammad Izadi Supervisor: Dr Ali Ghalambor
  2. 2. Contents: 1) Introduction 2) Literature Review 3) Approach 4) Scope of the work
  3. 3. Introduction: A New Approach in Hydraulic FlowHydraulic Flow UnitUnit Determination and its Application for Prediction of Petrophysical PropertiesPetrophysical Properties
  4. 4. Introduction: Definitions……… Reservoir Characterization Rock Typing Hydraulic Flow Unit
  5. 5. Reservoir Characterization An integration of available data to define the geometrygeometry, distributiondistribution of physical parameters and flow propertiesflow properties of a petroleum reservoir. Available Data Time Cum P
  6. 6. Rock Typing Archie (1950): Units of rock deposited under similar conditions which experienced similar diagenetic processes resulting in a unique porosity- permeability relationship, capillary pressure profile and water saturation for a given height above free water in a reservoir.
  7. 7. Rock type categories: - Depositional: Rock types according to similarities in compositions, texture, sedimentary structure and stratigraphic sequence as influenced by the depositional environment. - Petrographic: Rock types based on microscopic imaging of pore structure as well as texture and composition, clay mineralogy, and diagenesis.
  8. 8. - Hydraulic: At pore scale level, those rock types according to the physical flow and storage properties of the rock relative to the native fluid as controlled by the dimensions, geometry and distribution of the current pore and pore throat structure. Hydraulic Flow UnitHydraulic Flow Unit
  9. 9. Rock typing procedure: Large scale Pore scale 1) Basin Analysis ( depositional environment, sand body geometry by core) 2) Physical core description to evaluate texture, composition, lithology and diagnosis 3) Routine and special core analysis to end up with pore and pore throat size
  10. 10. Hydraulic Flow Unit Volume of the total reservoir rock within which geological and petrophysical properties that affect fluid flow are internally consistent. Rock type
  11. 11. Literature Review * Ebanks (1987) defined the fundamental concepts of flow units * Slatt and Hopkins (1990), Ahr (1991), and Stoudt et al. (1992) used qualitative techniques, to define flow units. *Amaefule et al. (1993) did comparative studies and proposed a common method for determination of hydraulic flow units
  12. 12. Literature Review (Cont.) * Gunter et al. (1997) reported Lorenz plot to define hydraulic flow units ( plot of percent flow capacity versus percent storage capacity of every stratigraphy sequence) Many authors proposed different methods based on Amaefule model and concluded various results.
  13. 13. Approach In this work, we propose a approach to hydraulic flow unit identification using common Amaefule method. Amaefule or FZI method: FZIRQI zφ= Reservoir Quality Index Normalized Porosity Flow zone indicator
  14. 14. Approach (Cont.) ( ) 1 0.0314 1 e e e s gv k F S φ φ φ τ   =   −   RQI Normalized Porosity FZI S gv : surface area per unit grain volume sF τ : Kozeny term
  15. 15. Approach (Cont.) How to get to the approach? Mathematical Modeling: It will be formulated according to Amaefule approach with Different Boundary Condition but same assumptions. In another word, a new term will be defined and mathematically obtained.
  16. 16. Scope of the work: 1)Mathematical Modeling ( Done) 2)Experiments ( Routine and Special Core Analysis) 3)Validating with experiments? 4) Up scaling with well log suite
  17. 17. Thank you Questions???