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Experimental Study of Effect of Capillary Pressure on Archie Parameters for one of Iranian Petroleum Rock

Hasani Ahmadzadeh, Peyman | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39650 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Masihi, Mohsen
  7. Abstract:
  8. The most fundamental concept in considering electrical properties of reservoir rocks are formation Resistivity factor and Resistivity index which are defined by Archie and are useful in interpretation of well logging, evaluation of porosity and saturation. A theory on the relationship between formation resistivity factor and porosity, also resistivity index and saturation are presented by use of parameters Cementation factor and Saturation exponent. The Archie equation is valid only when the rock is strongly water-wet and clay free, which is not the case in carbonate rocks. Therefore the Archie equation cannot be generalized over the entire carbonate reservoirs. On the other hand influence of environmental situations and rock properties, such as confining pressure, temperature, wetability and capillary pressure on Archie parameters, spatially in carbonate rocks, are very important to estimate correct hydro carbon in place. In this project, series of experiments are performed in order to find influence of imbibition and/or drainage on Archie parameters by changing wettability, for carbonate rocks of one of Iranian petroleum reservoir. These esperiments are shown saturation exponent value is decreas by wettability alteration of rock samples from oil wet to water wet.

  9. Keywords:
  10. Capillary Pressure ; Carbonate Resrevoirs ; Wetting ; Cementation Factor ; Resistivity Factor ; Resistivity Index ; Saturation Exponent

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