Formation and Permeability Quiz
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Questions and Answers

Which of the following is the correct formula for calculating the average relative permeability of oil at connate water, (kro)Swc?

  • (kro)Swc = (krw)Soc / Relative Permeability of oil at connate water
  • (kro)Swc = Relative Permeability of oil at connate water / (krw)Soc
  • (kro)Swc = (krw)Soc
  • (kro)Swc = Relative Permeability of oil at connate water (correct)

    • What are (kro)Swc and (krw)Soc?

  • They are the relative permeability of oil and water at connate water and critical oil, respectively
  • They are the average relative permeability of oil and water at connate water and critical oil, respectively (correct)
  • They are the relative permeability of oil and water at critical oil and connate water, respectively
  • They are the average relative permeability of oil and water at critical oil and connate water, respectively

    • What is the formula for calculating the average relative permeability of water at critical oil, (krw)Soc?

  • (krw)Soc = (kro)Swc
  • (krw)Soc = (kro)Swc / Relative Permeability of water at critical oil
  • (krw)Soc = Relative Permeability of water at critical oil (correct)
  • (krw)Soc = Relative Permeability of water at critical oil / (kro)Swc

    • What is the relationship between (kro)Swc and (krw)Soc?

    <p>(krw)Soc is always greater than (kro)Swc</p> Signup and view all the answers

    What is the purpose of performing denormalization calculations in a tabular form?

    <p>To estimate representative end values</p> Signup and view all the answers

    Which of the following equations correctly calculates the average oil saturation (Soavg)?

    <p>Soavg = \frac{1}{6} \sum_{i=1}^{6} So_i</p> Signup and view all the answers

    Which of the following equations correctly calculates the average connate water saturation (Swcavg)?

    <p>Swcavg = \frac{1}{6} \sum_{i=1}^{6} Swc_i</p> Signup and view all the answers

    What is the value of the product hϕSo for sample 4?

    <p>1924</p> Signup and view all the answers

    What is the value of the product hϕSwc for sample 5?

    <p>2492.8</p> Signup and view all the answers

    What is the average value of the product hϕSo for all samples?

    <p>\frac{1}{6} \sum_{i=1}^{6} h_i * \phi_i * So_i</p> Signup and view all the answers

    Which of the following is an example of a process that involves the displacement of the original water of deposition by hydrocarbon in water-wet rock?

    <p>Waterflooding an oil reservoir in which the reservoir is oil wet</p> Signup and view all the answers

    Which of the following is an example of a process that involves the accumulation of oil in an oil wet reservoir?

    <p>Accumulation of condensate as pressure decreases in a dew point reservoir</p> Signup and view all the answers

    Which of the following is an example of a process that involves the increase in saturation of the wetting phase?

    <p>Hydrocarbon filling the pore space and displacing the original water of deposition in water-wet rock</p> Signup and view all the answers

    Which of the following is an example of a process that involves the decrease in permeability?

    <p>Accumulation of condensate as pressure decreases in a dew point reservoir</p> Signup and view all the answers

    Which of the following is an example of a process that reflects reservoir quality?

    <p>Gas injection in an oil or water wet oil reservoir</p> Signup and view all the answers

    Which of the following is an example of a process that involves the displacement of the original water of deposition by hydrocarbon in water-wet rock?

    <p>Hydrocarbon filling the pore space and displacing the original water of deposition in water-wet rock</p> Signup and view all the answers

    Which of the following is an example of a process that involves the increase in saturation of the wetting phase?

    <p>Imbibition process</p> Signup and view all the answers

    Which of the following equations correctly calculates the average oil saturation (Soavg)?

    <p>$Soavg = \frac{\sum{h \cdot \phi \cdot So}}{\sum{h \cdot \phi}}$</p> Signup and view all the answers

    Which of the following equations correctly calculates the average connate water saturation (Swcavg)?

    <p>$Swcavg = \frac{\sum{h \cdot \phi \cdot Swc}}{\sum{h \cdot \phi}}$</p> Signup and view all the answers

    What is the value of the product hϕSo for sample 4?

    <p>20</p> Signup and view all the answers

    Study Notes

    Relative Permeability and Saturation Concepts

    • The average relative permeability of oil at connate water is denoted as (kro)Swc.
    • (kro)Swc represents the relative permeability of oil when water saturation is at its connate level.
    • (krw)Soc is the relative permeability of water at critical oil saturation.
    • Average relative permeability of water at critical oil saturation can be calculated using the formula for (krw)Soc.

    Relationship Between Oil and Water Relative Permeability

    • There exists a direct relationship between (kro)Swc and (krw)Soc, which influences fluid flow behavior in reservoirs.

    Denormalization Calculations

    • Denormalization calculations serve to convert normalized data back to original units for better interpretation and analysis in tabular format.

    Average Saturation Calculations

    • To find average oil saturation, the corresponding equation is essential for accuracy (Soavg).
    • The calculation of average connate water saturation requires its specific equation (Swcavg).

    Product Calculations in Samples

    • The product of hϕSo for sample 4 derives specific oil saturation characteristics within that sample.
    • hϕSwc value for sample 5 informs on the connate water characteristics in the respective sample.
    • Calculating the average value of hϕSo across all samples provides an overall estimate of oil saturation.

    Process Examples in Reservoirs

    • Displacement of original water of deposition by hydrocarbon is typical in water-wet rock.
    • Accumulation of oil within an oil-wet reservoir showcases characteristics of that specific rock type.
    • Processes involving the increase in saturation of the wetting phase can impact reservoir performance.
    • Decrease in permeability reflects changes that can affect fluid movement and reservoir quality.
    • Various processes contribute to determining overall reservoir quality, affecting resource extraction viability.

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    Related Documents

    Reservoir Rock Mechanics Relative Permeability PDF
    Reservoir Rock Mechanics Saturation PDF
    Reservoir Rock Mechanics, Boundary Tension & Wettability PDF

    Description

    This quiz tests your knowledge on different types of formations, including unconsolidated sand (well sorted and poorly sorted) and cemented sandstone. It also covers relative permeability correlations. Test your understanding of these topics and improve your knowledge in the field.

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