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Questions and Answers

Which drive mechanism is primarily used for gas reservoirs?

  • Solution Gas Drive
  • Immiscible Water and/or Gas injection
  • Pressure depletion (correct)
  • Water-drive

    • What is the purpose of tertiary recovery in reservoir development?

  • To increase the reservoir's energy (correct)
  • To reduce hydrocarbon viscosity
  • To change the flow paths
  • To improve sweep and drainage efficiency

    • Which method is NOT used in tertiary recovery?

  • Chemical flooding
  • Gas Injection
  • Horizontal wells (correct)
  • Water Injection

    • Which factor is associated with viscous fingering at high Mobility ratios?

    <p>Mobility = 2.4 (A)</p> Signup and view all the answers

    What is the range of macroscopic sweep efficiency mentioned in the text?

    <p>0.1-0.7 PV (B)</p> Signup and view all the answers

    What is the average recovery factor for the largest Norwegian oil fields?

    <p>47% (A)</p> Signup and view all the answers

    Which drive mechanism requires a reservoir in communication with an aquifer?

    <p>Water drive (B)</p> Signup and view all the answers

    What is the primary recovery factor range for solution drive?

    <p>5-30% (C)</p> Signup and view all the answers

    What is the primary recovery factor range for gas cap drive?

    <p>20-50% (D)</p> Signup and view all the answers

    What is the primary recovery factor range for water drive?

    <p>35-75% (B)</p> Signup and view all the answers

    Which method is used in primary recovery?

    <p>Depletion drive (C)</p> Signup and view all the answers

    What is the typical compressibility of gas compared to water?

    <p>Gas compressibility is lower than water (A)</p> Signup and view all the answers

    What is the gas formation volume factor (BG)?

    <p>The ratio of reservoir volume to surface volume (D)</p> Signup and view all the answers

    What is the main challenge in gas field development?

    <p>Ensuring a sustainable plateau production rate (D)</p> Signup and view all the answers

    Which drive mechanism is associated with pressure depletion in gas reservoirs?

    <p>Gas Cap Drive (A)</p> Signup and view all the answers

    Which recovery method involves changing the flow paths and fluid properties of the reservoir?

    <p>Tertiary Recovery (C)</p> Signup and view all the answers

    What is the primary recovery method that utilizes the reservoir's own energy?

    <p>Primary Depletion (A)</p> Signup and view all the answers

    Which drive mechanism requires a reservoir in communication with an aquifer?

    <p>Water drive (A)</p> Signup and view all the answers

    What is the primary recovery factor range for solution drive?

    <p>5-30% (D)</p> Signup and view all the answers

    What is the primary recovery factor range for gas cap drive?

    <p>20-50% (B)</p> Signup and view all the answers

    What is the primary recovery factor range for water drive?

    <p>35-75% (A)</p> Signup and view all the answers

    Which recovery mechanism is primarily used in the largest Norwegian oil fields?

    <p>Water drive (B)</p> Signup and view all the answers

    What is the range of pore volumes injected for different mobility ratios mentioned in the text?

    <p>0.4 to 71 (A)</p> Signup and view all the answers

    What is the average recovery factor for the 25 largest Norwegian oil fields?

    <p>47% (C)</p> Signup and view all the answers

    Which drive mechanism is commonly used for gas reservoirs?

    <p>Solution gas drive (A)</p> Signup and view all the answers

    What is the typical gas compressibility compared to water?

    <p>5x10-4 psi-1 (D)</p> Signup and view all the answers

    What is the gas formation volume factor (BG)?

    <p>The volume in barrels that one standard cubic feet of gas occupies as free gas in the reservoir. (A)</p> Signup and view all the answers

    Which gas field is currently being considered as a potential CO2 sequestration site and/or storage site for green hydrogen?

    <p>Kinsale Head (B)</p> Signup and view all the answers

    Which drive mechanism is commonly used for primary recovery in gas reservoirs?

    <p>Pressure depletion (A)</p> Signup and view all the answers

    What is the primary recovery factor range for water drive?

    <p>50-60% (D)</p> Signup and view all the answers

    What is the main challenge in gas field development?

    <p>Low permeability of gas reservoirs (C)</p> Signup and view all the answers

    Which drive mechanism requires a reservoir in communication with an aquifer?

    <p>Water drive (B)</p> Signup and view all the answers

    What is the primary recovery factor range for solution drive?

    <p>5-30% (A)</p> Signup and view all the answers

    Which factor is associated with viscous fingering at high Mobility ratios?

    <p>Mobility ratio (D)</p> Signup and view all the answers

    What is the primary recovery factor range for water drive?

    <p>35-75% (C)</p> Signup and view all the answers

    Which drive mechanism is commonly associated with pressure depletion in gas reservoirs?

    <p>Gas cap drive (A)</p> Signup and view all the answers

    What is the primary recovery factor range for gas cap drive?

    <p>50-60% (B)</p> Signup and view all the answers

    What is the purpose of tertiary recovery in reservoir development?

    <p>To improve sweep efficiency (A)</p> Signup and view all the answers

    Which drive mechanism is commonly used for oil reservoirs with an initial gas cap?

    <p>Depletion drive (B)</p> Signup and view all the answers

    Which gas field in the North Celtic Sea Basin has been used for gas storage and is currently being considered as a potential site for CO2 sequestration and/or storage of green hydrogen?

    <p>SW Kinsale (A)</p> Signup and view all the answers

    What is the typical gas compressibility compared to water?

    <p>50 times lower (D)</p> Signup and view all the answers

    What is the gas formation volume factor (BG) for gas reservoirs?

    <p>1000 rbl/scf (B)</p> Signup and view all the answers

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