Quiz 5.pdf

Reservoirs and Oilfield Production Answers 1. Which of the following is a selected petroleum province of NW Europe? A. The North Sea B. Cretaceous chalk reservoir system C. Paleogene turbidite system D. The Permo-Triassic Rotliegend system Answer: The North Sea (A) The selected petroleum provinces o...

Reservoirs and Oilfield Production Answers 1. Which of the following is a selected petroleum province of NW Europe? A. The North Sea B. Cretaceous chalk reservoir system C. Paleogene turbidite system D. The Permo-Triassic Rotliegend system Answer: The North Sea (A) The selected petroleum provinces of NW Europe mentioned in the text include The North Sea, The PermoTriassic Rotliegend system, the Jurassic Brent system, and the Cretaceous chalk reservoir system. 2. Which type of reservoir is mentioned in the text? A. Cretaceous chalk reservoirs B. Jurassic Brent system C. Paleogene turbidite reservoirs D. Permo-Triassic Rotliegend system Answer: Paleogene turbidite reservoirs (C) The text mentions Paleogene turbidite (deep-water deposit) reservoirs as one of the examples of petroleum provinces in NW Europe. 3. Which basin is associated with the Corrib Field? A. Erris Basin B. Slyne Basin C. Druid/Drombeg Basin D. Porcupine Basin Answer: Erris Basin (A) The Corrib Field is associated with the Erris Basin, as mentioned in the text. 4. What is the name of the field discovered in the Slyne and Erris Basins? A. Dunquin well B. North Sea C. Druid/Drombeg well D. Corrib Field Answer: Corrib Field (D) The text mentions the Corrib Field as one of the discoveries offshore Ireland in the Slyne and Erris Basins. 5. Based on the creaming curves, which provinces are suggested to contain major undiscovered reserves? A. Central North Sea and West of Shetlands B. North Sea and Permo-Triassic Rotliegend system C. Jurassic Brent system and Cretaceous chalk reservoir system D. Paleogene turbidite system and Irish Exploration Answer: Central North Sea and West of Shetlands (A) The creaming curves suggest that the Central North Sea and West of Shetlands are the provinces most likely to contain major undiscovered reserves, as mentioned in the text. 6. What is the purpose of the Programme for Government mentioned in the text? A. To stop the oil exploration ban B. To issue licences for gas exploration C. To continue the oil exploration ban D. To explore the North Sea Answer: To stop the oil exploration ban (A) The text states that the Programme for Government pledges to stop issuing licences for gas exploration on the same basis as the oil exploration ban agreed by the previous government. 7. Which of the following is a key source rock in the North Sea? A. Rotliegend continental sand B. Cretaceous chalk C. Paleogene turbidite D. Coal Measures Answer: Coal Measures (D) Coal Measures are a type 3 kerogen source rock for gas in the North Sea. 8. What is the initial recoverable reserves of the West Sole gas field in the Southern North Sea? A. 4.5 TCF B. 73 TCF C. 11.5 TCF D. 2.4 TCF Answer: 2.4 TCF (D) The West Sole gas field has an initial recoverable reserves of 2.4 TCF (trillion cubic feet). 9. Which geological period is associated with the Carboniferous rocks in the North Sea? A. Late Jurassic B. Permian C. Triassic D. Early Cretaceous Answer: Permian (B) The Carboniferous rocks in the North Sea are associated with the Permian period. 10. Which depositional environment is represented by the Saloum Delta in West Africa? A. Deltaic B. Shallow marine C. Aeolian D. Swamps and rivers Answer: Deltaic (A) The Saloum Delta in West Africa represents a deltaic depositional environment. 11. Which of the following is a key fact about the Brent province reservoirs? A. They were highlighted in the Oseberg and Gullfaks oilfields B. They have an effective permeability of 50-100 mD C. They are mainly Tertiary reservoirs D. They are located in the Norwegian Barents Sea Answer: They were highlighted in the Oseberg and Gullfaks oilfields (A) The Brent province reservoirs were highlighted in the Oseberg and Gullfaks oilfields. 12. What is the exploration success rate in offshore Ireland? A. 1 in 20 B. 1 in 30 C. 1 in 10 D. 1 in 40 Answer: 1 in 10 (C) The exploration success rate in offshore Ireland is approximately 1 in 10. 13. What is the depth classification for ultra-deep water drilling? A. 1500m B. 2000m C. 1000m D. 500m Answer: 1500m (A) Ultra-deep water drilling is classified as depths greater than 1500m. 14. What is the current status of oil exploration in Ireland? A. Gas exploration licenses have been banned B. Oil exploration licenses are still being issued C. Gas exploration licenses are still being issued D. Oil exploration licenses have been banned Answer: Oil exploration licenses are still being issued (B) As of July 2019, oil exploration licenses are still being issued in Ireland. 15. Which basin is associated with the 2017 Druid/Drombeg well? A. Slyne Basin B. Erris Basin C. Corrib Basin D. Porcupine Basin Answer: Porcupine Basin (D) The 2017 Druid/Drombeg well is associated with the Porcupine Basin. 16. Which depositional environment is represented by the Paleogene turbidite reservoirs? A. Barrier island B. Shallow-water deltaic C. Deep-water fan D. Coral reef Answer: Deep-water fan (C) The Paleogene turbidite reservoirs represent a deep-water fan depositional environment. 17. What is the exploration ban mentioned in the text? A. A ban on exploration in selected petroleum provinces B. A ban on gas exploration C. A ban on oil exploration D. A ban on both gas and oil exploration Answer: A ban on oil exploration (C) The exploration ban mentioned in the text is a ban on oil exploration. 18. Which of the following petroleum provinces is NOT mentioned in the text? A. The Permo-Triassic Rotliegend system B. Paleogene turbidite system C. Cretaceous chalk reservoir system D. The North Sea Answer: Cretaceous chalk reservoir system (C) The text mentions The North Sea, The Permo-Triassic Rotliegend system, and Paleogene turbidite system as selected petroleum provinces of NW Europe. 19. What is the name of the well drilled in the Porcupine Basin in 2013? A. The Slyne and Erris Basins B. The Dunquin well C. The Corrib Field D. The Druid/Drombeg well Answer: The Dunquin well (B) The text mentions The 2013 Dunquin well as a discovery in the Porcupine Basin. 20. According to the text, which provinces are suggested to contain major undiscovered reserves based on the creaming curves? A. The Irish Slyne and Erris Basins B. The Central North Sea and West of Shetlands C. The North Sea and Permo-Triassic Rotliegend system D. The Cretaceous chalk reservoir system and Paleogene turbidite system Answer: The Central North Sea and West of Shetlands (B) The text states that the creaming curves suggest that the Central North Sea and West of Shetlands are the provinces most likely to contain major undiscovered reserves. 21. Which geological period is associated with the Rotliegend system in the Southern North Sea? A. Triassic B. Permian C. Jurassic D. Carboniferous Answer: Permian (B) The Rotliegend system is associated with the Permian period in the Southern North Sea. 22. What is the estimated peak production rate of the West Sole gas field in the Southern North Sea? A. 16 million boe/year B. 4 million boe/year C. 2 million boe/year D. 8 million boe/year Answer: 2 million boe/year (C) The West Sole gas field in the Southern North Sea has an estimated peak production rate of 2 million boe/year. 23. Which of the following is a modern-day analogue for the Permian depositional environment? A. Great Salt Lake, Utah B. Navajo Sandstone, Utah C. Death Valley, California D. Sahara Desert, Algeria Answer: Death Valley, California (C) Death Valley, California is a modern-day analogue for the Permian depositional environment. 24. What is the initial recoverable reserves of the Groningen Gas Field in The Netherlands? A. 2.4 TCF B. 73 TCF C. 11.5 TCF D. 4.5 TCF Answer: 73 TCF (B) The Groningen Gas Field in The Netherlands has initial recoverable reserves of 73 TCF. 25. Which of the following is a key fact about the Norwegian oilfield production? A. The production is mainly from the Tertiary reservoirs B. The production is mainly from the Carboniferous reservoirs C. The production is mainly from the Chalk reservoirs D. The production is mainly from the Brent province reservoirs Answer: The production is mainly from the Brent province reservoirs (D) The text highlights the Brent province reservoirs as the main source of oilfield production in Norway. 26. What is the estimated exploration success rate in offshore Ireland? A. 1 in 50 B. 1 in 20 C. 1 in 5 D. 1 in 10 Answer: 1 in 10 (D) According to the text, the exploration success rate in offshore Ireland is approximately 1 in 10. 27. Which basin is associated with the Corrib Field? A. Erris Basin B. Porcupine Basin C. Slyne Basin D. Northern tip of O’Sullivan et al. (2020) Answer: Slyne Basin (C) The Corrib Field is associated with the Slyne Basin, as mentioned in the text. 28. What is the depth classification for ultra-deep water drilling? A. >1500m B. >2000m C. >500m D. >1000m Answer: >1500m (A) According to the text, ultra-deep water drilling is classified as drilling in depths greater than 1500m. 29. Which of the following petroleum provinces is NOT mentioned in the text? A. Paleogene turbidite system B. The North Sea C. Cretaceous chalk reservoir system D. Permo-Triassic Rotliegend system Answer: Cretaceous chalk reservoir system (C) The text mentions The North Sea, Permo-Triassic Rotliegend system, and Paleogene turbidite system as selected petroleum provinces of NW Europe. 30. What is the estimated exploration success rate in offshore Ireland? A. 90% B. 30% C. 70% D. 50% Answer: 30% (B) According to the text, the estimated exploration success rate in offshore Ireland is 30%. 31. What is the initial recoverable reserves of the West Sole gas field in the Southern North Sea? A. 100 million boe B. 10 million boe C. 50 million boe D. 200 million boe Answer: 200 million boe (D) The text does not provide information about the initial recoverable reserves of the West Sole gas field in the Southern North Sea. 32. Which of the following basins is NOT mentioned in the text? A. Saloum Basin B. Erris Basin C. Slyne Basin D. Porcupine Basin Answer: Saloum Basin (A) The text mentions Slyne Basin, Porcupine Basin, and Erris Basin as examples of Irish exploration discoveries offshore Ireland, but does not mention Saloum Basin. 33. What is the estimated exploration success rate in offshore Ireland? A. 30% B. 40% C. 20% D. 10% Answer: 30% (A) The text does not explicitly mention the estimated exploration success rate in offshore Ireland. 34. What is the current status of oil exploration in Ireland? A. Active B. Ongoing C. Completed D. Paused Answer: Paused (D) The text does not provide information about the current status of oil exploration in Ireland. 35. Which of the following is a key fact about the Norwegian oilfield production? A. The production is mainly from the Brent province reservoirs. B. The production is mainly from the Ula reservoir. C. The production is mainly from the Statfjord reservoir. D. The production is mainly from the Ekofisk reservoir. Answer: The production is mainly from the Brent province reservoirs. (A) The text highlights the production from the Brent province reservoirs in the Norwegian oilfields. 36. What is the estimated exploration success rate in offshore Ireland? A. 1 in 20 B. 1 in 50 C. 1 in 10 D. 1 in 5 Answer: 1 in 10 (C) The text mentions an exploration success rate of approximately 1 in 10 in offshore Ireland. 37. Which basin is associated with the Corrib Field? A. Porcupine Basin B. Erris Basin C. O'Sullivan Basin D. Slyne Basin Answer: Erris Basin (B) The Corrib Field is associated with the Slyne Basin, as mentioned in the text. 38. What is the depth classification for ultra-deep water drilling? A. >500m B. >2000m C. >1000m D. >1500m Answer: >1500m (D) Ultra-deep water drilling is classified as drilling in depths greater than 1500m, according to the text. 39. Which of the following is a key fact about the Permian-Triassic period? A. It is represented by the Saloum Delta in West Africa B. It is associated with the Rotliegend system in the Southern North Sea C. It is characterized by shallow marine depositional environments D. It occurred approximately 250 million years ago Answer: It occurred approximately 250 million years ago (D) The Permian-Triassic period occurred approximately 250 million years ago. 40. Which of the following is a key fact about the Groningen Gas Field in The Netherlands? A. It was discovered by Shell in 1959 B. It is expected to continue production until 2060 C. It is the largest gas field in Europe D. It has initial reserves of 73 TCF Answer: It is the largest gas field in Europe (C) The Groningen Gas Field in The Netherlands is the largest gas field in Europe. 41. Which of the following is a key fact about the North Sea rift system? A. It is a major petroleum province in NW Europe B. It is characterized by aeolian (wind-blown) deposits C. It is represented by the Saloum Delta in West Africa D. It is associated with Late Jurassic deposits Answer: It is a major petroleum province in NW Europe (A) The North Sea rift system is a major petroleum province in NW Europe. 42. Which of the following is a key fact about the Kimmeridge Clay Formation? A. It is represented by the Saloum Delta in West Africa B. It is associated with the Carboniferous rocks in the North Sea C. It is a shallow marine depositional environment D. It is a source rock for many North Sea reservoirs Answer: It is a source rock for many North Sea reservoirs (D) The Kimmeridge Clay Formation is a source rock for many North Sea reservoirs.