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Questions and Answers
What was the original recoverable reserves of the Ekofisk reservoir?
What was the original recoverable reserves of the Ekofisk reservoir?
- 5.6 TCF gas
- 3.3 billion bbls oil (correct)
- 4.5 billion bbls oil
- 3.3 billion bbls oil and 5.6 TCF gas
When was the development decision for the Ekofisk reservoir made?
When was the development decision for the Ekofisk reservoir made?
- 1971
- 1973
- 1974
- 1972 (correct)
Which year did Ekofisk production license get extended to?
Which year did Ekofisk production license get extended to?
- 1989
- 2017
- 1972
- 2022 (correct)
What is the approximate value of 6 million m3 of oil in euros at $50/bbl?
What is the approximate value of 6 million m3 of oil in euros at $50/bbl?
Which of the following is NOT a drive mechanism for the Ekofisk reservoir?
Which of the following is NOT a drive mechanism for the Ekofisk reservoir?
What was the approximate decrease in porosity of the Ekofisk Chalk due to compaction?
What was the approximate decrease in porosity of the Ekofisk Chalk due to compaction?
What was the estimated final primary recovery factor of the Ekofisk reservoir?
What was the estimated final primary recovery factor of the Ekofisk reservoir?
What percentage of the original recoverable reserves could be extracted from the reservoir?
What percentage of the original recoverable reserves could be extracted from the reservoir?
What mechanism occurs due to the decrease in pore pressure and leads to oil displacement in the Ekofisk reservoir?
What mechanism occurs due to the decrease in pore pressure and leads to oil displacement in the Ekofisk reservoir?
What contributed to the overall decrease in reservoir volume in the Ekofisk reservoir?
What contributed to the overall decrease in reservoir volume in the Ekofisk reservoir?
What was the primary recovery mechanism of the Ekofisk reservoir?
What was the primary recovery mechanism of the Ekofisk reservoir?
What was the initial pressure of the Ekofisk reservoir?
What was the initial pressure of the Ekofisk reservoir?
What was the estimated final primary recovery factor of the Ekofisk reservoir?
What was the estimated final primary recovery factor of the Ekofisk reservoir?
What was the typical viscosity of Ekofisk oil?
What was the typical viscosity of Ekofisk oil?
What was the expected increase in recovery from the water injector at Ekofisk?
What was the expected increase in recovery from the water injector at Ekofisk?
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Study Notes
Ekofisk Reservoir Key Points
- 4D seismic was used to identify the fault/fracture causing unwanted flow connection
- The primary recovery of the Ekofisk reservoir was mainly driven by pressure depletion and solution gas drive
- The initial pressure of the Ekofisk reservoir was 7135 psi
- The estimated final primary recovery factor of the Ekofisk reservoir was approximately 24%
- The primary recovery of the Ekofisk reservoir was driven by pressure depletion
- In April 2022, the Ekofisk production license was extended to 2048
- The primary recovery mechanism of the Ekofisk reservoir was pressure depletion
- At $50 per barrel, 6 million m3 of oil is approximately worth 2 billion euros
- The typical viscosity of Ekofisk oil is 0.25 cp
- The targeted recovery factor in the development plan for the Ekofisk reservoir was 20%
- The primary recovery of the Ekofisk reservoir was mainly driven by pressure depletion
- The expected increase in recovery from the water injector at Ekofisk was approximately 10%
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