15 Questions
What was the original recoverable reserves of the Ekofisk reservoir?
3.3 billion bbls oil
When was the development decision for the Ekofisk reservoir made?
1972
Which year did Ekofisk production license get extended to?
2022
What is the approximate value of 6 million m3 of oil in euros at $50/bbl?
2 billion
Which of the following is NOT a drive mechanism for the Ekofisk reservoir?
Water Drive
What was the approximate decrease in porosity of the Ekofisk Chalk due to compaction?
20%
What was the estimated final primary recovery factor of the Ekofisk reservoir?
24%
What percentage of the original recoverable reserves could be extracted from the reservoir?
20%
What mechanism occurs due to the decrease in pore pressure and leads to oil displacement in the Ekofisk reservoir?
Compaction drive
What contributed to the overall decrease in reservoir volume in the Ekofisk reservoir?
Compaction
What was the primary recovery mechanism of the Ekofisk reservoir?
Pressure depletion and solution gas drive
What was the initial pressure of the Ekofisk reservoir?
7135 psi
What was the estimated final primary recovery factor of the Ekofisk reservoir?
Approximately 24%
What was the typical viscosity of Ekofisk oil?
0.25 cp
What was the expected increase in recovery from the water injector at Ekofisk?
Approximately 10%
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%
Test your knowledge of the Ekofisk reservoir with this quiz covering key points such as 4D seismic usage, primary recovery mechanisms, pressure depletion, estimated recovery factors, production license extensions, and oil valuation. See how much you know about this significant oil field.
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