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Enhanced Oil Recovery Using Carbon Dioxide in the European Energy System


Quiz Questions

1. Enhanced oil recovery (EOR) is a term used to describe a set of processes intended to __________ the production of oil beyond what could normally be extracted when using conventional oil production techniques.
Increase
Decrease
Prevent
None of the above
2. A common element in both concepts, hydrogen and the zero emissions fossil fuel power plant, is the need to capture ________ and store it safely and permanently.
CO
CO2
O3
All of the above
3. ___________ is the largest oil producer in Western Europe.
Norway
Denmark
Germany
Netherlands
4. Experience from CO2-EOR projects in the USA shows that on average 0.33 tonnes of CO2 are required to produce an incremental barrel of oil in miscible EOR operations; this value could increase to 0.8 -1.1 tonnes per barrel of oil for immiscible CO2-EOR.
True
False
5. Petroleum is formed in deep geologic formations called __________.
Source fields
Source rocks
Entrapments
None of the above
6. Oil recovery techniques have traditionally been grouped into _________ categories.
2
3
4
7
7. A minimum miscibility pressure (MMP) is required so that CO2 becomes fully miscible with oil. At that pressure, the density of CO2 is __________ to that of the crude oil.
More
Less
Similar
None of the above
8. Experience has shown that the conditions that favor immiscible displacement include which of the following?
High vertical permeability in the reservoir rock
Absence of fractures that reduce sweep efficiency
A substantial amount of oil to form a thick oil column
All of the above
9. Which of the following is not a competing EOR Process?
Chemical processes
Microbial EOR
N2-EOR
Thermal processes
10.

CO2 handling can results in corrosion of iron infrastructure.
True
False
11.

Which of the following is not a technical issue that may hinder the implementation of CO2-EOR in Europe?
Lack of experience with immiscible projects
Corrosion of some of the infrastructure in place, not initially designed for CO2 use.
Increased operating costs, mainly due to the purchase of CO2
Challenging operating conditions in offshore recovery projects, related to the number of existing wells and their spatial distribution.
12. Further research and more importantly development on which of the following specific areas is needed to facilitate the large-scale implementation of CO2-EOR in Europe?
Improvement of injectivity
Methods to verify and monitor CO2 in the oil reservoir
Improved reservoir monitoring using 4-D (time lapse) seismic surveillance
All of the above
13. A total of _____ oil fields in the North Sea were considered in the case study (The Implementation of CO2-EOR in the North Sea) taking into consideration data of oil reserves, production history, reservoir and oil parameters and field infrastructure in order to assess the potential for CO2- EOR applications.
52
73
81
94
14. Ways to increase CO2 storage in oil recovery include which of the following?
Redesigning the wells to create favorable injection profiles
Considering injection to aquifers underlying the oil fields
Optimizing water injection towards maximizing gas storage
All of the above
15. The CO2 is supplied dry at a temperature over 32°C and pressurized to 110 bar (supercritical fluid) at the entry of the pipeline. To avoid the formation of carbonic acid, the relative humidity of the CO2 must be under___________.
10 ppm
18 ppm
25 ppm
40 ppm