13 Questions
What is the theoretical storage efficiency for regional storage assessments for saline aquifers?
5%
Which type of CO2 storage involves the production of blue hydrogen from natural gas with carbon capture?
Deep Saline Aquifer Storage
What is the greatest leakage risk for sequestration in depleted hydrocarbon fields?
Integrity of existing wells
What is the process involving the physical entrapment of CO2 in the pore spaces of the rock?
Residual trapping
What can lead to top-seal failure and leakage in CO2 accumulation?
High injection rate or CO2 column thickness
What influences capillary pressure in CO2 accumulation and can cause leakage if it matches the capillary threshold pressure of the seal?
Fluid density contrast
Which formation consists of 200m thick sands capped by mudstone and has been effective in storing CO2 without evidence of leakage?
Utsira Formation
What is the primary risk to well integrity in sequestration in depleted hydrocarbon fields?
Corrosion by carbonic acid
Where will CO2 be injected in the Northern Lights CCS project?
At a depth of 2700m
What are the trapping mechanisms for CO2 sequestration in saline aquifers?
Structural/stratigraphic trapping, residual trapping, solubility trapping, and mineral trapping
In which project were Equinor, Shell, and Total awarded the first exploitation license for CO2 storage?
Northern Lights CCS project
What is the primary risk to well integrity in sequestration in depleted hydrocarbon fields?
Corrosion by carbonic acid
What are the trapping mechanisms for CO2 sequestration in saline aquifers mentioned in the text?
Structural/stratigraphic trapping, residual trapping, solubility trapping, and mineral trapping
Study Notes
First Exploitation License for CO2 Storage
- Equinor, Shell, and Total were awarded the first exploitation license for CO2 storage in the Northern Lights CCS project
- CO2 will be injected at a depth of 2700m in the Northern Lights CCS project, approximately 20 km south of the Troll Structure
- Ocean storage falls under the theoretical storage capacity for dissolution type of CO2 storage
- Low CO2 storage efficiency is due to an unfavorable CO2 - water mobility ratio
- Corrosion by carbonic acid poses a primary risk to well integrity in sequestration in depleted hydrocarbon fields
- The HyNet Project for blue hydrogen production and CO2 storage is located in the East Irish Sea Basin
- The trapping mechanisms for CO2 sequestration in saline aquifers include structural/stratigraphic trapping, residual trapping, solubility trapping, and mineral trapping
- The HyNet Project is associated with CO2 storage in depleted oil reservoirs
- The injectivity index is a function of the formation permeability, the fluid viscosity, and the thickness of the permeable interval
- For structural and stratigraphic trapping to occur, a reservoir rock, a trap, and a seal are needed
- The purpose of CO2 plume migration and trapping mechanisms in saline aquifers is to prevent CO2 from escaping the storage site
- Examples of CO2 sequestration modeling mentioned in the text include the Utsira Formation, the Garn and Ile formations
Test your knowledge of CO2 storage exploitation and trapping mechanisms with this quiz covering topics such as Northern Lights CCS project, HyNet Project, and CO2 sequestration modeling.
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