business overview of Green
SK earthon aims to be a Carbon Neutral E&P Company
by promoting CCS business as a green domain.
CCS stands for 'Carbon Capture & Storage', which refers to the entire process of collecting
and transporting the CO2 and injecting it into an underground storage.
The function of each phase is similar to the traditional E&P business but it is a value chain in
the opposite direction. Also, it is similar to the technology applied to the traditional E&P
business as it deals with the movement of fluids in the underground sedimentary layer.
In order to use it as a CO2 storage, a high-pressure environment with a depth of 800m or more is required.
Also, the porous, highly permeable storage rock should be surrounded by a thick, crack-free cover rock.
There are two typical types of storage: saline aquifer and depleted oil/gas fields
It is a concept of storing CO2 by injecting CO2 into the pores of the rock filled
with brine in the underground sedimentary layer.
In order to relieve pressure and increase storage efficiency when injecting
CO2, a pumping system using a nearby water production well is applied.
Representative examples may include Northern Light in
Norway, and Gorgon CCS storage in Australia.
Depleted oil and gas fields
It is an depleted oil/gas field after the completion of commercial production.
It is a concept of re-injecting CO2 and storing into the pores of the rock
where the pressure is lowered after production is finished.
Representative example is the Acron CCS storage in the UK