Shell said in the new environmental development plan of the Jackdaw field that it aims to start production from the field, which will supply 6.5% of Britain's gas output, by 3Q25 or 4Q25.
Shell has announced its intent to withdraw from its involvement in all Russian hydrocarbons, including crude oil, petroleum products, gas and LNG.
Phase 1 of the Herschel Expansion project comprises development of a new subsea production system and the first of up to three wells tied to the Na Kika platform.
It is anticipated that further exploration activity, including a second exploration well, will be required to determine the size and recoverable potential of the identified hydrocarbons at the Graff-1 deepwater exploration well.
Shell said in a statement that it had "concluded the economic case for investment in this project is not strong enough at this time, as well as having the potential for delays".
The company has pledged to become a net zero emissions company by 2050, but has come under pressure to make faster progress.