How to login to blockchain wallet
1.Login to your wallet on Blockchain.info
2.Goto the 'Settings' Menu on the left
3.Goto the 'Addresses' Submenu under 'Settings' Menu
4.On the right side find the section named 'Imported Addresses'
5.Click on 'Manage Addresses'
6.On the new screen find the address you want to export the private key from
7.Click on the 'More Options' on far right side of that address
8.Select 'Private Key' and then 'Continue'
9.Choose the 'Private Key Format' : 'WIF'
10.Copy the Private Key listed and go to your Omniwallet
11.Once you have this you can go to https://www.omniwallet.org and click '12.Create a New Wallet' (or log into a wallet you already created).
13.Once you have created/logged into your wallet go to the 'My Address' page and click the 'Import Address with Private Key' Button.
14.Enter the private key you exported from blockchain.info and in a few moments that address should be added to your wallet and displayed in the list below giving you access to your BTC and any Omni Protocol Properties on that address..If the newly imported address does NOT match the address you are expecting try taking a look at this article: After importing my private key and the address I get is different than what I expected!
https://github.com/OmniLayer/omniwallet
https://github.com/OmniLayer/omniwallet/wiki/Exporting-Private-Key-from-Blockchain.info-and-Importing-to-Omniwallet.org#for-blockchaininfo-classic-wallets