Google advises us, in plain language.

At Google, we take your privacy and security very seriously. Therefore, we're committed to returning accounts only when we're sure we're giving them back to the accounts' owners. Because Google doesn't ask for much personal information when you sign up for an account, we don't have many ways to verify that you own an account.

in other words, if you can't use either the account name / password, or the email address, to recover access to the Blogger account, then you may be out of luck.  Blogger has no legal right to give "you" access, if you cannot prove ownership.

You might be able to use the (recently improved) Google account recovery tool, if you remember what the email address was, and enough auxiliary details (there are 3 options in the menu, and each have different possibilities). We hope that you can see the bigger picture, and read the FAQs (below), objectively.

http://blogging.nitecruzr.net/​2012/03/recovering-your-​account-information.html

Read for Detail:

[FAQ] It's My Blog!! Why Won't Blogger Just Give Me Access To My Blog!!!!

[FAQ] Regarding account-related issues

[FAQ] How Do I Recover Access To My Blogger Account, Without Use Of The Backup Email Account?