This gives a balanced view...
"
Would Scotland be better off without England?
The SNP has two answers to the accusation that Scotland lives off English subsidies. One is that a self-governing Scotland could manage its economy better, attracting EU support and joining an "arc of prosperity" with its near neighbours, Norway, Denmark and Iceland.
The other answer is oil. In the past 30 years, taxes from North Sea oil have amounted to about £200bn, at today's prices. Last year's receipts were around £8bn, and this year's will be higher, possibly up to £12.5 bn. That looks like enough to fill the gap between income and expenditure but it assumes that an English government would roll over and concede that all tax revenues from oil belong to Scotland. Actually, London would fight for a share. And North Sea oil is a diminishing asset. Production peaked at 2.9m barrels a day in 1999, and by 2010 is expected to be down to a million barrels a day barely a third of what it used to be. If the Scots want exclusive use of the taxes generated by "their" oil, they have left it too late."
The Big Question: What would Scottish independence mean, and how would it work? - UK Politics - UK - The Independent
However if you want the SNP view
here it is