Close Big Oil Tax Loopholes Act This bill limits or repeals tax and royalty relief provisions that benefit certain large oil companies. It modifies foreign tax credit rules applicable to such companies and limits deductions for intangible drilling and development costs, percentage depletion, enhanced oil recovery, and other tax preferences. The bill repeals the outer Continental Shelf deep water and deep gas royalty relief provisions. Any savings resulting from this bill must be used for federal budget deficit reduction or, if there is no current budget deficit, for reducing the federal debt.