Oil and Gas Industry Antitrust Act of 2006

Oil and Gas Industry Antitrust Act of 2006 - Amends the Clayton Act to make it unlawful for any person to refuse to sell, or to export or divert, existing supplies of petroleum, gasoline, or other fuel derived from petroleum, or natural gas, with the primary intention of increasing prices or creating a shortage in a geographic market.

Directs the Attorney General (AG) and the Chairman of the Federal Trade Commission (FTC) to study whether section 7 of the Clayton Act (prohibiting certain mergers or acquisitions) should be amended to modify how that section applies to persons engaged in the business of exploring for, producing, refining, or otherwise processing, storing, marketing, selling, or otherwise making available petroleum, gasoline or other fuel derived from petroleum, or natural gas.

Requires the Comptroller General to study the effectiveness of divestitures required under certain prior oil and gas industry consent decrees.

Directs the AG and FTC Chairman to establish a joint federal-state task force to investigate information sharing among persons in the oil and gas industry.

No Oil Producing and Exporting Cartels Act of 2006 or NOPEC - Amends the Sherman Act to make it illegal for any foreign state or instrumentality thereof to act collectively with any other foreign state or instrumentality to: (1) limit oil production or distribution; (2) set or maintain the price of oil; or (3) take any other action in restraint of trade for oil, natural gas, or any petroleum product.