An investor seeking tax advantages through an oil and gas dpp. with this type of partnership he would expect to benefit most from

The answer is "depreciation allowances and tax credits."

Depreciation allowance refers to a sum that can be removed a business' benefit figure while ascertaining charge, to take into account the way that an advantage has lost piece of its incentive amid a specific time frame.  

An tax credit is a measure of cash that citizens can subtract from charges owed to their legislature. The estimation of a tax credit relies upon the idea of the credit; certain sorts of expense credits are conceded to people or organizations in particular areas, orders or ventures.