You would need to verify this with your CPA, but I believe (from a non consent position) the cost of the well, or any associated fees would be determined to be passive income, and not considered an asset. Being as such, you would not be able to depreciate the value, nor claim a tax relief of the equipment used to drill the well. As a consenting partner, you would be able to claim the same reliefs as you would with any other type of investment. Again, you would need to verify this with your CPA, as free advice on a public forum would not be a defense in the event you failed to follow proper procedures when filing your tax records.