Exhibit 31.2
CERTIFICATION
I, Gysle R. Shellum, certify that:
| | 1. | I have reviewed this Report on Form 10-K/A of Petroleum Development Corporation. |
| | 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
| Date: August 31, 2010 | /s/ Gysle R. Shellum | |
| | Gysle R. Shellum | |
| | Chief Financial Officer | |
