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| SEC FILE NUMBER                                                                                                                                                                                                                                                                                                                                                                                                                               |
| CUSIP NUMBER                                                                                                                                                                                                                                                                                                                                                                                                                                  |

**UNITEDSTATESSECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C.20549**

** **

**FORM12b-25**

| *(Check one):* |  | X  Form 10-K   Form 20-F     Form 11-K     Form 10-Q     Form N-SAR    Form N-CSR |
|----------------|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**NOTIFICATION OF LATE FILING**

|  |  |                                                                                                                                                                                                                                                                                                                                         |  |                                       |
|--|--|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|---------------------------------------|
|  |  | For Period Ended: **December 31,  2005                                          **                               |
|  |  |                                                                                                                                                                                                                                                                                                                                 |  | Transition Report on  Form 10-K  |
|  |  |                                                                                                                                                                                                                                                                                                                                 |  | Transition Report on  Form 20-F  |
|  |  |                                                                                                                                                                                                                                                                                                                                 |  | Transition Report on  Form 11-K  |
|  |  |                                                                                                                                                                                                                                                                                                                                 |  | Transition Report on  Form 10-Q  |
|  |  |                                                                                                                                                                                                                                                                                                                                 |  | Transition Report on  Form N-SAR |
|  |  | For the Transition Period  Ended:                                                  |

* *

| *Read Instruction (on back page) Before Preparing  Form. Please Print or Type*

**Nothing in this form shall be construed to imply that  the Commission has verified any information contained herein.** |
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Ifthe notification relates to a portion of the filing checked above, identify theItem(s) to which the notification relates: 

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**PART I - REGISTRANT INFORMATION**

PetroleumDevelopment Corporation

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Full Name of Registrant

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Former Name if Applicable

103 East Main Street

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Address of Principal ExecutiveOffice *(Street and Number)*

** **

**Bridgeport,WV 26330**

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City, State and Zip Code

** **

**PARTII - RULES 12b-25(b) AND (c)**

Ifthe subject report could not be filed without unreasonable effort or expenseand the registrant seeks relief pursuant to Rule 12b-25(b), the followingshould be completed. (Check box if appropriate) 

|   |  |     |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|---|--|-----|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |  | (a) |  | The reason described in  reasonable detail in Part III of this form could not be eliminated without  unreasonable effort or expense                                                                                                                                                                                                                                                                                                                        |
| X |  | (b) |  | The subject annual report,  semi-annual report, transition report on Form 10-K, Form 20-F,  Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be  filed on or before the fifteenth calendar day following the prescribed due  date; or the subject quarterly report or transition report on Form 10-Q,  or portion thereof, will be filed on or before the fifth calendar day  following the prescribed due date; and |
|   |  | (c) |  | The accountant's statement  or other exhibit required by Rule 12b-25(c) has been attached if  applicable.                                                                                                                                                                                                                                                                                                                                             |

** **

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** **

**PARTIII - NARRATIVE**

Statebelow in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, N-SAR, N-CSR, orthe transition report or portion thereof, could not be filed within theprescribed time period. 

|                                  |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|----------------------------------|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (Attach  extra Sheets if Needed) |  | Petroleum  Development Corporation (the "Company") files this report for a 15 day  extension, from March 16 to March 31, 2006, for filing its Annual Report on  Form 10-K for the period ended December 31, 2005.  The Company will not file  its Form 10-K by March 16, 2006 because it will be unable to complete the  preparation of its consolidated financial statements and the work required to  complete management's assessment of internal controls over financial  reporting in accordance with Section 404 of Sarbanes-Oxley  by the initial  filing date without unreasonable effort or expense.  The Company anticipates  that it will be able to file its complete Annual Report on Form 10-K by March  31, 2006. This extension is due, in part, to the  additional work required to complete the recently filed restatement of its  2004 consolidated financial statements on Form 10-K/A and the 2005 first  quarter consolidated financial statements on Form 10-Q/A, and the subsequent  filing of its second and third quarter of 2005 Form 10-Q's, the last of which  was completed January 12, 2006. |

| SEC 1344 (07-03) |  | **Persons who are to  respond to the collection of information contained in this form are not  required to respond unless the form displays a currently valid OMB control  number.** |
|------------------|--|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**PART IV - OTHER INFORMATION**

| (1)   | Name and  telephone number of person to contact in regard to this notification |
|-----------------|--------------------------------------------------------------------------------|

| Darwin L. Stump |  | 304         |  | 842-3597           |
|-----------------|--|-------------|--|--------------------|
| (Name)          |  | (Area Code) |  | (Telephone Number) |  |  |

| (2)   | Have all other  periodic reports required under Section 13 or 15(d) of the Securities  Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940  during the preceding 12 months or for such shorter period that the  registrant was required to file such report(s) been filed ? If answer is no,  identify report(s).          Yes  X  No  |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| (3)   | Is it  anticipated that any significant change in results of operations from the  corresponding period for the last fiscal year will be reflected by the  earnings statements to be included in the subject report or portion thereof? |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

Yes  No X 

|     | If so, attach an  explanation of the anticipated change, both narratively and quantitatively,  and, if appropriate, state the reasons why a reasonable estimate of the  results cannot be made. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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Petroleum Development Corporation 

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(Name of Registrant as Specified in Charter)

hascaused this notification to be signed on its behalf by the undersigned hereuntoduly authorized. 

|                     |  |    |  |                                           |
|---------------------|--|----|--|-------------------------------------------|
| Date March 10, 2006 |  | By |  | /s/ Darwin L. Stump                       |
|                     |  |    |  | Darwin L. Stump, Chief  Financial Officer |

INSTRUCTION: The form may be signed by anexecutive officer of the registrant or by any other duly authorizedrepresentative. The name and title of the person signing the form shall betyped or printed beneath the signature. If the statement is signed on behalf ofthe registrant by an authorized representative (other than an executiveofficer), evidence of the representative's authority to sign on behalf of theregistrant shall be filed with the form. 

| **ATTENTION**

**Intentional misstatements or omissions of fact  constitute Federal Criminal Violations (See 18 U.S.C. 1001).** |
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** **

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**GENERALINSTRUCTIONS**

| 1.     | This form is  required by Rule 12b-25 (17 CFR 240.12b-25) of the General Rules and  Regulations under the Securities Exchange Act of 1934.                                                                                                                                                                                                                                                                                                                                                                          |
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| 2.     | One signed  original and four conformed copies of this form and amendments thereto must  be completed and filed with the Securities and Exchange Commission,  Washington, D.C. 20549, in accordance with Rule 0-3 of the General Rules  and Regulations under the Act. The information contained in or filed with the  form will be made a matter of public record in the Commission files.                                                                                                                         |  |  |  |
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| 3.     | A manually  signed copy of the form and amendments thereto shall be filed with each  national securities exchange on which any class of securities of the  registrant is registered.                                                                                                                                                                                                                                                                                                                                     |  |  |  |
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| 4.     | Amendments to  the notifications must also be filed on Form 12b-25 but need not restate  information that has been correctly furnished. The form shall be clearly  identified as an amended notification.                                                                                                                                                                                                                                                                                                                |  |  |  |
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| *5.*   | *Electronic  Filers:*This form shall  not be used by electronic filers unable to timely file a report solely due to  electronic difficulties. Filers unable to submit reports within the time  period prescribed due to difficulties in electronic filing should comply with  either Rule 201 or Rule 202 of Regulation S-T (§232.201 or  §232.202 of this chapter) or apply for an adjustment in filing date pursuant  to Rule 13(b) of Regulation S-T (§232.13(b) of this chapter). |  |  |  |