**EXHIBIT99.4**

February22, 2007

Edge PetroleumCorporation1301 Travis Street, Suite 2000Houston, Texas  77002

Gentlemen:

Atyour request, we have prepared a supplemental letter report to our originalreport dated January 23, 2007 of the reserves, future production, and incomeattributable to certain leasehold and royalty interests of Edge PetroleumCorporation (Edge) as of December 31, 2006. This report corrects Table 213 (Chapman Ranch 16) in our original reportwhich showed a development cost of 4667.52 M$ in year 2007.  This development cost should not have beenincluded and was removed for this supplemental report.  The revised Table 213 as well the updatedGrand Summaries for Total Proved Reserves and Total Proved Producing Reservesare included as attachments to this letter. The results of this study are summarized below.

**Supplemental SummarySEC PARAMETERS**Estimated Net Reserves and Income DataCertain Leasehold and Royalty Interests of**Edge Petroleum Corporation**
| ** **                     | ** ** | **As of December 31, 2006** | ** ** | ** **        | ** ** |
|--------------------------------|------------|-------------------------------------------------|------------|-------------------|------------|
| ** **                     | ** ** | **Proved**                                      | ** ** |
| ** **                     | ** ** | **Developed**                                   | ** ** | ** **        | ** ** | **Total** | ** ** |
| ** **                     | ** ** | **Producing**                                   | ** ** | **Non-Producing** | ** ** | **Undeveloped** | ** ** | **Proved** | ** ** |
| ***Net  Remaining Reserves***  |       |                                            |       |              |       |   |   |   |   |
| Oil/Condensate –  Barrels |       | 806,233                                         |       | 873,888           |       | 396,983 |   | 2,077,104 |   |
| Plant Products –  Barrels |       | 927,898                                         |       | 252,807           |       | 746,082 |   | 1,926,787 |   |
| Gas – MMCF                |       | 26,768                                          |       | 14,007            |       | 14,446 |   | 55,221 |   |
|                           |       |                                            |       |              |       |   |   |   |   |
| ***Income  Data ($M)***        |       |                                            |       |              |       |   |   |   |   |
| Future Gross  Revenue          |       | $                                               | 206,368.2  |              | $          | 124,403.2 |   | $ | 122,270.5 |   | $ | 453,041.9 |   |
| Deductions                     |       | 51,602.3                                        |       | 17,710.9          |       | 68,697.1 |   | 138,010.3 |   |
| Future Net  Income (FNI)       |       | $                                               | 154,765.9  |              | $          | 106,692.3 |   | $ | 53,573.4 |   | $ | 315,031.6 |   |
|                           |       |                                            |       |              |       |   |   |   |   |
| Discounted FNI @  10%          |       | $                                               | 120,705.8  |              | $          | 50,800.8 |   | $ | 28,502.7 |   | $ | 200,009.3 |   |

 

Liquid hydrocarbons are expressed in standard 42gallon barrels.  All gas volumes aresales gas expressed in millions of cubic feet (MMCF) at the officialtemperature and pressure bases of the areas in which the gas reserves arelocated.

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This report was prepared for the exclusive use andsole benefit of Edge Petroleum Corporation and may not be put to other usewithout our prior written consent for such use. The data, work papers, and maps used in this report are available forexamination by authorized parties in our offices.  Please contact us if we can be of furtherservice.
|       | Very truly yours,              |
|------------|--------------------------------|
|       |                           |
| ** ** | **RYDER  SCOTT COMPANY, L.P.** |
| ** ** | ** **                     |
|       | /s/ MIKE F.  STELL             |   |
|       | Michael F.  Stell, P.E.        |
|       | Senior Vice  President         |

 

MFS/pl

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