| Cox D. A. #4342-097-01010 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Cox) | ActiveOil | 5,050 | Aug 27, 2008 | — | — |
| Walnut Bend Field Unit #152642-097-00970 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,646 | Jun 12, 2008 | — | — |
| Walnut Bend Field Unit #203642-097-02684 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,423 | May 21, 2008 | — | — |
| Walnut Bend Field Unit #30542-097-02712 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,300 | May 21, 2008 | — | — |
| Walnut Bend Field Unit #203942-097-02717 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,506 | May 21, 2008 | — | — |
| Henderson #142-097-33961 | — | Cooke, TXWalnut Bend (Bruhlmeyer) | Plugged | 4,400 | Feb 12, 2008 | — | — |
| Walnut Bend Field Unit #3036R42-097-31501 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,435 | Jan 17, 2008 | — | — |
| Walnut Bend Field Unit #301A42-097-02438 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,480 | Dec 12, 2007 | — | — |
| Walnut Bend Field Unit #192442-097-30866 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,800 | Oct 2, 2007 | — | — |
| Walnut Bend Field Unit #233742-097-02705 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,476 | Jul 9, 2007 | — | — |
| Walnut Bend Field Unit #203542-097-02688 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,578 | Jul 6, 2007 | — | — |
| Walnut Bend Field Unit #22142-097-02690 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,369 | Jul 6, 2007 | — | — |
| Walnut Bend Field Unit #234342-097-02707 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,472 | Jul 6, 2007 | — | — |
| Walnut Bend Field Unit #11142-097-01025 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,741 | May 3, 2007 | — | — |
| Walnut Bend Field Unit #205442-097-30356 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,250 | Feb 12, 2007 | — | — |
| Walnut Bend Field Unit #204142-097-02604 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,599 | Aug 17, 2006 | — | — |
| Walnut Bend Field Unit #2357A42-097-30493 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 4,920 | May 9, 2006 | — | — |
| Walnut Bend Field Unit #211642-097-33548 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,500 | May 9, 2006 | — | — |
| Walnut Bend Field Unit #1575A42-097-31513 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,900 | Apr 28, 2006 | — | — |
| Walnut Bend Field Unit #158242-097-32855 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,556 | Apr 28, 2006 | — | — |
| Walnut Bend Field Unit #25642-097-05352 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,002 | Aug 16, 2005 | — | — |
| Walnut Bend Field Unit #153042-097-00972 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,213 | Feb 25, 2005 | — | — |
| Walnut Bend Field Unit #3010A42-097-00988 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,643 | Feb 25, 2005 | — | — |
| Walnut Bend Field Unit #5142-097-01143 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveInjection | 5,715 | Jul 8, 2004 | — | — |
| Walnut Bend Field Unit #25942-097-00820 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,053 | May 4, 2004 | — | — |
| Walnut Bend Field Unit #201042-097-02543 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveInjection | 5,454 | Jun 16, 2003 | — | — |
| Walnut Bend Field Unit #224342-097-30748 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveInjection | 5,480 | Jun 16, 2003 | — | — |
| Austin C #142-097-33472 | Heritage Petroleum Inc. only | Cooke, TXWalnut Bend (Bruhlmeyer) | ActiveOil | 6,050 | Jun 16, 2003 | — | — |
| Walnut Bend Field Unit #3029A42-097-02018 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,345 | Jun 4, 2003 | — | — |
| Walnut Bend Field Unit #152742-097-00971 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,597 | May 28, 2003 | — | — |
| Walnut Bend Field Unit #9142-097-02563 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,600 | Feb 13, 2003 | — | — |
| Walnut Bend Field Unit #153342-097-00973 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 5,515 | Jan 21, 2003 | — | — |
| Walnut Bend Field Unit #10142-097-01030 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,609 | Dec 12, 2002 | — | — |
| Walnut Bend Field Unit #158142-097-31735 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,500 | Sep 11, 2001 | — | — |
| Walnut Bend Field Unit #191342-097-02402 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,480 | Jul 3, 2001 | — | — |
| Walnut Bend Field Unit #203842-097-02685 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 4,521 | Jul 11, 2000 | — | — |
| Walnut Bend Field Unit #232942-097-02943 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,300 | Jul 11, 2000 | — | — |
| Atkins Neal #242-097-00956 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Bruhlmeyer) | Shut inOil | 5,002 | Oct 16, 1997 | — | — |
| Walnut Bend Field Unit #2047 A42-097-01012 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,648 | Jul 21, 1997 | — | — |
| Walnut Bend Field Unit No. 1 #201842-097-01020 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Winger) | PluggedOil | 5,499 | Jul 21, 1997 | — | — |
| Walnut Bend Field Unit #20342-097-02391 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 5,310 | May 20, 1997 | — | — |
| Walnut Bend Field Unit #17142-097-01111 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,525 | May 6, 1997 | — | — |
| Winger W E #142-097-07146 | Jet-Star Co. only | Cooke, TXWalnut Bend (Winger) | ActiveOil | 5,867 | Nov 27, 1996 | — | — |
| Walnut Bend Field Unit #156742-097-30358 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,600 | May 31, 1996 | — | — |
| Walnut Bend Field Unit #205942-097-30479 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | PluggedOil | 5,251 | May 21, 1996 | — | — |
| Atkins Neal #8342-097-33369 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Oil Creek Sand) | Shut inOil | 5,570 | Apr 24, 1996 | — | — |
| McGeorge Percy #2642-097-06780 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Cox) | Shut inOil | 4,446 | Apr 10, 1996 | — | — |
| Snuggs Fred #1242-097-02533 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Cox) | Shut inOil | 4,916 | Mar 4, 1996 | — | — |
| Walnut Bend Field Unit #303542-097-31313 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | Shut inOil | 11,965 | Jan 17, 1996 | — | — |
| Walnut Bend Field Unit #12242-097-01023 | Sydri Operating LLC only | Cooke, TXWalnut Bend (Consolidated) | ActiveOil | 8,165 | Sep 11, 1995 | — | — |