| Pharr Fieldwide Unit G-4-161059 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 67.3K | 10.6M | Jun 1996 – Jan 2002 |
| Pharr Fieldwide Unit G-4-164196 | Fina Oil & Chemical Company only | Pharr (Hensley) | Hidalgo | 1 | 64.9K | 3.62M | Dec 1996 – Apr 1998 |
| Pharr Fieldwide Unit G-4-189831 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 61.1K | 11.6M | Apr 2002 – Apr 2026 |
| Pharr Fieldwide Unit G-4-169612 | Shell Western E&P only | Pharr (Reichert) | Hidalgo | 1 | 51.6K | 5.99M | May 1998 – Jun 2005 |
| Pharr Fieldwide Unit G-4-257975 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 45.9K | 4.12M | May 2010 – Apr 2026 |
| Pharr Fieldwide Unit G-4-248850 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 34.1K | 2.12M | Apr 2009 – Apr 2026 |
| Pharr Fieldwide Unit G-4-160657 | OXY USA Inc. only | McAllen (Hansen) | Hidalgo | 1 | 29.7K | 2.5M | Apr 1996 – Jun 2012 |
| Pharr Fieldwide Unit G-4-261700 | OXY USA Inc. only | Pharr (Marks) | Hidalgo | 1 | 28.8K | 1.85M | Sep 2010 – Aug 2012 |
| Pharr Fieldwide Unit G-4-244667 | OXY USA Inc. only | Pharr (Bond) | Hidalgo | 1 | 28K | 1.79M | Dec 2008 – Aug 2011 |
| Pharr Fieldwide Unit G-4-235966 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 25.6K | 2.88M | Nov 2007 – Apr 2026 |
| Pharr Fieldwide Unit G-4-210399 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 24.9K | 2.95M | Mar 2005 – Apr 2026 |
| Pharr Fieldwide Unit G-4-179712 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 24.9K | 2.14M | May 2000 – Apr 2026 |
| Pharr Fieldwide Unit G-4-165027 | Totalfinaelf E&P USA Inc only | Pharr (Bond) | Hidalgo | 1 | 24.7K | 1.93M | Feb 1997 – Jun 2003 |
| Pharr Fieldwide Unit G-4-174886 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 20.3K | 1.8M | Jul 1999 – Mar 2022 |
| Pharr Fieldwide Unit G-4-178499 | Shell Western E&P only | Pharr (Hensley) | Hidalgo | 1 | 20.2K | 3.02M | Jun 2000 – May 2010 |
| Pharr Fieldwide Unit G-4-191480 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 18.5K | 1.42M | Jul 2002 – Apr 2026 |
| Pharr Fieldwide Unit G-4-150485 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 17.1K | 1.07M | Apr 1994 – Apr 2026 |
| Pharr Fieldwide Unit G-4-204247 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 17K | 9.8M | Apr 2004 – Apr 2026 |
| Pharr Fieldwide Unit G-4-151482 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 16.6K | 2.45M | Jul 1994 – Apr 2026 |
| Pharr Fieldwide Unit G-4-151646 | Shell Western E&P only | McAllen (Hansen) | Hidalgo | 1 | 16.2K | 1.47M | May 1994 – Dec 2009 |
| Pharr Fieldwide Unit G-4-177729 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 15K | 2.29M | Mar 2000 – Apr 2026 |
| Pharr Fieldwide Unit G-4-257976 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 13.3K | 1.08M | May 2010 – Apr 2026 |
| Pharr Fieldwide Unit G-4-251757 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 12.9K | 6.07M | Jun 2009 – Apr 2026 |
| Pharr Fieldwide Unit G-4-157515 | Totalfinaelf E&P USA Inc only | McAllen (Hansen) | Hidalgo | 1 | 11.8K | 1.21M | Jul 1995 – Dec 2001 |
| Pharr Fieldwide Unit G-4-33210 | Fina Oil & Chemical Company only | Pharr (FB-C, Bond) | Hidalgo | 1 | 11.6K | 1.37M | Jan 1993 – Dec 1997 |
| Pharr Fieldwide Unit G-4-199009 | Shell Western E&P only | Pharr (Hensley) | Hidalgo | 1 | 11.1K | 1.84M | Jun 2003 – Mar 2006 |
| Pharr Fieldwide Unit G-4-164332 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 10.8K | 1.88M | May 1997 – Oct 2004 |
| Pharr Fieldwide Unit G-4-240378 | OXY USA Inc. only | Pharr (Marks) | Hidalgo | 1 | 10.5K | 1.11M | Mar 2008 – Dec 2011 |
| Pharr Fieldwide Unit G-4-152465 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 10.2K | 602K | Oct 1994 – Apr 2026 |
| Pharr Fieldwide Unit G-4-189838 | Totalfinaelf E&P USA Inc only | Pharr (Bond) | Hidalgo | 1 | 9.62K | 557K | Dec 2000 – Jun 2002 |
| Pharr Fieldwide Unit G-4-155687 | OXY USA Inc. only | Pharr (Marks) | Hidalgo | 1 | 9.26K | 876K | Jun 1995 – Jan 2007 |
| Pharr Fieldwide Unit G-4-157518 | Totalfinaelf E&P USA Inc only | Pharr (Marks) | Hidalgo | 1 | 9.23K | 420K | Mar 1995 – Feb 2001 |
| Pharr Fieldwide Unit G-4-230771 | Shell Western E&P only | Pharr (Reichert) | Hidalgo | 1 | 8.9K | 947K | Jan 2007 – Feb 2009 |
| Pharr Fieldwide Unit G-4-167302 | Totalfinaelf E&P USA Inc only | Pharr (Bond) | Hidalgo | 1 | 8.43K | 1.09M | Feb 1997 – Nov 2002 |
| Pharr Fieldwide Unit G-4-136448 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 8.16K | 1.23M | Jan 1993 – May 2017 |
| Pharr Fieldwide Unit G-4-157409 | Totalfinaelf E&P USA Inc only | McAllen (Hansen) | Hidalgo | 1 | 8.15K | 1.01M | Sep 1995 – Dec 2001 |
| Pharr Fieldwide Unit G-4-267004 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 8.03K | 722K | Feb 2012 – Apr 2026 |
| Pharr Fieldwide Unit G-4-262312 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 7.24K | 777K | Aug 2011 – Apr 2026 |
| Pharr Fieldwide Unit G-4-136858 | Fina Oil & Chemical Company only | McAllen (Hansen) | Hidalgo | 1 | 7.07K | 222K | Jan 1993 – May 1999 |
| Pharr Fieldwide Unit G-4-162032 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 7K | 1.13M | Dec 1996 – Oct 1999 |
| Pharr Fieldwide Unit G-4-157553 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 6.63K | 691K | May 1995 – Apr 2026 |
| Pharr Fieldwide Unit G-4-223511 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 6.49K | 480K | Sep 2005 – Jul 2020 |
| Pharr Fieldwide Unit G-4-249807 | OXY USA Inc. only | Pharr (Hensley) | Hidalgo | 1 | 6.36K | 1.76M | Apr 2009 – Aug 2012 |
| Pharr Fieldwide Unit G-4-259373 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 6.21K | 454K | Nov 2010 – Apr 2026 |
| Pharr Fieldwide Unit G-4-199682 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 6.08K | 819K | Aug 2003 – Apr 2026 |
| Pharr Fieldwide Unit G-4-152207 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 5.8K | 745K | Nov 1994 – Apr 2000 |
| Pharr Fieldwide Unit G-4-189687 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 5.43K | 402K | May 2002 – May 2006 |
| Pharr Fieldwide Unit G-4-173403 | Totalfinaelf E&P USA Inc only | Pharr (8500) | Hidalgo | 1 | 4.33K | 254K | Jun 1999 – Jun 2001 |
| Pharr Fieldwide Unit G-4-241947 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.77K | 2.52M | Jun 2008 – Feb 2026 |
| Pharr Fieldwide Unit G-4-212925 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.74K | 244K | Aug 2005 – Apr 2026 |