| Webster Field Unit O-3-10496 | P.o.&g. Operating, LLC only | Webster | Harris | 385 | 26.2M | 262M | Jan 1993 – Jul 2026 |
| Webster Field Unit G-3-80998 | Exxon Corp. only | Webster | Harris | 1 | 0 | 0 | Jan 1993 – Jun 1994 |
| Webster Field Unit G-3-81000 | Exxon Corp. only | Webster | — | 1 | 0 | 0 | Jan 1993 – Jun 1994 |
| Webster Field Unit G-3-85537 | Exxon Corp. only | Webster | Harris | 1 | 0 | 0 | Jan 1993 – Oct 1993 |
| Webster Field Unit G-3-86940 | Exxon Corp. only | Webster | — | 1 | 0 | 0 | Jan 1993 – Oct 1993 |
| Webster G-3-87764 | Exxon Corp. only | Webster | — | 1 | 0 | 0 | Jan 1993 – Oct 1993 |
| Webster Field Unit G-3-87848 | Exxon Corp. only | Webster | Harris | 1 | 0 | 27.2K | Jan 1993 – Aug 1995 |
| Exxon-West Fee -B- O/C 2 G-3-87958 | Exxon Corp. only | Webster | Harris | 1 | 0 | 0 | Jan 1993 – Jun 1994 |
| Webster Field Unit G-3-99642 | Exxon Corp. only | Webster | Harris | 1 | 0 | 0 | Jan 1993 – Sep 1993 |
| Exxon West Fee B G-3-120455 | Exxon Corp. only | Webster | Harris | 1 | 0 | 0 | Jan 1993 – Jul 1993 |
| Webster Field Unit G-3-172060 | Exxon Mobil Corporation only | Webster | — | 1 | 0 | 9.2M | Feb 1999 – Jul 2011 |
| Webster Field Unit G-3-172622 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 188K | Mar 1999 – Jul 2026 |
| Webster Field Unit G-3-172623 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 5.47M | Mar 1999 – Aug 2019 |
| Webster Field Unit G-3-172624 | Exxon Mobil Corporation only | Webster | Harris | 1 | 0 | 592K | Mar 1999 – Jan 2007 |
| Webster Field Unit G-3-172631 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 4.08M | Mar 1999 – Jul 2026 |
| Webster Field Unit G-3-173245 | Denbury Onshore, LLC only | Webster | — | 1 | 0 | 16.2M | Apr 1999 – Jan 2013 |
| Webster Field Unit G-3-173825 | Exxon Mobil Corporation only | Webster | — | 1 | 0 | 1.21M | Jul 1999 – Jun 2001 |
| Webster Field Unit G-3-174202 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 12.3M | Jul 1999 – Jul 2026 |
| Webster Field Unit G-3-174203 | Exxon Corp. only | Webster | Harris | 1 | 0 | 379K | Jul 1999 – Dec 1999 |
| Webster Field Unit G-3-174647 | Exxon Mobil Corporation only | Webster | Harris | 1 | 0 | 9.04M | Sep 1999 – Mar 2003 |
| Webster Field Unit G-3-174648 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 2.35M | Sep 1999 – Dec 2013 |
| Webster Field Unit G-3-174649 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 5.91M | Sep 1999 – Jul 2026 |
| Webster Field Unit G-3-174650 | Denbury Onshore, LLC only | Webster | — | 1 | 0 | 4.66M | Sep 1999 – Feb 2014 |
| Webster Field Unit G-3-174999 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 13.9M | Oct 1999 – Jul 2026 |
| Webster Field Unig G-3-175120 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 7.19M | Oct 1999 – Jul 2026 |
| Webster Field Unit G-3-175129 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 11.8M | Nov 1999 – Jan 2014 |
| Webster Field Unit G-3-175641 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 2.69M | Dec 1999 – Jul 2026 |
| Webster Field Unit G-3-175643 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 3.58M | Dec 1999 – Apr 2013 |
| Webster Field Unit G-3-176026 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 1.03M | Dec 1999 – Jul 2026 |
| Webster Field Unit G-3-176027 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 5.82M | Dec 1999 – Jul 2026 |
| Webster Field Unit G-3-176314 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 7.29M | Dec 1999 – Jul 2026 |
| Webster Field Unit G-3-176674 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 1.26M | Jan 2000 – Jul 2026 |
| Webster Field Unit G-3-176676 | Exxon Mobil Corporation only | Webster | Harris | 1 | 0 | 866K | Feb 2000 – Feb 2002 |
| Webster Field Unit G-3-177141 | Exxon Mobil Corporation only | Webster | — | 1 | 0 | 846K | Feb 2000 – Jun 2010 |
| Webster Field Unit G-3-177183 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 3.38M | Feb 2000 – Jul 2026 |
| Webster Field Unit G-3-177533 | Exxon Mobil Corporation only | Webster | — | 1 | 0 | 5.56M | Mar 2000 – Sep 2012 |
| Webster Field Unit G-3-177630 | Exxon Mobil Corporation only | Webster | Harris | 1 | 0 | 344K | May 2000 – Jun 2002 |
| Webster Field Unit G-3-178239 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 93.6K | May 2000 – Jul 2026 |
| Webster Field Unit G-3-178416 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 696K | Jun 2000 – Jul 2026 |
| Webster Field Unit G-3-178418 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 2.86M | Jun 2000 – May 2018 |
| Webster Field Unit G-3-178419 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 709K | Jun 2000 – Jul 2026 |
| Webster Field Unit G-3-179196 | Denbury Onshore, LLC only | Webster | — | 1 | 0 | 3.5M | Jul 2000 – Jul 2015 |
| Webster Field Unit G-3-179926 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 1.38M | Aug 2000 – Jul 2026 |
| Webster Field Unit G-3-180186 | P.o.&g. Operating, LLC only | Webster | — | 1 | 0 | 352K | Oct 2000 – Jul 2026 |
| Webster Field Unit G-3-180272 | Denbury Onshore, LLC only | Webster | Harris | 1 | 0 | 7.07M | Sep 2000 – Dec 2021 |
| Webster Field Unit G-3-180723 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 307K | Dec 2000 – Jul 2026 |
| Webster Field Unit G-3-180724 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 1.23M | Dec 2000 – Jul 2026 |
| Webster Field Unit G-3-182097 | Exxon Mobil Corporation only | Webster | — | 1 | 0 | 171K | Mar 2001 – Jul 2012 |
| Webster Field Unit G-3-182412 | Denbury Onshore, LLC only | Webster | — | 1 | 0 | 148K | Mar 2001 – Jun 2014 |
| Webster Field Unit G-3-184014 | P.o.&g. Operating, LLC only | Webster | Harris | 1 | 0 | 1.12K | Jun 2001 – Jul 2026 |