| White, P. E., -B- O-4-5624 | Killam Oil Co., Ltd. only | Lundell (Mirando No. 1) | Duval | 28 | 841K | 27.4K | by Jan 1993 – Aug 2026 |
| Duval Ranch -59- O-4-1138 | Killam Oil Co., Ltd. only | Govt. Wells, South | Duval | 21 | 799K | 21 | by Jan 1993 – Aug 2026 |
| DCR-State 366/76/64/54 O-4-12087 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 26 | 657K | 12.3K | by Jan 1993 – Aug 2026 |
| Duval Ranch, Sec. # 257 a/C 1 O-4-1702 | Killam Oil Co., Ltd. only | Lundell (Pettus) | Duval | 6 | 477K | 19.1K | by Jan 1993 – Jan 2026 |
| White, P. E. -B- O-4-1694 | Killam Oil Co., Ltd. only | Lundell | Duval | 14 | 447K | 50.5K | by Jan 1993 – Aug 2026 |
| Texaco- Exxon Tomas Fee O-4-11838 | Ragars Oil & Gas Co. only | Govt. Wells, N. | Duval | 7 | 411K | 606 | by Jan 1993 – Aug 2026 |
| Hahl, C. W., Etal O-4-1090 | Aurora Resources Corporation only | Govt. Wells, N. | Duval | 34 | 307K | 1.78K | by Jan 1993 – Jun 2020 |
| Wiederkehr, L. O-4-1101 | Black Gold Operating Co, LLC only | Govt. Wells, N. | Duval | 44 | 291K | 113K | by Jan 1993 – Jul 2026 |
| White, P. E. -B- O-4-5627 | Killam Oil Co., Ltd. only | Lundell (Mirando No. 2) | Duval | 6 | 260K | 20.8K | by Jan 1993 – Aug 2026 |
| Killam "257" O-4-12458 | Killam Oil Co., Ltd. only | Lundell | Duval | 8 | 250K | 0 | May 1995 – Aug 2026 |
| State O-4-1126 | 3D Oil Company, LLC only | Govt. Wells, South | Duval | 11 | 234K | 21 | by Jan 1993 – Aug 2026 |
| Wilson, J. O. O-4-5819 | McGowan Working Partners, Inc. only | Lundell, S. (Mirando) | Duval | 5 | 213K | 60.5K | by Jan 1993 – Aug 2026 |
| Duvon, Nell M. O-4-1561 | Hilcorp Energy Company only | Loma Novia | Duval | 5 | 207K | 20 | by Jan 1993 – Aug 2026 |
| DCR-State 260 F O-4-12585 | Killam Oil Co., Ltd. only | Lundell | Duval | 7 | 203K | 0 | May 1996 – Aug 2026 |
| Dcrc MF NCT-64 O-4-7931 | Hilcorp Energy Company only | Lundell | Duval | 10 | 176K | 111 | by Jan 1993 – Aug 2026 |
| Lundell-State 140 O-4-12937 | Killam Oil Co., Ltd. only | Lundell | Duval | 5 | 165K | 0 | Apr 2000 – Aug 2026 |
| Lundell, E. C. O-4-1124 | 3D Oil Company, LLC only | Govt. Wells, South | Duval | 10 | 160K | 144 | by Jan 1993 – Aug 2026 |
| Barton O-4-14100 | Bridwell Oil Co. only | Vaello (Tedlie) | Duval | 2 | 160K | 0 | Oct 2018 – Aug 2026 |
| DCR-State 260 O-4-12385 | Killam Oil Co., Ltd. only | Lundell | Duval | 4 | 156K | 1 | Sep 1994 – Oct 2025 |
| Magnolia-Duval Ranch Sec. 208-09 O-4-1083 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 7 | 136K | 57 | by Jan 1993 – Aug 2026 |
| Bishop Duval Land Co., NCT-1 O-4-1151 | Hilcorp Energy Company only | Govt. Wells, South | Duval | 5 | 124K | 19 | by Jan 1993 – Mar 2024 |
| Texaco Fee 207 O-4-12941 | Mountain V Texas, LLC only | Govt. Wells, N. | Duval | 5 | 120K | 20.1K | May 2000 – Jul 2026 |
| Hahl, C. W. O-4-1146 | Chumley, George Estate Of only | Govt. Wells, South | Duval | 4 | 118K | 447 | by Jan 1993 – Jul 2026 |
| Hahl, C. W. Co. -C- O-4-1139 | Providence Oil Prod. only | Govt. Wells, South | Duval | 4 | 116K | 324 | by Jan 1993 – Jul 2026 |
| Duval County Ranch Co. -B- O-4-1097 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 7 | 108K | 21 | by Jan 1993 – Aug 2026 |
| DCR-State 76/52 O-4-12064 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 5 | 108K | 6.46K | by Jan 1993 – Jan 2020 |
| Moody, L. B. O-4-1130 | Hilcorp Energy Company only | Govt. Wells, South | Duval | 4 | 107K | 111 | by Jan 1993 – Aug 2026 |
| Johnson, J. T. O-4-1081 | Providence Oil Prod. only | Govt. Wells, N. | Duval | 2 | 93.8K | 345 | by Jan 1993 – Jul 2026 |
| Humble-Duval Ranch Sec 204 O-4-11211 | Southwest Royalties, Inc. only | Petrox (Government Wells) | Duval | 4 | 89.2K | 34.3K | by Jan 1993 – Jun 2006 |
| Duval Ranch, Sec. #58 O-4-1696 | Caribbean Energy LLC II only | Lundell | Duval | 9 | 89.2K | 21 | by Jan 1993 – Aug 2026 |
| Duval Ranch -D- O-4-1093 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 4 | 87.6K | 152 | by Jan 1993 – Aug 2026 |
| Wostal State O-4-13984 | Paloma Operating, LLC only | Hoffman (Govt. Wells) | Duval | 2 | 78.1K | 0 | Aug 2014 – Aug 2026 |
| Duval Ranch O-4-1089 | Ragars Oil & Gas Co. only | Govt. Wells, N. | Duval | 6 | 64.8K | 115K | by Jan 1993 – Aug 2026 |
| DCR-State 76/52 O-4-12063 | Killam Oil Co., Ltd. only | Govt. Wells, N. (1740 Sand) | Duval | 4 | 64.5K | 2.8K | by Jan 1993 – Oct 2006 |
| Hahl, -A- O-4-1065 | Newman Operating Company only | Govt. Wells, N. | Duval | 3 | 62.9K | 111 | by Jan 1993 – Apr 2015 |
| DCR 257 O-4-12329 | Killam Oil Co., Ltd. only | Lundell | Duval | 2 | 59.6K | 7 | Mar 1994 – Aug 2026 |
| DCR-State 64-11 Oil Unit O-4-12257 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 55.3K | 923 | Sep 1993 – Aug 2026 |
| Hunt, C. E. O-4-1080 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 1 | 55.1K | 111 | by Jan 1993 – Aug 2026 |
| DCR-State 64-7 Oil Unit O-4-12222 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 53.8K | 2.1K | Jul 1993 – May 2025 |
| Lundell, Arthur O-4-1142 | 3D Oil Company, LLC only | Govt. Wells, South | Duval | 3 | 53.5K | 144 | by Jan 1993 – Aug 2026 |
| Wiederkehr, L. O-4-8371 | Black Gold Operating Co, LLC only | Govt. Wells, N. (Yegua 3250) | Duval | 10 | 52.7K | 5.6K | by Jan 1993 – May 2018 |
| Duval State 54 O-4-4867 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 4 | 50.7K | 25 | by Jan 1993 – Aug 2026 |
| DCR-State 64A O-4-12236 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 3 | 47.9K | 427 | Aug 1993 – Jun 2014 |
| Wiederkehr, L. O-4-7754 | Black Gold Operating Co, LLC only | Govt. Wells, N. (1800, W.) | Duval | 2 | 45.9K | 68.1K | by Jan 1993 – Sep 2020 |
| Parr, E. A. O-4-337 | Bridwell Oil Co. only | Bridwell | Duval | 5 | 44.6K | 9K | by Jan 1993 – Dec 2002 |
| Duval County Ranch Co. State "V" O-4-9932 | Killam Oil Co., Ltd. only | Lundell (Mirando No. 1) | Duval | 3 | 44.2K | 3.58K | by Jan 1993 – Aug 2026 |
| Govt. Wells, N. (1800 Aw&bw)unit O-4-8983 | Black Gold Operating Co, LLC only | Govt. Wells, N. (1800A,W) | Duval | 13 | 44K | 62K | by Jan 1993 – Jul 2026 |
| Duval County Ranch Co. -D- O-4-1098 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 2 | 43.3K | 21 | by Jan 1993 – Aug 2026 |
| Duval-State 54 O-4-4568 | Hilcorp Energy Company only | Govt. Wells, N. (1740 Sand) | Duval | 3 | 41.2K | 25 | by Jan 1993 – May 2025 |
| DCR-State 64-8 Oil Unit O-4-12220 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 40.1K | 1.17K | Jul 1993 – Aug 2026 |