| Wiemers, C.T. -A- O-1-11211 | Somerset | Atascosa | 24 | 28.2K | 5 | Jun 1994 – Feb 2014 | Petrosaurus, Inc. |
| Webb-A- O-1-11365 | Somerset | Atascosa | 23 | 18.5K | 12 | Oct 1993 – Feb 2014 | Petrosaurus, Inc. |
| Williams, Minnie E. O-1-10946 | Somerset | Bexar | 19 | 16.9K | 12 | Oct 1993 – Feb 2014 | Petrosaurus, Inc. |
| Winn O-1-11068 | Somerset | Bexar | 36 | 11K | 8 | Oct 1993 – Feb 2014 | Petrosaurus, Inc. |
| Nichols, Lucy O-1-10856 | Somerset | Atascosa | 12 | 10.8K | 12 | Oct 1993 – Feb 2014 | Petrosaurus, Inc. |
| Gorden S. -A- O-1-11001 | Somerset | Bexar | 28 | 9.57K | 3 | Jan 1994 – Feb 2014 | Petrosaurus, Inc. |
| Bennett O-1-10974 | Somerset | Bexar | 14 | 6.94K | 6 | Oct 1993 – Feb 2014 | Petrosaurus, Inc. |
| Mireles, Jesus O-1-10858 | Somerset | Atascosa | 17 | 16.2K | 12 | Oct 1993 – Sep 2013 | Petrosaurus, Inc. |
| Ernst, Katie L. O-1-3113 | Somerset | Bexar | 23 | 48.4K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Eastwood, E. -B- O-1-2011 | Somerset | Bexar | 24 | 47.8K | 0 | Feb 1995 – Aug 2013 | Koko Skadi, LLC |
| James, Wm. O-1-2697 | Somerset | Bexar | 13 | 38.1K | 0 | Feb 1995 – Aug 2013 | Koko Skadi, LLC |
| Hoffman, Herman O-1-3197 | Somerset | Bexar | 13 | 37.3K | 0 | Feb 1995 – Aug 2013 | Drachen Energy Co. |
| Putman, P. W., Etal O-1-1638 | Somerset | Atascosa | 16 | 26.7K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Kenney, Albert & John O-1-2824 | Somerset | Bexar | 12 | 24.9K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Bailey, James M. O-1-11208 | Somerset | Atascosa | 10 | 21K | 4 | Jun 1994 – Aug 2013 | Petrosaurus, Inc. |
| Hayes, Richard O-1-10869 | Somerset | Bexar | 3 | 20.2K | 0 | Feb 1995 – Aug 2013 | Drachen Oil Company |
| Federal Royalty Co., Etal -B- O-1-1614 | Somerset | Bexar | 12 | 14.7K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Malven, Chas. W. O-1-3251 | Somerset | Bexar | 5 | 13.6K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Gutierrez, Felipe O-1-7438 | Somerset | Atascosa | 3 | 13.2K | 0 | Feb 1995 – Aug 2013 | Mssk Consulting LLC |
| Tick, Steve O-1-10947 | Somerset | Bexar | 6 | 12.1K | 12 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Rick -A- O-1-11044 | Somerset | Atascosa | 16 | 12K | 11 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Wood, Mae Lue O-1-5862 | Somerset | Atascosa | 2 | 11.4K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Rodriguez, Augustin O-1-3217 | Somerset | Bexar | 4 | 11.3K | 0 | Feb 1995 – Aug 2013 | Drachen Oil Company |
| Wright, Emily O-1-11144 | Somerset | Bexar | 4 | 11.3K | 10 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Thorne, Lula O., Est O-1-3340 | Somerset | Bexar | 6 | 10.4K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Cline -D- O-1-10941 | Somerset | Bexar | 5 | 9.8K | 11 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Gutierrez, Inez, Est. Of O-1-6473 | Somerset | Atascosa | 3 | 9.58K | 0 | Feb 1995 – Aug 2013 | Drachen Oil Company |
| Stevens, R. W. O-1-5953 | Somerset | Atascosa | 2 | 8.07K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Federal Royalty Co., Etal -A- O-1-2084 | Somerset | Atascosa | 11 | 7.24K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Ilfrey & Wilkerson -B- O-1-9212 | Somerset | Atascosa | 4 | 6.92K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Fowler, B. K. O-1-1616 | Somerset | Atascosa | 6 | 6.53K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Eastwood, E. -A- O-1-2246 | Somerset | Atascosa | 3 | 6.25K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Hoffman, Frank H. O-1-3140 | Somerset | Bexar | 7 | 5.93K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Fowler, B. K., Etal -D- O-1-1619 | Somerset | Atascosa | 3 | 5.8K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Brandt, Herbert C. O-1-10831 | Somerset | Atascosa | 3 | 5.5K | 4 | Jun 1994 – Aug 2013 | Petrosaurus, Inc. |
| Bailey, Everett N. O-1-10832 | Somerset | Atascosa | 4 | 5.01K | 4 | Jun 1994 – Aug 2013 | Petrosaurus, Inc. |
| Torres, A. O-1-8813 | Somerset | Bexar | 1 | 4.8K | 10 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Hooker, H. O-1-10322 | Somerset | Bexar | 1 | 4.03K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Armstrong O-1-11150 | Somerset | Bexar | 2 | 3.98K | 12 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Fowler, Floyd J. O-1-5716 | Somerset | Bexar | 3 | 3.45K | 0 | Feb 1995 – Aug 2013 | Petrosaurus, Inc. |
| Bailey, E.N. O-1-10833 | Somerset | Atascosa | 1 | 3.26K | 3 | Jun 1994 – Aug 2013 | Petrosaurus, Inc. |
| Aguirre, Leonardo B. O-1-11207 | Somerset | Atascosa | 2 | 3.21K | 4 | Jun 1994 – Aug 2013 | Petrosaurus, Inc. |
| Hood, Lloyd E. O-1-11290 | Somerset | Bexar | 2 | 3.11K | 12 | Oct 1993 – Aug 2013 | Petrosaurus, Inc. |
| Garcia, A. C. O-1-1623 | Somerset | Atascosa | 5 | 2.8K | 0 | Mar 1995 – Aug 2013 | Petrosaurus, Inc. |
| Hoffman, Adolph O-1-10868 | Somerset | Bexar | 2 | 4.15K | 0 | Feb 1995 – Jul 2013 | Drachen Oil Company |
| Fowler, B. K. -B- O-1-1617 | Somerset | Atascosa | 2 | 2.94K | 0 | Feb 1995 – Jul 2013 | Petrosaurus, Inc. |
| Fowler, B. K., Etal -C- O-1-1618 | Somerset | Atascosa | 3 | 3.37K | 0 | Feb 1995 – Jun 2013 | Petrosaurus, Inc. |
| Vaughn, Alva E. O-1-11146 | Somerset | Bexar | 1 | 1.39K | 12 | Oct 1993 – Apr 2012 | off the schedule |
| Little, Jesse O-1-5976 | Somerset | Atascosa | 3 | 4.27K | 0 | Feb 1995 – Feb 2012 | off the schedule |
| Gutierrez, Inez -B- O-1-9806 | Somerset | Atascosa | 1 | 1.82K | 0 | Mar 1995 – Nov 2011 | Petrosaurus, Inc. |