| 1 | Z ABNEY | Caddo Parish, LA | Oil Property | Oct 2018 |
| 2 | Z BAR | Woods County, OK | Oil & Gas Property | Dec 2015 |
| 3 | Z L DANIEL GAS UNIT | Panola County, TX | Gas Property | Jan 2019 |
| 4 | Z&T 20 | Loving County, TX | Oil & Gas Property | Mar 2019 |
| 5 | Z&T 32 | Loving County, TX | Oil & Gas Property | Mar 2019 |
| 6 | Z&T 42 | Loving County, TX | Oil & Gas Property | Mar 2019 |
| 7 | Z-28 STATE UNIT | Chaves County, NM | Oil & Gas Property | Jan 2014 |
| 8 | Z-JOE | Le Flore County, OK | Gas Property | Feb 2019 |
| 9 | Z.A (CITY OF ZANESVILLE) | Muskingum County, OH | Oil & Gas Property | Dec 2018 |
| 10 | ZABKA | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 11 | ZABKA K 2 | Weld County, CO | Oil & Gas Property | Jan 2019 |
| 12 | ZABOLOTNY | Billings County, ND | Oil & Gas Property | Apr 2019 |
| 13 | ZABOLOTNY OBSERVATION | Billings County, ND | Oil & Gas Property | Apr 2019 |
| 14 | ZACAWEISTA UNIT | Wilbarger County, TX | Oil & Gas Property | Mar 2019 |
| 15 | ZACH | Parker County, TX | Gas Property | Mar 2019 |
| 16 | ZACH C 11 | Weld County, CO | Oil & Gas Property | Sep 2016 |
| 17 | ZACH MCCORMICK FEDERAL COM | Eddy County, NM | Oil & Gas Property | Dec 2018 |
| 18 | ZACHARY | Clay County, TX | Oil & Gas Property | Mar 2019 |
| 19 | ZACHARY | Winkler County, TX | Oil & Gas Property | Feb 2019 |
| 20 | ZACHARY | Montague County, TX | Oil & Gas Property | Mar 2019 |
| 21 | ZACHARY | San Juan County, NM | Oil & Gas Property | Jan 2019 |
| 22 | ZACHER 1-24H | Mountrail County, ND | Oil & Gas Property | Apr 2019 |
| 23 | ZACHERL UNIT 1H | Butler County, PA | Gas Property | Apr 2019 |
| 24 | ZACHERY 14-10H | McKenzie County, ND | Oil & Gas Property | Apr 2019 |
| 25 | ZACHGO | Logan County, OK | Gas Property | Jun 2015 |
| 26 | ZACHOR | Toole County, MT | Oil Property | Mar 2019 |
| 27 | ZACHRY | San Juan County, NM | Oil & Gas Property | Jan 2019 |
| 28 | ZACHRY | Zapata County, TX | Gas Property | Mar 2019 |
| 29 | ZACHRY | Webb County, TX | Gas Property | Mar 2019 |
| 30 | ZACHRY | Zapata County, TX | Gas Property | Mar 2019 |
| 31 | ZACHRY, E. B | Zapata County, TX | Gas Property | Mar 2019 |
| 32 | ZACK | Texas County, OK | Gas Property | Apr 2019 |
| 33 | ZACKIE WALTERS | Grady County, OK | Oil & Gas Property | Dec 2015 |
| 34 | ZACKRY H. C | Clay County, TX | Oil & Gas Property | Mar 2019 |
| 35 | ZACOUR | Armstrong County, PA | Gas Property | Dec 2018 |
| 36 | ZACREP 2-11 #1H | Williams County, ND | Oil & Gas Property | Apr 2019 |
| 37 | ZADA CHAPMAN | Young County, TX | Oil Property | Mar 2019 |
| 38 | ZADEL | Weld County, CO | Oil & Gas Property | Oct 2018 |
| 39 | ZADOW | Richland County, MT | Oil & Gas Property | Apr 2019 |
| 40 | ZAESKE-ECKOLS UNIT | Karnes County, TX | Oil & Gas Property | Mar 2019 |
| 41 | ZAFT, VALENTINE | Gilmer County, WV | Oil & Gas Property | Dec 2017 |
| 42 | ZAGER | Weston County, WY | Oil & Gas Property | Apr 2019 |
| 43 | ZAHN | Lamb County, TX | Oil & Gas Property | Mar 2019 |
| 44 | ZAHORSKY | Woods County, OK | Gas Property | Nov 2015 |
| 45 | ZAHORSKY | Woods County, OK | Gas Property | Apr 2019 |
| 46 | ZAHOUREK | Weld County, CO | Oil & Gas Property | Feb 2019 |
| 47 | ZAHURSKY | Clearfield County, PA | Gas Property | Dec 2018 |
| 48 | ZAIN 26 | Upton County, TX | Oil & Gas Property | Mar 2019 |
| 49 | ZAIONTZ A | Karnes County, TX | Oil & Gas Property | Mar 2019 |
| 50 | ZAIT | Eddy County, NM | Oil Property | Jan 2019 |
| 51 | ZAKAIB, PAUL JR | Kanawha County, WV | Oil Property | Sep 2002 |
| 52 | ZALAC | Fayette County, PA | Gas Property | Apr 2019 |
| 53 | ZALESKI | Bradford County, PA | Gas Property | Mar 2019 |
| 54 | ZALESKY | Stark County, ND | Oil & Gas Property | Apr 2019 |
| 55 | ZALMAN | Lavaca County, TX | Gas Property | Mar 2019 |
| 56 | ZALOUDEK | Garfield County, OK | Gas Property | Oct 2018 |
| 57 | ZALOUDEK | Garfield County, OK | Oil & Gas Property | Mar 2019 |
| 58 | ZALOUDEK | Garfield County, OK | Gas Property | Mar 2019 |
| 59 | ZALOUDIK | Canadian County, OK | Gas Property | Feb 2010 |
| 60 | ZAMBESI | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 61 | ZAMBRUSKI | Nowata County, OK | Gas Property | Nov 2015 |
| 62 | ZAMORA | Hidalgo County, TX | Oil & Gas Property | Mar 2019 |
| 63 | ZAMORA | Webb County, TX | Gas Property | Aug 2016 |
| 64 | ZAMORA | Starr County, TX | Gas Property | Mar 2019 |
| 65 | ZAMORA UNIT | Hidalgo County, TX | Gas Property | Mar 2019 |
| 66 | ZAMORA UNIT I | La Salle County, TX | Oil & Gas Property | Mar 2019 |
| 67 | ZAMORA WEST UNIT LAS | La Salle County, TX | Oil & Gas Property | Mar 2019 |
| 68 | ZANE 32-24H | Dunn County, ND | Oil & Gas Property | Apr 2019 |
| 69 | ZANE ABS FEDERAL | Chaves County, NM | Oil & Gas Property | Jan 2019 |
| 70 | ZANE E IRVIN | Clearfield County, PA | Gas Property | Dec 2018 |
| 71 | ZANETTI | Solano County, CA | Oil & Gas Property | Sep 2001 |
| 72 | ZANGER | Miller County, AR | Oil Property | Apr 2019 |
| 73 | ZANOLINI | Fresno County, CA | Oil & Gas Property | May 2004 |
| 74 | ZANT | Howard County, TX | Oil & Gas Property | Mar 2019 |
| 75 | ZANT | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 76 | ZANT | Glasscock County, TX | Oil & Gas Property | Mar 2019 |
| 77 | ZANT-HURT-BLALOCK UNIT 1 | Glasscock County, TX | Oil & Gas Property | Mar 2019 |
| 78 | ZAPATA BQZ STATE COM | Lea County, NM | Oil & Gas Property | Jan 2019 |
| 79 | ZAPATA TOWNSITE | Zapata County, TX | Gas Property | Mar 2019 |
| 80 | ZAPP | La Salle County, TX | Gas Property | Mar 2019 |
| 81 | ZAPP ESTATE ET AL D | Harris County, TX | Oil & Gas Property | Jan 1998 |
| 82 | ZAPPA | San Juan County, NM | Gas Property | Jan 2019 |
| 83 | ZAPPA | Claiborne Parish, LA | Oil & Gas Property | Aug 2018 |
| 84 | ZAPPE MARIE | Chambers County, TX | Oil & Gas Property | Mar 2019 |
| 85 | ZAPPE UNIT | Gonzales County, TX | Oil & Gas Property | Mar 2019 |
| 86 | ZAPPI CONSTANCE | Washington County, PA | Oil & Gas Property | Apr 2019 |
| 87 | ZAPPI EDWARD UNIT | Washington County, PA | Gas Property | Apr 2019 |
| 88 | ZAPPI PETE UNIT | Washington County, PA | Gas Property | Apr 2019 |
| 89 | ZARAFA FF FEDERAL | Eddy County, NM | Oil & Gas Property | Oct 2014 |
| 90 | ZARAK | Stark County, ND | Oil Property | Sep 1971 |
| 91 | ZARGON ET AL TRURO TMU 2HZ 21 | Renville County, ND | Oil Property | Apr 2019 |
| 92 | ZARGON HMU | Bottineau County, ND | Oil & Gas Property | Apr 2019 |
| 93 | ZARGON MACKOBEE | Renville County, ND | Oil & Gas Property | Apr 2019 |
| 94 | ZARGON TMU TRURO 18 HZ | Renville County, ND | Oil Property | Apr 2019 |
| 95 | ZARGON TRURO TMU | Renville County, ND | Oil Property | Apr 2019 |
| 96 | ZARLENGO | Adams County, CO | Oil & Gas Property | Mar 2019 |
| 97 | ZARLENGO | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 98 | ZARSKY | Starr County, TX | Oil & Gas Property | Mar 2019 |
| 99 | ZARSKY | Starr County, TX | Gas Property | Mar 2019 |
| 100 | ZATTU CUSHING | Lea County, NM | Oil & Gas Property | Jan 2019 |