Estimated Value by Well
The wells driving the estimated value of Mary Lou Zapp's mineral portfolio.
Estimated values combine recorded decimal interests with recent well production.
Get a firm cash offer for these mineral and royalty interests. We review your production history and respond within two business days.
Production History & Forecast
Combined monthly oil and gas production from the most active wells associated with Mary Lou Zapp, with a 36-month decline-curve forecast.
Source: Railroad Commission of Texas lease production filings. Condensate volumes are reported with gas. The dashed forecast is a decline curve fitted to the production history — an estimate, not a guarantee of future production.
Interests Held By Mary Lou Zapp
Royalty and mineral interests from the 2024 county tax roll, matched to producing oil and gas wells. Sorted by estimated value.
| # | Property | County | Operator | Interest | Type | Est. Value |
|---|---|---|---|---|---|---|
| 1 | WEEKS D UNIT E 1H API 28332978 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.033159 | R | $14,138.02 |
| 2 | ZAPP A 2H API 28332972 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.041667 | R | $6,004.37 |
| 3 | ZAPP A 3H API 28332774 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.041667 | R | $3,968.31 |
| 4 | ZAPP G 1H API 28333468 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.041667 | R | $1,687.04 |
| 5 | ZAPP G 2H API 28333477 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.041667 | R | $1,494.12 |
| 6 | CRISP H UNIT 3H API 28334011 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.013867 | R | $614.33 |
| 7 | ZAPP A 1H API 28333209 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.041667 | R | $546.99 |
| 8 | WEEKS C UNIT C 3H API 28333533 | La Salle County, TX | REPSOL OIL & GAS USA LLC | 0.000160 | R | $0.49 |
| 9 | BRIGGS RANCH D 7H API 28333010 | La Salle County, TX | EP ENERGY E&P COMPANY L.P. | 0.001256 | R | — |
| 10 | BRIGGS RANCH D & E UNIT E 8H API 28333061 | La Salle County, TX | EP ENERGY E&P COMPANY L.P. | 0.010417 | R | — |
| 11 | BRIGGS ZAPP ALLOCATION C 103H API 28336728 | La Salle County, TX | EP ENERGY E&P COMPANY L.P. | 0.019381 | R | — |
| 12 | BRIGGS ZAPP ALLOCATION D 104H API 28336729 | La Salle County, TX | EP ENERGY E&P COMPANY L.P. | 0.020137 | R | — |
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