GRAMSTORFF (UPPER MORROW)

Oil // district 14 // lease#7083

op: VINTAGE PETROLEUM, INC.

cum_oil

2.1M BBL

cum_gas

0 MCF

wells

14

production

1996-01 — 2026-03

peak_month

2013-05

-- production_history

cum_oil: 2,092,496 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

25,896 BBL/mo

Di (annual)

16.7%

b-factor

0.0

EUR

1,862,066 BBL

R-squared

0.879

type

exponential

-- wells (14)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
105CHAPARRAL ENERGY, L.L.C.18,1492014-05-09
605CHAPARRAL ENERGY, L.L.C.28,2332014-03-07
601TXO PRODUCTION CORP.28,3501985-10-18
2059SLAWSON, DONALD C.18,4001985-03-22
501H & L OPERATING COMPANY18,4001983-12-30
104TXO PRODUCTION CORP.18,4501983-11-18
602TXO PRODUCTION CORP.18,3501983-10-06
103L & M OIL CO.18,4501983-09-19
3L & M OIL CO.18,3501983-09-19
102TXO PRODUCTION CORP.18,4501983-03-16
2TXO PRODUCTION CORP.18,3501982-12-03
101TXO PRODUCTION CORP.18,4501982-08-24
201SLAWSON, DONALD C.18,3001982-07-29
1TXO PRODUCTION CORP.18,4501982-05-19
EOF // data source: Texas Railroad Commission // 2026