KEYSTONE CATTLE COMPANY

Oil // district 10 // lease#29385

op: STRONGHOLD ENERGY II OPER, LLC

cum_oil

449k BBL

cum_gas

0 MCF

wells

28

production

1993-01 — 2026-03

peak_month

2001-08

-- production_history

cum_oil: 449,441 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

4,922 BBL/mo

Di (annual)

18.3%

b-factor

0.0

EUR

322,990 BBL

R-squared

0.718

type

exponential

-- wells (28)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1010FDEVON ENERGY PRODUCTION CO, L.P.14,8002001-09-28
604FDEVON ENERGY PRODUCTION CO, L.P.14,8002001-08-15
606NDEVON ENERGY PRODUCTION CO, L.P.14,8002001-08-15
1005GDEVON ENERGY PRODUCTION CO, L.P.14,8002001-08-13
1006ADEVON ENERGY PRODUCTION CO, L.P.14,8002001-08-13
1009KDEVON ENERGY PRODUCTION CO, L.P.14,8002001-08-13
1008GDEVON ENERGY PRODUCTION CO, L.P.14,8002001-06-14
1007BDEVON ENERGY PRODUCTION CO, L.P.14,8002001-03-07
1002IDEVON ENERGY PRODUCTION CO, L.P.14,8002001-02-27
1003ADEVON ENERGY PRODUCTION CO, L.P.14,8002001-02-27
1004PDEVON ENERGY PRODUCTION CO, L.P.14,8002001-02-27
602DDEVON ENERGY PRODUCTION CO, L.P.14,8002001-02-27
601MDEVON ENERGY PRODUCTION CO, L.P.14,5002000-09-05
1001HDEVON ENERGY PRODUCTION CO, L.P.14,8002000-08-15
373GULF OIL CORP.26,5001985-12-31
375GULF OIL CORP.14,8501985-06-11
374GULF OIL CORP.14,8501985-04-24
369GULF OIL CORP.14,8501985-02-22
370GULF OIL CORP.14,8501985-02-22
371GULF OIL CORP.14,8501985-02-22
368GULF OIL CORP.14,8501985-02-21
366GULF OIL CORP.14,8001985-01-21
367GULF OIL CORP.14,8001985-01-21
364GULF OIL CORP.14,8001984-11-20
365GULF OIL CORP.14,8001984-11-20
360GULF OIL CORP.14,8501984-09-06
363GULF OIL CORP.14,8201984-09-06
359GULF OIL CORP.14,5201982-12-15
EOF // data source: Texas Railroad Commission // 2026