EAST PENA CREEK UNIT

Oil // district 1 // lease#4317

op: TXCO RESOURCES INC.

cum_oil

500k BBL

cum_gas

0 MCF

wells

55

production

1993-01 — 2026-03

peak_month

1997-03

-- production_history

cum_oil: 499,878 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,332 BBL/mo

Di (annual)

37.9%

b-factor

1.4

EUR

416,276 BBL

R-squared

0.732

type

hyperbolic

-- wells (55)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
53EXPLORATION COMPANY, THE13,6002003-06-19
49EXPLORATION COMPANY, THE13,6002003-03-11
50EXPLORATION COMPANY, THE13,6002003-03-11
51EXPLORATION COMPANY, THE13,6002003-03-11
52EXPLORATION COMPANY, THE13,6002003-02-21
205CONOCO INC.13,5001991-05-30
46CONOCO INC.13,5001991-05-29
39MOBIL PRODUCING TX. & N.M. INC.13,8001988-01-11
19MOBIL PRODUCING TX. & N.M. INC.13,4501987-04-20
43MOBIL PRODUCING TX. & N.M. INC.13,8001987-01-07
44MOBIL PRODUCING TX. & N.M. INC.23,8001987-01-07
37SUPERIOR OIL COMPANY, THE13,8001986-02-18
38SUPERIOR OIL COMPANY, THE13,8001986-02-18
36SUPERIOR OIL COMPANY, THE13,8001985-11-27
1042-127-30588--------
10342-127-30520--------
10442-127-30519--------
10742-127-30516--------
10842-127-30515--------
1142-127-30598--------
1242-127-30602--------
1342-127-30601--------
1442-127-30604--------
1542-127-30611--------
1642-127-30619--------
1742-127-30620--------
1842-127-30625--------
242-127-30402--------
2042-127-30631--------
20142-127-30605--------
20242-127-30606--------
20342-127-30607--------
20442-127-30614--------
2142-127-30630--------
2242-127-30634--------
2442-127-30690--------
2742-127-30697--------
2842-127-30705--------
2942-127-30703--------
342-127-30406--------
3042-127-30877--------
30142-127-30468--------
30242-127-30467--------
3142-127-30878--------
3242-127-30879--------
3342-127-30927--------
3442-127-30930--------
3542-127-30931--------
442-127-30568--------
40142-127-30439--------
542-127-30569--------
642-127-30581--------
742-127-30585--------
842-127-30590--------
942-127-30589--------
EOF // data source: Texas Railroad Commission // 2026