DUFF, A. H. ESTATE "A"

Oil · District 7C · Lease #8045

Operator: UNION PACIFIC RESOURCES COMPANY

Cum Oil

87k BBL

Cum Gas

2.1M MCF

casinghead

Wells

9

Production

1993-01 — 2026-04

Peak Month

1997-10

Production History

Cum Oil: 86,657 BBL Cum Gas: 2,124,907 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

481 BBL/mo

Di (annual)

7.5%

b-factor

0.0

EUR

75,295 BBL

R-squared

0.709

type

exponential

Operator History (from monthly production reports)

2007-09 — 2026-07 TREK RESOURCES, INC. 227 mo
2001-12 — 2007-08 MONTGOMERY PETROLEUM, INC. 69 mo
1996-01 — 2001-11 MJM OIL & GAS, INC. 71 mo
1995-10 — 1995-12 MONTGOMERY PETROLEUM, INC. 3 mo
1993-01 — 1995-09 UNION PACIFIC RESOURCES COMPANY 33 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9TREK RESOURCES, INC.16,8001997-05-30
2TREK RESOURCES, INC.37,0001990-03-29
6TREK RESOURCES, INC.37,0001989-10-18
7TREK RESOURCES, INC.17,0001987-10-30
8TREK RESOURCES, INC.17,0001987-10-30
5TREK RESOURCES, INC.17,0001980-01-14
4TREK RESOURCES, INC.17,0001979-12-14
3TREK RESOURCES, INC.17,0001979-12-13
1TREK RESOURCES, INC.17,0001979-09-27