DUGGER "A"

Oil · District 8A · Lease #65866

Operator: ROBERTSON RESOURCES, INC.

Cum Oil

144k BBL

Cum Gas

48k MCF

casinghead

Wells

1

Production

1993-01 — 2026-03

Peak Month

1996-04

Production History

Cum Oil: 144,077 BBL Cum Gas: 47,695 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

605 BBL/mo

Di (annual)

4.3%

b-factor

0.3

EUR

166,410 BBL

R-squared

0.787

type

hyperbolic

Operator History (from monthly production reports)

2025-03 — 2026-07 FLAT TOP OPERATING, LLC 17 mo
2020-02 — 2025-02 ROBERTSON RESOURCES, INC. 61 mo
2018-03 — 2020-01 BROOKS, BILLEE K. 23 mo
2004-05 — 2018-02 BROOKS, E. B., JR. 166 mo
1996-09 — 2004-04 EXCO RESOURCES, INC. 92 mo
1993-01 — 1996-08 MINERAL DEVELOPMENT, INC. 44 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1FLAT TOP OPERATING, LLC111,0001986-05-14