< leases

SUMMER BROOKS UNIT

Oil · District 03 · Lease #18360

Operator: UNION PACIFIC RESOURCES COMPANY

Fields: GIDDINGS (AUSTIN CHALK-3)

Cum Oil

143k BBL

Cum Gas

975k MCF

casinghead

Wells

2

Production

1993-01 — 2026-02

Peak Month

1994-01

Production History

Cum Oil: 142,656 BBL Cum Gas: 975,147 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,906 BBL/mo

Di (annual)

28.9%

b-factor

0.2

EUR

149,947 BBL

R-squared

0.724

type

hyperbolic

Operator History (from monthly production reports)

2018-08 — 2026-07 MAGNOLIA OIL & GAS OPERATING LLC 96 mo
2007-08 — 2018-07 ENERVEST OPERATING, L.L.C. 132 mo
2002-12 — 2007-07 ANADARKO E&P COMPANY LP 56 mo
2001-02 — 2002-11 RME PETROLEUM COMPANY 22 mo
1997-09 — 2001-01 UNION PACIFIC RESOURCES COMPANY 41 mo
1997-01 — 1997-08 ROSEWOOD RESOURCES, INC. 8 mo
1994-01 — 1996-12 SNYDER OIL CORPORATION 36 mo
1993-10 — 1993-12 UNION PACIFIC RESOURCES COMPANY 3 mo
1993-01 — 1993-09 SNYDER OIL CORPORATION 9 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
142-477-30613MAGNOLIA OIL & GAS OPERATING LLC210,8001993-11-02
1 H42-477-30613MAGNOLIA OIL & GAS OPERATING LLC210,8001993-11-02