< leases

WINDHAM "4H"

Oil · District 7C · Lease #11389

Operator: MERIT ENERGY COMPANY

Fields: SPRABERRY (TREND AREA)

Cum Oil

266k BBL

Cum Gas

614k MCF

casinghead

Wells

9

Production

1993-01 — 2025-06

Peak Month

1999-07

Production History

Cum Oil: 266,418 BBL Cum Gas: 613,910 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,172 BBL/mo

Di (annual)

25.0%

b-factor

0.3

EUR

144,841 BBL

R-squared

0.866

type

hyperbolic

Operator History (from monthly production reports)

2025-05 — 2026-07 DIAMONDBACK E&P LLC 15 mo
2023-06 — 2025-04 DE IV OPERATING, LLC 23 mo
2018-02 — 2023-05 ENDEAVOR ENERGY RESOURCES L.P. 64 mo
2013-12 — 2018-01 HUNT OIL COMPANY 50 mo
2002-07 — 2013-11 MERIT ENERGY COMPANY 137 mo
2001-07 — 2002-06 DEVON ENERGY PRODUCTION CO, L.P. 12 mo
1998-01 — 2001-06 CONCHO RESOURCES INC. 42 mo
1997-02 — 1997-12 COSTILLA ENERGY, INC. 11 mo
1993-01 — 1997-01 COSTILLA PETROLEUM CORPORATION 49 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
842-461-33943DIAMONDBACK E&P LLC29,2501998-07-01
942-461-33944DIAMONDBACK E&P LLC29,2501998-07-01
742-461-32561DIAMONDBACK E&P LLC18,8001986-01-20
642-461-32517DIAMONDBACK E&P LLC19,2001985-11-19
542-461-32504DIAMONDBACK E&P LLC19,2001985-11-05
342-461-32492DIAMONDBACK E&P LLC19,2501985-10-08
442-461-32477DIAMONDBACK E&P LLC19,2501985-09-24
242-461-32419DIAMONDBACK E&P LLC19,2501985-06-20
142-461-32370DIAMONDBACK E&P LLC29,2501985-02-28