UNIVERSITY 4/BLK 43

Oil · District 7C · Lease #10977

Operator: TALL CITY OPERATIONS LLC

Fields: SPRABERRY (TREND AREA)

Cum Oil

9k BBL

Cum Gas

72k MCF

casinghead

Wells

2

Production

1993-01 — 2021-10

Peak Month

1998-04

Production History

Cum Oil: 9,087 BBL Cum Gas: 71,534 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

49 BBL/mo

Di (annual)

16.1%

b-factor

0.0

EUR

3,580 BBL

R-squared

0.423

type

exponential

Operator History (from monthly production reports)

2022-05 — 2023-02 EARTHSTONE OPERATING, LLC 10 mo

2021-02 — 2022-04 FDL OPERATING, LLC 15 mo

2019-01 — 2021-01 SABLE PERMIAN RESOURCES, LLC 25 mo

2017-07 — 2018-12 SABLE PERMIAN RESOURCES LAND,LLC 18 mo

2016-05 — 2017-06 PERMIAN RESOURCES, LLC 14 mo

2014-08 — 2016-04 AMERICAN ENERGY-PERM BASIN, LLC 21 mo

2013-08 — 2014-07 TALL CITY OPERATIONS LLC 12 mo

2013-06 — 2013-07 PALO PETROLEUM, INC. 2 mo

2010-12 — 2013-05 COPPERTOP 30 mo

1993-01 — 2010-11 FABCO 215 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-235-32152	FDL OPERATING, LLC	2	6,600	2011-11-08
2	42-235-32450	EARTHSTONE OPERATING LLC	1	6,500	1984-11-12

UNIVERSITY 4/BLK 43

Production HistoryBeta Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]

Decline Curve Analysis

Operator History (from monthly production reports)

Wells (2)

Production History