WALTON

Oil · District 08 · Lease #25713

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

88k BBL

Cum Gas

84k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1993-03

Production History

Cum Oil: 87,514 BBL Cum Gas: 83,685 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

437 BBL/mo

Di (annual)

23.5%

b-factor

0.0

EUR

22,208 BBL

R-squared

0.452

type

exponential

Operator History (from monthly production reports)

2024-08 — 2026-07 OXYROCK OPERATING, LLC 24 mo

2020-04 — 2024-07 CROWNQUEST OPERATING, LLC 52 mo

2008-08 — 2020-03 PARSLEY ENERGY OPERATIONS, LLC 140 mo

2003-12 — 2008-07 MOMENTUM ENERGY CORPORATION 56 mo

2002-09 — 2003-11 MOMENTUM ENERGY, LLC 15 mo

2000-12 — 2002-08 PARKER & PARSLEY ACQ. GROUP LLC 21 mo

2000-02 — 2000-11 PARKER & PARSLEY OPERATING LLC 10 mo

1999-02 — 2000-01 OGA OPERATING L.L.C. 12 mo

1997-09 — 1999-01 PIONEER NATURAL RES. USA, INC. 17 mo

1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo

1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-173-31032	OXYROCK OPERATING, LLC	1	9,200	1979-11-28

WALTON

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 (1)

Production History