ULS 5-24

Oil · District 08 · Lease #40502

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

56k BBL

Cum Gas

167k MCF

casinghead

Wells

3

Production

2011-01 — 2026-04

Peak Month

2011-11

Production History

Cum Oil: 56,006 BBL Cum Gas: 167,105 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,045 BBL/mo

Di (annual)

43.7%

b-factor

0.6

EUR

59,462 BBL

R-squared

0.851

type

hyperbolic

Operator History (from monthly production reports)

2023-06 — 2026-07 OVINTIV USA INC. 38 mo

2016-12 — 2023-05 PIEDRA OPERATING, LLC 78 mo

2016-09 — 2016-11 PIONEER NATURAL RES. USA, INC. 3 mo

2011-01 — 2016-08 DEVON ENERGY PRODUCTION CO, L.P. 68 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
3	42-003-42658	OVINTIV USA INC.	1	11,500	2011-02-14
1	42-003-42088	OVINTIV USA INC.	1	11,400	2010-09-24
2	42-003-41121	OVINTIV USA INC.	1	11,000	2009-08-12